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A perspective review of applications of the computed tomography(CT)scan imaging technique for microscopic reservoir rock characterization 认领 引用 被引量：1
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作者 Achinta Bera Bharadwaj Shukla Dhruvikkumar Jogani 《Deep Underground Science and Engineering》 EI CAS CSCD 2026年第1期4-27,共24页
In hospitals,a medical computed tomography(CT)scan is used to detect damage to infected areas of the human body.Using this technology,scientists and engineers have found a way to detect the internal pore connections a... In hospitals,a medical computed tomography(CT)scan is used to detect damage to infected areas of the human body.Using this technology,scientists and engineers have found a way to detect the internal pore connections and characterize rock samples of oil and gas reservoirs in the petroleum industry.Nowadays,the micro-CT scan technique is gaining considerable interest in reservoir rock characterization and in situ monitoring of fluid flow through porous media during different flooding experiments.Along with this digital rock physics(DRP)idea,images have been used to accurately describe and model for simulations of rock samples.In this review,the application of micro-CT and medical-CT scanning in the oil and gas industry has been thoroughly discussed.Recent improvements in DRP and modern imaging techniques in the oil and gas industry have been modeled using both experimental and simulation work.The combination of a DRP study and a CT scan has also been discussed as a unique idea for the current scenario of research work in this field.The available literature shows that the modern imaging technique and the DRP concept can enable an understanding of the pore network model.It has also been observed that the visualization of fluid flow behavior through porous media is now possible during fluid movement through the core samples.This review contributes to the new research area and aids those in this field in quickly gaining an understanding of applied image techniques in the oil and gas industry. 展开更多
关键词 computed tomography scanning technology digital rock physics multiphase flow oil and gas industry porous media reservoir characterization
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A rectangular cross-section field-of-view rotational computed laminography and its analytical reconstruction method 认领 引用
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作者 Xiang Zou Wu-Liang Shi +1 位作者 Mu-Ge Du Yu-Xiang Xing 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2026年第3期18-34,共17页
Rotational computed laminography(CL)has broad application potential in three-dimensional imaging of plate-like objects because it only requires X-rays to pass through the tested object in the thickness direction durin... Rotational computed laminography(CL)has broad application potential in three-dimensional imaging of plate-like objects because it only requires X-rays to pass through the tested object in the thickness direction during the imaging process.In this study,a rectangular cross-section field-of-view rotational CL(RC-CL)is proposed for circuit board imaging.Compared to other rotational CL systems,the field of view is the largest and most suitable for rectangular circuit boards.Meanwhile,as the imaging geometry of RC-CL is significantly different from that of cone-beam CT,the Feldkamp-Davis-Kress(FDK)reconstruction algorithm cannot be used directly.However,transferring the projection data to fit into the CBCT geometry using two-dimensional interpolation introduces interpolation errors.Therefore,an FDK-type analytical reconstruction algorithm applicable to RC-CL was developed.The effectiveness of the method was validated through numerical experiments,and the influence of the tilt angle on the reconstruction results was analyzed.Finally,the RC-CL technique was applied to real defect detection research on circuit boards. 展开更多
关键词 Computed tomography(CT) Computed laminography(CL) Field of view FDK Analytical reconstruction
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An effective method toward large field-of-view gamma-ray computed tomography based on an inverse Compton scattering light source 认领 引用
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作者 Zhi-Jun Chi Hong-Ze Zhang +8 位作者 Jia-Yi Sun Hao Ding Jin Lin Xuan-Qi Zhang Qi-Li Tian Zhi Zhang Ying-Chao Du Wen-Hui Huang Chuan-Xiang Tang 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2026年第5期252-263,共12页
The quasi-monochromatic,continuously energy-tunable,and high-brightness gamma rays that are produced by an inverse Compton scattering(ICS)light source provide an ideal probe for gamma-ray imaging.However,owing to the ... The quasi-monochromatic,continuously energy-tunable,and high-brightness gamma rays that are produced by an inverse Compton scattering(ICS)light source provide an ideal probe for gamma-ray imaging.However,owing to the influence of the intrinsic energy-angle correlation spectrum of this type of light source,monochromatic computed tomography(CT),especially in the gamma-ray energy region,can only be realized in a low-efficiency manner,similar to first-generation CT.A dual-energy scan scheme with a large imaging field of view(FOV)was developed in this study to improve the imaging efficiency.The effectiveness of this scheme was demonstrated based on the beam parameters of a typical ICS light source using Monte Carlo simulations.By leveraging the principle of basis material decomposition,the influence of the energyangle correlation spectrum on CT reconstruction was corrected,and a monochromatic CT image of the imaging object was accurately reconstructed.Furthermore,the electron density and effective atomic number of the imaging object could be obtained simultaneously. 展开更多
关键词 Gamma-ray computed tomography Energy-angle correlation Basis material decomposition Inverse Compton scattering light source Monte Carlo simulation
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Development and validation of a deep-learning-based diagnostic model for drug-induced liver injury using computed tomography images 认领 引用
