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Computerized tomography-guided therapeutic percutaneous puncture catheter drainage-combined with somatostatin for severe acute pancreatitis: An analysis of efficacy and safety 认领 引用 被引量：6
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作者 Xue-Lan Zheng Wan-Ling Li +1 位作者 Yan-Ping Lin Ting-Long Huang 《World Journal of Gastrointestinal Surgery》 SCIE 2024年第1期59-66,共8页
BACKGROUND Severe acute pancreatitis(SAP),a condition with rapid onset,critical condition and unsatisfactory prognosis,poses a certain threat to human health,warranting optimization of relevant treatment plans to impr... BACKGROUND Severe acute pancreatitis(SAP),a condition with rapid onset,critical condition and unsatisfactory prognosis,poses a certain threat to human health,warranting optimization of relevant treatment plans to improve treatment efficacy.AIM To evaluate the efficacy and safety of computerized tomography-guided the-rapeutic percutaneous puncture catheter drainage(CT-TPPCD)combined with somatostatin(SS)in the treatment of SAP.METHODS Forty-two SAP patients admitted to The Second Affiliated Hospital of Fujian Medical University from June 2020 to June 2023 were selected.On the basis of routine treatment,20 patients received SS therapy(control group)and 22 patients were given CT-TPPCD plus SS intervention(research group).The efficacy,safety(pancreatic fistula,intra-abdominal hemorrhage,sepsis,and organ dysfunction syndrome),abdominal bloating and pain relief time,bowel recovery time,hospital stay,inflammatory indicators(C-reactive protein,interleukin-6,and pro-calcitonin),and Acute Physiology and Chronic Health Evaluation(APACHE)II score of both groups were evaluated for comparison.RESULTS Compared with the control group,the research group had a markedly higher total effective rate,faster abdominal bloating and pain relief and bowel recovery,INTRODUCTION Pancreatitis,an inflammatory disease occurring in the pancreatic tissue,is classified as either acute or chronic and is associated with high morbidity and mortality,imposing a socioeconomic burden[1,2].The pathogenesis of this disease involves early protease activation,activation of nuclear factor kappa-B-related inflammatory reactions,and infiltration of immune cells[3].Severe acute pancreatitis(SAP)is a serious condition involving systemic injury and subsequent possible organ failure,accounting for 20%of all acute pancreatitis cases[4].SAP is also characterized by rapid onset,critical illness and unsatisfactory prognosis and is correlated with serious adverse events such as systemic inflammatory response syn-drome and acute lung injury,threatening the health of patients[5,6].Therefore,timely and effective therapeutic inter-ventions are of great significance for improving patient prognosis and ensuring therapeutic effects.Somatostatin(SS),a peptide hormone that can be secreted by endocrine cells and the central nervous system,is in-volved in the regulatory mechanism of glucagon and insulin synthesis in the pancreas[7].It has complex and pleiotropic effects on the gastrointestinal tract,which can inhibit the release of gastrointestinal hormones and negatively modulate the exocrine function of the stomach,pancreas and bile,while exerting a certain influence on the absorption of the di-gestive system[8,9].SS has shown certain clinical effectiveness when applied to SAP patients and can regulate the severity of SAP and immune inflammatory responses,and this regulation is related to its influence on leukocyte apoptosis and adhesion[10,11].Computerized tomography-guided therapeutic percutaneous puncture catheter drainage(CT-TPPCD)is a surgical procedure to collect lesion fluid and pus samples from necrotic lesions and perform puncture and drainage by means of CT image examination and precise positioning[12].In the research of Liu et al[13],CT-TPPCD applied to pa-tients undergoing pancreatic surgery contributes to not only good curative effects but also a low surgical risk.Baudin et al[14]also reported that CT-TPPCD has a clinical success rate of 64.6%in patients with acute infectious necrotizing pan-creatitis,with nonfatal surgery-related complications found in only two cases,suggesting that this procedure is clinically effective and safe in the treatment of the disease.In light of the limited studies on the efficacy and safety of SS plus CT-TPPCD in SAP treatment,this study performed a relevant analysis to improve clinical outcomes in SAP patients. 展开更多