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作者 Shu-Yue Wang Si-Qi Yin +7 位作者 Jie-Ying Yang Ming-Yan Ji Xiao-Qing Zeng Sheng-Xiang Rao Min-Zhi Lv Jie Bao Man-Ning Wang Hong Gao 《World Journal of Gastroenterology》 SCIE CAS 2026年第15期24-35,共12页
BACKGROUND Pyrrolizidine-alkaloid induced hepatic sinusoidal obstruction syndrome(PAHSOS)is a rare and severe drug-induced liver injury with nonspecific manifestations.Its diagnosis currently relies on exclusive strat... BACKGROUND Pyrrolizidine-alkaloid induced hepatic sinusoidal obstruction syndrome(PAHSOS)is a rare and severe drug-induced liver injury with nonspecific manifestations.Its diagnosis currently relies on exclusive strategies and often necessitates invasive examinations,posing significant clinical challenges.The potential role of artificial intelligence algorithms in diagnosing PA-HSOS remains to be established.AIM To develop and validate a deep-learning-based diagnostic model for PA-HSOS using computed tomography images.METHODS This multicenter case-control study compared PA-HSOS patients with Budd-Chiari syndrome and hepatitis B cirrhosis patients as controls.Patients from Zhongshan Hospital,Fudan University were retrospectively assigned to training or internal test cohorts,while those from the First Affiliated Hospital of Zhengzhou University formed an external cohort.We constructed the diagnostic models using multiscale convolutional modules.Model performance was compared with gastroenterologists and radiologists of varying expertise levels.Additionally,diagnostic outcomes and interpretation time with and without model assistance were evaluated.RESULTS Diagnostic models with deep learning methods using computed tomography images for PA-HSOS were developed.In the internal test cohort,models with different input sizes achieved area under the curve ranging from 0.853 to 0.944.Model 96(96-mm input)demonstrated significantly higher accuracy and specificity than resident physicians(both internal medicine and radiology;P<0.05)and comparable performance to attending specialists.The area under the curve of model 96 in the external test cohort was 0.873.When assisting clinicians,model 96 significantly improved diagnostic accuracy for internal medicine residents(0.541 to 0.757)and attending gastroenterologists(0.730 to 0.892),while reducing interpretation time across all expertise levels(all P<0.05).CONCLUSION The deep learning model demonstrates promising diagnostic performance for PA-HSOS and can effectively assist clinicians in improving diagnostic accuracy and efficiency. 展开更多
关键词 Deep learning Diagnostic model Hepatic sinusoidal obstruction syndrome Drug induced liver injury Computed tomography Pyrrolizidine alkaloids
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Design and verification of pressure-preserved computed tomography testing for deep oil and gas exploration 认领 引用
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作者 Xin Fang Heping Xie +4 位作者 Cong Li Da Guo Dingming Wang Yiwei Zhang Le Zhao 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第4期2794-2810,共17页
Pressure-preserved coring is a highly effective technique for preserving the structural integrity and fluid composition of reservoir cores.However,the lack of specialized testing methodologies hinders the precise eval... Pressure-preserved coring is a highly effective technique for preserving the structural integrity and fluid composition of reservoir cores.However,the lack of specialized testing methodologies hinders the precise evaluation of pressure-preserved core fidelity parameters.To address this challenge,a comprehensive study was conducted on the entire process of pressure-preserved transfer,cutting,and testing,culminating in the development of a pressure-preserved computed tomography(CT)scanning device.The critical technical challenges encountered during the development process were systematically analyzed through mechanical testing,CT scanning,and numerical simulations.Special emphasis was placed on material influencesduring testing,mechanical assembly interactions,and the accuracy of key parameter measurements in oil and gas exploration.Through comparative analysis and multitiered validation methods,polyether ether ketone(PEEK)material was ultimately selected as the key component of the coring device.The simulation and experimental results demonstrated that PEEK,with a maximum tensile strength of 104 MPa,sufficiently meets most core breakage thresholds of 93.942 MPa.Furthermore,CT scanning revealed a porosity measurement error of only 0.111%,confirmingthe reliability of the pressure-preserved CT test equipment.These findingsoffer valuable guidance for improving the precision of pressure-preserved core testing in deep oil and gas reservoirs. 展开更多
关键词 Deep oil and gas Pressure-preserved coring Full-process pressure-preserved testing Pressure-preserved computed tomography(CT)test scanning equipment Test accuracy verification
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Early gastric dilation after laparoscopic sleeve gastrectomy:Insights from a three-dimensional computed tomography reconstruction study 认领 引用
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作者 Zhao Li Wen-Zhi Wu +3 位作者 Yi Song Zhao-Peng Li Dong Guo Yu Li 《World Journal of Gastrointestinal Surgery》 SCIE 2026年第1期111-122,共12页
BACKGROUND Laparoscopic sleeve gastrectomy(LSG)is currently the most commonly performed bariatric surgery owing to its effective weight loss and low complication rates.Nonetheless,some patients experience weight regai... BACKGROUND Laparoscopic sleeve gastrectomy(LSG)is currently the most commonly performed bariatric surgery owing to its effective weight loss and low complication rates.Nonetheless,some patients experience weight regain or insufficient weight loss due to residual gastric dilation,the factors of which remain unclear.AIM To evaluate changes in residual gastric volume after LSG using three-dimensional computed tomography reconstruction and to investigate the factors contributing to gastric dilation.METHODS This retrospective study included 50 patients who underwent LSG.Preoperative clinical and laboratory data were obtained.The residual gastric volume was measured using three-dimensional computed tomography reconstruction at 1 month and 3 months postoperatively.The total sleeve volume,tube volume,antral volume,and tube-to-antral volume ratio were also assessed.Resected gastric volume and staple line length were measured during surgery.Weight metrics and laboratory indices were recorded at 1 month,3 months,6 months,and 12 months postoperatively.The Eating Behavior After Bariatric Surgery Questionnaire and Gastroesophageal Reflux Disease Questionnaire(GERD-Q)were used to assess the dietary behavior of patients after LSG.Correlation between the degree of residual gastric dilation and percent total weight loss(%TWL)at 12 months postoperatively was analyzed.Univariate and multivariate correlation analyses were conducted to identify risk factors for residual gastric dilation after LSG.RESULTS The 50 included patients had a mean preoperative body mass index of 42.27±7.19 kg/m2 and average%TWL of 34%±7%at 1 year after LSG.At 1 month after LSG,the mean tube volume,antral volume,and total sleeve volume were 45.93±16.75 mL,115.85±44.92 mL,and 161.77±55.37 mL,respectively.At 3 months after LSG,the residual gastric volume showed statistically significant dilation(average dilation degree:13.50%±17.35%).%TWL at 1 year significantly correlated with residual gastric dilation(P<0.05).Univariate and multivariate linear regression analyses revealed that preoperative type 2 diabetes,residual gastric volume at 1 month after LSG,and GERD-Q scores were independent risk factors influencing the degree of residual gastric dilation.CONCLUSION In conclusion,residual gastric dilation after LSG significantly affected the efficacy of weight loss.Preoperative type 2 diabetes,residual gastric volume at 1 month after LSG,and GERD-Q scores were independent risk factors affecting the degree of residual gastric dilation. 展开更多
关键词 Laparoscopic sleeve gastrectomy Residual gastric dilation Three-dimensional computed tomography reconstruction Weight loss efficacy Residual gastric volume Bariatric surgery
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Computed tomography with carcinoembryonic antigen and carbohydrate antigen 19-9 in diagnosing lymph node metastasis of early gastric cancer 认领 引用
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作者 Hong-Zhi Chen Ping Zhang Jun Ma 《World Journal of Gastrointestinal Oncology》 SCIE 2026年第2期112-121,共10页
BACKGROUND Gastric cancer(GC)is the fifth most prevalent and fourth most lethal malignancy globally.China bears a disproportionately high burden,accounting for 44.0%of new cases and 48.6%of deaths worldwide.In early G... BACKGROUND Gastric cancer(GC)is the fifth most prevalent and fourth most lethal malignancy globally.China bears a disproportionately high burden,accounting for 44.0%of new cases and 48.6%of deaths worldwide.In early GC(EGC),the presence of lymph node metastasis(LNM)is a critical prognostic determinant that directly guides therapeutic strategy.While multi-detector computed tomography(CT)and serum biomarkers carcinoembryonic antigen(CEA)/carbohydrate antigen 19-9(CA19-9)are established diagnostic tools,each demonstrates limited efficacy when used independently.This study therefore aims to verify whether a combined diagnostic approach integrating multi-detector CT(MDCT)with serum CEA/CA19-9 can significantly improve the accuracy of LNM detection in EGC patients.AIM To investigate the diagnostic value of CT combined with CEA or CA19-9 for detecting LNM in EGC.METHODS This retrospective study included 120 patients with EGC confirmed by gastroscopic biopsy at our institution(Huai’an Hospital of Huai’an City)between February 2024 and August 2024.Based on postoperative pathological findings,participants were categorized into a LNM group(n=60)and a non-metastasis group(n=60).All patients underwent MDCT scanning and serum CEA and CA19-9 level measurements.The diagnostic efficacy of CT,CEA,and CA19-9 alone and in combination was evaluated using receiver operating characteristic(ROC)curve and Kappa consistency analysis.RESULTS Serum analysis showed significantly elevated CEA and CA19-9 levels and higher positivity rates in the metastasis group(P<0.0001).ROC analysis yielded area under the curves of 0.9443(CEA)and 0.9292(CA19-9),with Kappa values of 0.683 and 0.650,respectively.CT revealed significantly greater short-axis diameter,CT attenuation,blood volume,and permeability in metastatic nodes(P<0.05),whereas blood flow and mean transit time showed no significant differences.CT alone demonstrated 85.00%sensitivity and 95.00%specificity(Kappa=0.800).Combined diagnosis improved sensitivity to 91.67%(CT+CEA)and 90.00%(CT+CA19-9),with specificities of 90.00%and 88.33%,respectively.CONCLUSION The combination of CT with CEA or CA19-9 improves sensitivity for detecting LNM in EGC,supporting personalized treatment planning and demonstrating clinical value. 展开更多
关键词 Computed tomography Carcinoembryonic antigen Carbohydrate antigen 19-9 Gastric cancer Lymph node metastasis
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Photon-counting computed tomography enables low-dose,highquality abdominal imaging:A comparative study with energyintegrating detector computed tomography 认领 引用
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作者 Ting-Ting Zhu Xiao-Yun Zhu +3 位作者 Min Yang Wan-Min Liu Wen-Jie Yang Xiao Liu 《World Journal of Radiology》 2026年第5期34-44,共11页