关键词 Computerized tomography guidance Therapeutic percutaneous puncture catheter drainage Somatostatin Severe acute pancreatitis Efficacy and safety
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Pore structure of ore granular media by computerized tomography image processing 认领 引用 被引量：7
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作者 吴爱祥 杨保华 +1 位作者 习泳 江怀春 《Journal of Central South University of Technology》 2007年第2期220-224,共5页
The pore structure images of ore particles located at different heights of leaching column were scanned with X-ray computerized tomography (CT) scanner, the porosity and pore size distribution were calculated and the ... The pore structure images of ore particles located at different heights of leaching column were scanned with X-ray computerized tomography (CT) scanner, the porosity and pore size distribution were calculated and the geometrical shape and connectivity of pores were analyzed based on image process method, and the three dimensional reconstruction of pore structure images was realized. The results show that the porosity of ore particles bed in leaching column is 42.92%, 41.72%, 39.34% at top, middle and bottom zone, respectively. Obviously it has spatial variability and decreases appreciably along the height of the column. The overall average porosity obtained by image processing is 41.33% while the porosity gotten from general measurement method in laboratory is 42.77% showing the results of both methods are consistent well. The pore structure of ore granular media is characterized as a dynamical space network composed of interconnected pore bodies and pore throats. The ratio of throats with equivalent diameter less than 1.91 mm to the total pores is 29.31%, and that of the large pores with equivalent diameter more than 5.73 mm is 2.90%. 展开更多
关键词 ore granular media pore structure X-ray computerized tomography image processing
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Application of Proton Magnetic Resonance Spectroscopy and Computerized Tomography in the Diagnosis and Treatment of Nonalcoholic Fatty Liver Disease 认领 引用 被引量：5
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作者 王南 董慧 +1 位作者 魏世超 陆付耳 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 2008年第3期295-298,共4页
In order to investigate the application of proton magnetic resonance spectroscopy （ill-MRS） and computerized tomography （CT） in the quantitative diagnosis of nonalcoholic fatty liver disease （NAFLD） and evaluati... In order to investigate the application of proton magnetic resonance spectroscopy （ill-MRS） and computerized tomography （CT） in the quantitative diagnosis of nonalcoholic fatty liver disease （NAFLD） and evaluation of therapeutic effects, 22 patients with NAFLD were selected according to the Chinese Medical Association＇s （CMA） standard of the NAFLD in comparison with 20 healthy volunteers （as control group）. Blood samples for biochemistry were collected. The severity of hepatosteatosis was evaluated by ^1H-MRS scan and CT scan of liver. The intrahepatic content of lipid （IHCL） and CT value ratio of liver to spleen were calculated. The patients in NAFLD group were treated with Ganzhixiao Capsule for 8 weeks. The changes in IHCL and CT value ratio of liver to spleen were observed before and after treatment. In NAFLD group serum ALT, TG, IHCL calculated by ^1HMRS were increased and CT value ratio of liver to spleen decreased significantly as compared with control group. After treatment for 8 weeks serum ALT, TG, IHCL were decreased significantly, while CT value ratio of liver to spleen increased significantly in NAFLD group. It was suggested that IHCL could be measured precisely by ^1HMRS. NAFLD was treated effectively by Ganzhixiao capsule. 展开更多
关键词 proton magnetic resonance spectroscopy computerized tomography nonalcoholic fatty liver disease
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Comments on the article about correlation between computerized tomography and surgery in acute pancreatitis 认领 引用 被引量：1
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作者 Enver Zerem Goran ImamoviC +1 位作者 Zoran Mavija Bahrija Haracic 《World Journal of Gastroenterology》 SCIE CAS CSCD 2011年第3期407-408,共2页