BACKGROUND Although photon-counting computed tomography(PCCT)has demonstrated superior dose efficiency and image quality compared with conventional energyintegrating detector computed tomography(EID-CT)in theory and i... BACKGROUND Although photon-counting computed tomography(PCCT)has demonstrated superior dose efficiency and image quality compared with conventional energyintegrating detector computed tomography(EID-CT)in theory and in some clinical fields,systematic evaluations of its performance in abdominal imaging,particularly comprehensive studies incorporating both radiation dose and image quality,remain very limited.AIM To compare radiation dose and image quality between PCCT and conventional EID-CT in abdominal imaging,and to evaluate the potential of PCCT for lowdose,high-quality clinical applications.METHODS Eighty participants were included,comprising 40 subjects who underwent prospective abdominal PCCT and 40 subjects retrospectively matched who underwent routine abdominal EID-CT.Radiation dose parameters[computed tomography dose index(CTDIvol),dose-length product,and effective dose]were recorded.Objective image quality was assessed using signal-to-noise ratio(SNR),contrast-to-noise ratio(CNR),dose-normalized metrics[SNR/(CTDIvol)1/2 and CNR/(CTDIvol)1/2],noise ratio,and excellent image index.Subjective image quality was evaluated by two experienced radiologists using a five-point Likert scale.Intergroup comparisons were performed using appropriate parametric or nonparametric statistical tests.RESULTS Compared with EID-CT,PCCT achieved an approximate 50%reduction in CTDIvol,dose-length product,and effective dose(all P<0.001).PCCT demonstrated significantly higher SNR,CNR,SNR/(CTDIvol)1/2,CNR/(CTDIvol)1/2,and excellent image index,along with a lower noise ratio,indicating superior noise uniformity(all P<0.001).Subjective assessment showed that 77.5%of PCCT images were rated as excellent(Likert score=5),compared with 10.0%in the EID-CT group(P<0.001).CONCLUSION PCCT provides substantially improved dose efficiency and image quality compared with conventional EID-CT in abdominal imaging,supporting its potential role in low-dose clinical computed tomography protocols. 展开更多
关键词 Photon-counting computed tomography Energy-integrating detector computed tomography Low-dose imaging Image quality Abdominal imaging
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Artificial intelligence-based lung nodule detection for pulmonary arteriovenous fistulas on chest computed tomography 认领 引用
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作者 Kimei Azama Nanae Tsuchiya +2 位作者 Shun Toyosato Koji Yonemoto Akihiro Nishie 《World Journal of Radiology》 2026年第4期25-33,共9页
BACKGROUND Pulmonary arteriovenous fistulas(PAVFs)are abnormal vascular communications between pulmonary arteries and veins that may cause hypoxemia and paradoxical embolism.Because many patients are asymptomatic,PAVF... BACKGROUND Pulmonary arteriovenous fistulas(PAVFs)are abnormal vascular communications between pulmonary arteries and veins that may cause hypoxemia and paradoxical embolism.Because many patients are asymptomatic,PAVFs are often detected incidentally on chest computed tomography(CT).Accurate identification of PAVFs is clinically important for appropriate management;however,small or atypical lesions may be overlooked during routine interpretation.Computer-aided detection(CAD)systems for pulmonary nodules are widely used in clinical practice,but their ability to detect PAVFs has not been systematically evaluated.We hypothesized that a lung nodule-based artificial intelligence(AI)-CAD system could detect PAVFs on chest CT.AIM To evaluate the detectability of PAVFs on chest CT using an AI-based CAD system for lung nodules.METHODS This retrospective observational study included 21 patients with 26 PAVFs identified at University of the Ryukyus Hospital between 2009 and 2021.Chest CT images,including non-contrast and contrast-enhanced scans,were analyzed using a commercially available AI-based lung nodule CAD system.Detection performance was classified as consistent,conditional,or failed detection,and lesion characteristics associated with successful detection were analyzed.Correlations between CAD-derived measurements and manual measurements were assessed using Pearson’s correlation coefficient. 展开更多
关键词 Pulmonary arteriovenous fistulas Lung nodule Artificial intelligence Computer-aided detection Computed tomography
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Quantitative oximetry with photoacoustic computed tomography:Principles,progress,and prospects 认领 引用 被引量：1
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作者 Xingyang Liu Chuhua Wu +4 位作者 Songde Liu Chenlong Zhu Rongkang Gao Cheng Ma Chao Tian 《Journal of Innovative Optical Health Sciences》 SCIE EI CSCD 2026年第4期22-46,共25页
Photoacoustic computed tomography(PACT)is an emerging biomedical imaging modality that uniquely combines high spatial resolution with deep penetration,holding great promise for noninvasive mapping of tissue oxygen sat... Photoacoustic computed tomography(PACT)is an emerging biomedical imaging modality that uniquely combines high spatial resolution with deep penetration,holding great promise for noninvasive mapping of tissue oxygen saturation(sO2)—a critical biomarker in metabolism and pathophysiology.However,achieving accurate quantitative sO2 mapping is fundamentally challenged by the spatiotemporal heterogeneity of opticalfluence,which leads to the spectral coloring effect and severely distorts measurements in deep tissue.This review systematically summarizes the evolution of quantitative PACT oximetry,critically analyzing techniques devised to overcome this bottleneck.We explore the limitations of linear unmixing and provide a focused analysis of advanced correction strategies,including photon transport modeling,acoustic-spectrum-based self-calibration,multimodality fusion,statistical inference,and learning-based approaches.By synthesizing and contrasting the strengths and weaknesses of these diverse approaches,this review aims to serve as a comprehensive reference for researchers,supporting the development of robust oximetry techniques and facilitating the clinical translation of PACT. 展开更多
关键词 Photoacoustic computed tomography blood oxygen saturation fluence correction deep learning
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Multimodal photoacoustic computed tomography technology and applications 认领 引用 被引量：1
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作者 Huiting Wen Wufan Chen +1 位作者 Li Qi Shuangyang Zhang 《Journal of Innovative Optical Health Sciences》 SCIE EI CSCD 2026年第3期40-69,共30页
Photoacoustic computed tomography(PACT)combines optical functional contrast with ultrasonic spatial resolution,enabling noninvasive structural and functional imaging of deep tissues.However,PACT has inherent limitatio... Photoacoustic computed tomography(PACT)combines optical functional contrast with ultrasonic spatial resolution,enabling noninvasive structural and functional imaging of deep tissues.However,PACT has inherent limitations,including low soft tissue anatomical contrast,depth-dependent quantitative accuracy,and limited penetration depth.By integrating PACT with ultrasound imaging,magnetic resonance imaging(MRI),optical imaging(fluorescence imaging,optical coherence tomography,Raman imaging),and radiological imaging(CT,SPECT/PET),complementary and enhanced information across modalities can be achieved.This review systematically outlines the principles and mechanisms of multimodal PACT techniques,including hardware integration,image registration,probe development,and dual-modality system design.It also introduces practical applications across fields,including tumor diagnosis,neuroscience,vascular disease assessment,and skin lesion detection.Research indicates that multimodal PACT can integrate structural anatomy,functional metabolism,and molecular specificity information,leading to more comprehensive imaging.This provides a powerful tool for preclinical research and clinical translation,offering broad application prospects. 展开更多
关键词 Photoacoustic computed tomography multimodal imaging image fusion image registration functional imaging
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Three-dimensional characterization of intermetallic compound formation in magnesium alloys with micro X-ray computed tomography 认领 引用
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作者 SUN Wei HU Xiao-juan +5 位作者 DENG Yang-chao YANG Yang YAO Hu ZHANG Yong-hong ZHANG Rui-feng ZENG Guang 《Journal of Central South University》 SCIE EI CAS CSCD 2026年第1期160-174,共15页
This comprehensive study investigates the formation and evolution of intermetallic compounds during the solidification process of magnesium alloys using advanced micro X-ray computed tomography.By analyzing both commo... This comprehensive study investigates the formation and evolution of intermetallic compounds during the solidification process of magnesium alloys using advanced micro X-ray computed tomography.By analyzing both common industrial Mg-Al-Zn alloys and a novel rare earth-containing Mg-Ni-Gd-Y alloy,we aim to characterize the nucleation,growth,and distribution of Al-Mn and eutectic intermetallics across various stages of solidification.The non destructive imaging technique employed in this research provides high-resolution,three-dimensional insights into the microstructural development,allowing for a detailed examination of the morphology,spatial arrangement,and interconnectivity of intermetallic phases.This approach overcomes limitations of traditional two-dimensional metallographic methods,offering a more comprehensive understanding of the complex three-dimensional structures formed during solidification. 展开更多
关键词 magnesium alloy X-ray computed tomography solidification intermetallics defects
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Sex estimation based on multi-slice computed tomography analysis of the maxilla-frontal sinuses 认领 引用
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作者 Mohamed Bellali Syrine Azza Manoubi +5 位作者 Ghassen Abid Azza Belhaj Najla Mnif Myriam Jrad Mohamed Allouche Mehdi Ben Khelil 《Forensic Sciences Research》 CSCD 2026年第1期81-89,共9页
Radiographic identification is currently making an important contribution to forensic anthropology.Several studies have reported that evaluating the maxillary sinus(MS)and the frontal sinus(FS)can be an effective tech... Radiographic identification is currently making an important contribution to forensic anthropology.Several studies have reported that evaluating the maxillary sinus(MS)and the frontal sinus(FS)can be an effective technique for estimating sex.However,there is a lack of data on these measures for modern inhabitants of North Africa,so population-specific norms must be established.This study aims to analyse the correlation between sex and MS and FS measurements in a contemporary Tunisian population using multi-slice computed tomography(MSCT).The study involves a retrospective data collection of 354 cranial MSCTs from 188 men and 166 women.The ASiRTM software was used to create 28 landmarks and measure 24 distances as well as eight volumes.In this study,15 measurements were proposed for the first time,including seven distances and eight volumes.The data were analysed using univariate analysis and logistic regression to create and validate a discriminant equation.The results showed that males had higher mean values of the MS and FS(P<0.05).A six-variable model was able to accurately predict sex with a sensitivity of 77.9%,a specificity of 75.6%,and an accuracy of 76.8%,with a sex bias of−4%.The MS was a better predictor of sex than the FS(accuracy of 70.1%and 65.5%,respectively).The highest accuracy was associated with the minimum inter-maxillary sinus distance.The findings indicate that MS and FS MSCT measurements are highly dimorphic and can provide an accurate alternative for sex estimation in contemporary North African individuals. 展开更多
关键词 forensic sciences sex estimation computed tomography maxillary sinus frontal sinus
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Computed Tomography Scans in the Prediction of Margin-Negative Resection in Pancreatic Cancer Following Neoadjuvant Treatment:An Updated Systematic Review and Meta-Analysis 认领 引用
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作者 Ehsan Emami Dina Seyedi +12 位作者 Alireza Hassanpour Faizan Bashir Elina Attaran Maryam Mostofi Mohammadjavad Abbaspour Farzin Tahmasbi Arashlow Pariya Zibaei Alaleh Alizadeh Neda Tizro Arash Saberian Komeil Aghazadeh-Habashi Masoud Noroozi Niloofar Deravi 《iRADIOLOGY》 CSCD 2026年第2期147-156,共10页
Pancreatic cancer is a highly lethal malignancy with a rising incidence.An early diagnosis of pancreatic cancer is challenging,and although computed tomography(CT)scans are the primary imaging modality for assessing r... Pancreatic cancer is a highly lethal malignancy with a rising incidence.An early diagnosis of pancreatic cancer is challenging,and although computed tomography(CT)scans are the primary imaging modality for assessing resectability after neoadjuvant treatment,their accuracy in predicting margin-negative(R0)resection remains a concern.This systematic review and metaanalysis evaluated the role of CT scans in predicting R0 resection in patients with pancreatic cancer post-neoadjuvant therapy.A search of PubMed,Scopus,and Google Scholar was conducted up to October 4,2025,with adherence to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines.Study selection,data extraction,and quality assessment were performed independently by two reviewers.Pooled sensitivity,specificity,and the area under the curve were assessed using the bivariate random-effects model.Nine unique articles providing 10 study estimates met the inclusion criteria.A meta-analysis showed significant heterogeneity for specificity(I2=87%)and sensitivity(I2=90%).Pooled sensitivity was 0.50(95%confidence interval[CI]:0.34–0.66)and pooled specificity was 0.75(95%CI:0.61–0.85).The area under the curve for overall diagnostic performance was 0.69(95%CI:0.65–0.73).The pooled diagnostic odds ratio was 3.00(95%CI:1.85–4.86).Deeks'funnel plot analysis showed no significant publication bias.Although CT scans play a crucial role in pancreatic cancer staging,their ability to predict R0 resection after neoadjuvant therapy is limited by low sensitivity and moderate specificity,as shown by the low area under the curve.These findings indicate the requirement for multimodal preoperative assessment strategies incorporating advanced imaging techniques and other diagnostic modalities to improve surgical planning and patients'outcomes. 展开更多
关键词 computed tomography margin-negative resection neoadjuvant therapy pancreatic cancer sensitivity specificity
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Multiphase enhanced computed tomography features captured by delta radiomics reveal prognosis and tumor heterogeneity in patients with hepatocellular carcinoma treated with transarterial chemoembolization 认领 引用
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作者 Zhong-Qi Sun Dong-Min Liu +5 位作者 Lei Yang Kai Zhao Hao Jiang Sheng Zhao Jin-Ping Li Hui-Jie Jiang 《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS CSCD 2026年第4期422-431,共10页
Background:Although transarterial chemoembolization(TACE)is a widely used locoregional therapy for intermediate-stage hepatocellular carcinoma(HCC),there is substantial inter-patient heterogeneity in treatment respons... Background:Although transarterial chemoembolization(TACE)is a widely used locoregional therapy for intermediate-stage hepatocellular carcinoma(HCC),there is substantial inter-patient heterogeneity in treatment response.This study aimed to develop a delta radiomic model based on pre-treatment en-hanced computed tomography(CT)to predict the prognosis of HCC patients undergoing TACE and to reveal tumor heterogeneity.Methods:A total of 269 patients treated with TACE between January 2016 and June 2020 were enrolled from two medical centers and divided into three cohorts:a training cohort(n=126),an internal val-idation cohort(n=84),an external test cohort(n=59).Radiological features of the tumor area were extracted on multiple phases of CT before treatment,and progression-free survival(PFS)was predicted through the least absolute shrinkage and selection operator Cox(LASSO-Cox)regression algorithm.Overall survival(OS)was evaluated using the Kaplan-Meier curve.Genetic and tumor microenvironment differ-ences related to the prognosis of TACE were analyzed in 23 patients with CT from The Cancer Genome Atlas(TCGA).Single-cell data from the comprehensive Gene Expression Omnibus(GEO)public database were used to explore the expression of different genes in cells.Results:The area under the receiver operating characteristic curves of the delta radiomic model for pre-dicting 2-year PFS in TACE-treated patients were 0.812,0.720,and 0.807 in the training,internal vali-dation,and external test cohorts,respectively.The Rad-score was calculated based on radiomic features selected through LASSO.The Rad-score stratified patients into high-and low-risk groups,with significant differences in OS across all cohorts.The high-risk group had a higher immune score.It is worth noting that in the immune infiltration analysis,there were significant differences in B cells,resting CD4 memory T cells,active natural killer cells,and mast cells among different risk groups.Conclusions:The delta radiomics model based on multiphase enhanced CT accurately predicts prognosis and reflects tumor heterogeneity in HCC patients treated with TACE,and contributes to treatment planning. 展开更多
关键词 Hepatocellular carcinoma Delta radiomics Computed tomography Transarterial chemoembolization
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Development and validation of prognostic models for colon cancer incorporating extramural vascular invasion assessed by contrastenhanced computed tomography 认领 引用
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作者 Mei-Rong Wang Liang-Fang Zheng +5 位作者 Fan Yang Xiao-Yu Gu Ju-Shun Yang Fei-Xiang Chen Jia-Min Liu Bo-Sheng He 《World Journal of Gastroenterology》 SCIE CAS 2026年第14期47-60,共14页
BACKGROUND Extramural vascular invasion(EMVI)represents a crucial high-risk pathological feature in colon cancer,strongly linked to lymph node involvement,distant dissemination,and local recurrence.Advanced analytical... BACKGROUND Extramural vascular invasion(EMVI)represents a crucial high-risk pathological feature in colon cancer,strongly linked to lymph node involvement,distant dissemination,and local recurrence.Advanced analytical techniques such as machine-learning and nomogram modeling enable the integration of multifactorial prognostic variables,facilitating precise risk stratification and individualized therapeutic decision-making.We postulated that computed tomography(CT)-detected EMVI(ctEMVI)served as an independent determinant of disease-free survival(DFS)in patients with colon cancer,and incorporating ctEMVI into machine-learning-driven predictive models alongside clinicopathological variables,within a nomogram-based framework,would enable more accurate individualized postoperative risk stratification and improve DFS prediction.AIM To develop and validate interpretable DFS prediction models for colon cancer by combining multiple machinelearning algorithms with a nomogram framework based on ctEMVI.METHODS In this retrospective analysis,comprehensive clinical,radiological,and pathological information was collected from 101 patients who underwent curative resection for colon cancer.Based on findings from preoperative contrastenhanced CT,patients were stratified into ctEMVI-positive and ctEMVI-negative groups.DFS was estimated using Kaplan-Meier methods and compared with log-rank tests.Prognostic variables independently associated with DFS were identified through Cox proportional hazards regression and subsequently integrated into machine-learningbased predictive models and a nomogram framework.The discriminative ability,calibration accuracy,clinical utility,and interpretability of these models were systematically evaluated using receiver operating characteristic curves,calibration plots,decision curve analysis,and SHapley Additive exPlanations.RESULTS Among 101 patients,40 were ctEMVI-positive and 61 ctEMVI-negative.The ctEMVI was significantly associated with T staging determined by CT,lymph node status determined by CT,pathological T stage,pathological nodal status,lymph node ratio,lymphovascular invasion,and perineural invasion(all P<0.05).During follow-up,29 patients experienced recurrence or metastasis,including 19 in the ctEMVI-positive group,which showed significantly poorer DFS.Multivariate Cox analysis identified ctEMVI,pathological nodal status,lymphovascular invasion,and perineural invasion as independent predictors of DFS.The nomogram demonstrated good performance,with area under the receiver operating characteristic curve values of 0.791(95%CI:0.644-0.937)for 1-year and 0.796(95%CI:0.686-0.906)for 3-year DFS,while CoxBoost achieved the best 2-year DFS prediction(area under the receiver operating characteristic curve=0.773,95%CI:0.659-0.886).SHapley Additive exPlanations analysis confirmed model interpretability and variable importance.CONCLUSION The ctEMVI was a significant prognostic factor in colon cancer,and CoxBoost and nomogram models accurately predicted DFS after curative resection. 展开更多
关键词 Colon cancer Computed tomography-detected extramural vascular invasion Disease-free survival Machine learning Nomogram
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Combined multidetector computed tomography and gastrointestinal endoscopy for gastric cancer screening,preoperative staging,and lymph node metastasis detection 认领 引用
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作者 Le-Ping Ye Yan-Ping Zhang +4 位作者 Gang Chen Yi-Xian Wu Cheng-Long He Dong Wang Qiao Mei 《World Journal of Gastrointestinal Oncology》 SCIE 2026年第1期200-210,共11页
BACKGROUND Early screening,preoperative staging,and diagnosis of lymph node metastasis are crucial for improving the prognosis of gastric cancer(GC).AIM To evaluate the diagnostic value of combined multidetector compu... BACKGROUND Early screening,preoperative staging,and diagnosis of lymph node metastasis are crucial for improving the prognosis of gastric cancer(GC).AIM To evaluate the diagnostic value of combined multidetector computed tomography(MDCT)and gastrointestinal endoscopy for GC screening,preoperative staging,and lymph node metastasis detection,thereby providing a reference for clinical diagnosis and treatment.METHODS In this retrospective study clinical and imaging data of 134 patients with suspected GC who were admitted between January 2023 and October 2024 were initially reviewed.According to the inclusion and exclusion criteria,102 patients were finally enrolled in the analysis.All enrolled patients had undergone both MDCT and gastrointestinal endoscopy examinations prior to surgical intervention.Preoperative clinical staging and lymph node metastasis findings were compared with pathological results.RESULTS The combined use of MDCT and gastrointestinal endoscopy demonstrated a sensitivity of 98.53%,specificity of 97.06%,accuracy of 98.04%,positive predictive value of 98.53%,and negative predictive value of 97.06%for diagnosing GC.These factors were all significantly higher than those of MDCT or endoscopy alone(P<0.05).The accuracy rates of the combined approach for detecting clinical T and N stages were 97.06%and 92.65%,respectively,outperforming MDCT alone(86.76%and 79.41%)and endoscopy alone(85.29%and 70.59%)(P<0.05).Among 68 patients with confirmed GC,50(73.53%)were pathologically diagnosed with lymph node metastasis.The accuracy for detecting lymph node metastasis was 66.00%with endoscopy,76.00%with MDCT,and 92.00%with the combined approach,all with statistically significant differences(P<0.05).CONCLUSION The combined application of MDCT and gastrointestinal endoscopy enhanced diagnostic accuracy for GC,provided greater consistency in preoperative staging,and improved the detection of lymph node metastasis,thereby demonstrating significant clinical utility. 展开更多
关键词 Multidetector computed tomography Gastrointestinal endoscopy Gastric cancer Preoperative staging Lymph node metastasis
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Predictive value of preoperative computed tomography parameters for meniscal and cruciate ligament injuries in tibial plateau fractures:Meta-analysis 认领 引用
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作者 Ahmed Abdelazim A Hassan Ahmed A Khalifa +2 位作者 Antia Rodriguez Villalon Dimitri Hauri Tracy Y Zhu 《World Journal of Orthopedics》 2026年第4期163-176,共14页
BACKGROUND Tibial plateau fractures(TPFs),although comprising only 1%of all fractures,pose significant diagnostic and management challenges due to their frequent association with meniscal and ligamentous injuries.Comp... BACKGROUND Tibial plateau fractures(TPFs),although comprising only 1%of all fractures,pose significant diagnostic and management challenges due to their frequent association with meniscal and ligamentous injuries.Computed tomography(CT),widely employed in preoperative assessment of TPFs,may provide predictive insights into soft tissue injuries.AIM To evaluate the diagnostic accuracy of preoperative quantitative CT parameters in predicting meniscal and cruciate ligament injuries associated with TPFs.METHODS A systematic review was conducted per the PRISMA guidelines.Two databases(PubMed and Scopus)were searched up to October 2024.Studies were included if they involved skeletally mature patients with TPFs,reported at least one CT parameter predictive of soft tissue injury,and used arthroscopy or open surgery as the diagnostic gold standard.A risk of bias assessment was conducted using the Quality Assessment of Diagnostic Accuracy Studies 2 tool,and meta-analyses were performed where appropriate,using the random-effects model.RESULTS Lateral plateau depression(LPD)and lateral plateau widening(LPW)were the most commonly assessed parameters.Pooled analysis revealed that LPD and LPW were significantly higher in patients with lateral meniscus injuries(mean difference,5.23 mm and 1.37 mm,respectively;P<0.00001 and P=0.02).No significant associations were found for medial plateau depression or LPD with medial meniscus or posterior cruciate ligament injuries.Lateral area of depression and LPW were reported in a single study to be predictive of anterior cruciate ligament injuries.CONCLUSION Preoperative CT parameters,particularly LPD and LPW,provide a strong predictive value for lateral meniscus injuries in TPFs,potentially aiding in early diagnosis and management.However,their utility in predicting cruciate or medial meniscus injuries remains limited.CT scan remains a valuable first-line tool,especially where magnetic resonance imaging is inaccessible,and can guide further investigation or intraoperative planning. 展开更多
关键词 Tibial plateau fracture Meniscal injury Computed tomography Cruciate ligament injury Meta-analysis Systematic review
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Deep learning techniques for using computed tomography imaging for hepatocellular carcinoma diagnosis,treatment and prognosis 认领 引用
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作者 Yao Chen Qiang Zhang Ming-Yang Zhang 《World Journal of Gastroenterology》 SCIE CAS 2026年第5期17-35,共19页
Hepatocellular carcinoma(HCC),the predominant form of primary liver cancer,significantly threatens to global health.Despite considerable advances in diagnostic and therapeutic approaches in recent years,the prognosis ... Hepatocellular carcinoma(HCC),the predominant form of primary liver cancer,significantly threatens to global health.Despite considerable advances in diagnostic and therapeutic approaches in recent years,the prognosis for patients with HCC remains unsatisfactory.The emergence of artificial intelligence(AI),particularly deep learning technologies,offers new hope for improving the diagnosis and treatment of HCC.Researchers have extensively explored ways to integrate deep learning models into the clinical management of HCC patients,which provides a valuable foundation for developing more personalized treatment strategies.Compared with other detection methods,computed tomography(CT)has attracted significant research interest because of its comprehensive advantages,including wide availability and high resolution,making it well suited for AIpowered analysis.This review systematically integrates deep learning technologies for HCC based on CT imaging,while focusing primarily on tumor diagnosis,segmentation,treatment response prediction,and patient prognosis prediction.Moreover,we review popular deep learning networks in various fields and describe the advantages of these prevalent deep learning models for different applications.Furthermore,we discuss the outstanding challenges in applying deep learning to extract information from CT images for the diagnosis and treatment of HCC patients.These insights could provide guidance for subsequent studies. 展开更多
关键词 Hepatocellular carcinoma Computed tomography Deep learning Diagnosis Treatment Prognosis
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Rationalizing whole-body computed tomography in trauma:A national audit on resource utilization and strategies to minimize radiation exposure 认领 引用
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作者 Latifah Al-Kandari Michael A Masoomi +2 位作者 Abdelhamid A El-Gargani Mahdy-Abass Hamza Rami M Agha 《World Journal of Radiology》 2026年第1期46-56,共11页
BACKGROUND Major trauma is the sixth leading cause of death worldwide and the leading cause of death and disability in the population aged 5 years to 45 years.The assessment is typically guided by strict protocols to ... BACKGROUND Major trauma is the sixth leading cause of death worldwide and the leading cause of death and disability in the population aged 5 years to 45 years.The assessment is typically guided by strict protocols to quickly identify life-threatening conditions before conducting a comprehensive evaluation of other injuries.Whole-body computed tomography(WBCT)is often indiscriminately used in trauma cases.AIM To assess the effective use of WBCT in patients with trauma across radiology departments in State of Kuwait,evaluate the true incidence of critical injuries,and minimize unnecessary radiation exposure.METHODS This multicenter,retrospective study across seven radiology departments included 1367 patients with trauma who underwent WBCT between 2022 and 2023,according to the American College of Radiology guidelines.Data on age,sex,injury mechanism,clinical indications,dose-length product,and WBCT findings were collected and analyzed using IBM SPSS version 25.RESULTS Of 1367 referrals,578(42.3%)had no significant findings,while 789(57.7%)showed positive trauma-related results.Among the positive findings,530 patients(38.8%)had major injuries,including solid organ and vertebral column injuries.The most common causes of WBCT referrals were road traffic accidents(911 patients,66.6%),falls from height(182 patients,13%),falls of heavy objects(112 patients,8%),head trauma(82 patients,6%),buggy accidents(28 patients,2%)and others.Negative WBCT findings had a mean effective dose of 19.98±10.26 mSv.CONCLUSION This national audit demonstrates that a substantial proportion of WBCT scans in patients with trauma are negative(42.3%),underscoring the need to rationalize imaging practices.The findings highlight the importance of evidence-based stewardship to enhance trauma care delivery in State of Kuwait. 展开更多
关键词 Patients with trauma Whole-body computed tomography Emergency Department Radiology Effective dose
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