We read with great interest the article by Vege et al published in issue 34 of World J Gastroenterol 2010.The article evaluates the ability of contrast-enhanced computerized tomography(CECT)to characterize the nature ... We read with great interest the article by Vege et al published in issue 34 of World J Gastroenterol 2010.The article evaluates the ability of contrast-enhanced computerized tomography(CECT)to characterize the nature of peripancreatic collections found at surgery.The results of their study indicate that most of the peripancreatic collections seen on CECT in patients with severe acute pancreatitis who require operative intervention contain necrotic tissue and CECT has a limited role in differentiating various types of collections.However,there are some points that need to be addressed,including data about the stage of acute pancreatitis in which CECT was done and the time span between CECT examination and surgery. 展开更多
关键词 Acute pancreatitis Pancreatic necrosis Peripancreatic fluid collection Contrast-enhanced computerized tomography Surgery
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Study on sex differences and potential clinical value of threedimensional computerized tomography pelvimetry in rectal cancer patients 认领 引用 被引量：2
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作者 Xiao-Cong Zhou Fei-Yue Ke +2 位作者 Gaurav Dhamija Hao Chen Qiang Wang 《World Journal of Gastrointestinal Oncology》 SCIE 2024年第3期773-786,共14页
BACKGROUND Laparoscopic rectal cancer radical surgery is a complex procedure affected by various factors.However,the existing literature lacks standardized parameters for the pelvic region and soft tissues,which hampe... BACKGROUND Laparoscopic rectal cancer radical surgery is a complex procedure affected by various factors.However,the existing literature lacks standardized parameters for the pelvic region and soft tissues,which hampers the establishment of consistent conclusions.AIM To comprehensively assess 16 pelvic and 7 soft tissue parameters through computerized tomography(CT)-based three-dimensional(3D)reconstruction,providing a strong theoretical basis to address challenges in laparoscopic rectal cancer radical surgery.METHODS We analyzed data from 218 patients who underwent radical laparoscopic surgery for rectal cancer,and utilized CT data for 3D pelvic reconstruction.Specific anatomical points were carefully marked and measured using advanced 3D modeling software.To analyze the pelvic and soft tissue parameters,we emp-loyed statistical methods including paired sample t-tests,Wilcoxon rank-sum tests,and correlation analysis.RESULTS The investigation highlighted significant sex disparities in 14 pelvic bone parameters and 3 soft tissue parameters.Males demonstrated larger measurements in pelvic depth and overall curvature,smaller measurements in pelvic width,a larger mesorectal fat area,and a larger anterior-posterior abdominal diameter.By contrast,females exhibited wider pelvises,shallower depth,smaller overall curvature,and an increased amount of subcutaneous fat tissue.However,there were no significant sex differences observed in certain parameters such as sacral curvature height,superior pubococcygeal diameter,rectal area,visceral fat area,waist circumference,and transverse abdominal diameter.CONCLUSION The reconstruction of 3D CT data enabled accurate pelvic measurements,revealing significant sex differences in both pelvic and soft tissue parameters.This study design offer potential in predicting surgical difficulties and creating personalized surgical plans for male rectal cancer patients with a potentially“difficult pelvis”,ultimately improving surgical outcomes.Further research and utilization of these parameters could lead to enhanced surgical methods and patient care in laparoscopic rectal cancer radical surgery. 展开更多
关键词 Computerized tomography Rectal cancer Three-dimensional reconstruction Pelvimetry Sex differences
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Screening for lung cancer with chest computerized tomography: Is it cost efficient? 认领 引用
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作者 Tomasz Jaroslaw Szczesny Malgorzata Kanarkiewicz Janusz Kowalewski 《World Journal of Respirology》 2015年第2期160-165,共6页
Despite lung cancer(LC) screening by low-dose computerized tomography(LDCT) gaining many proponents worldwide, for many years it was not recognized as a life-prolonging and cost-effective procedure, until recently. Pr... Despite lung cancer(LC) screening by low-dose computerized tomography(LDCT) gaining many proponents worldwide, for many years it was not recognized as a life-prolonging and cost-effective procedure, until recently. Prospective observational studies had not been able to prove that this screening prolongs survival, but they helped to specify the inclusion and exclusion criteria. Long-awaited results of a prospective, randomized trial finally provided the evidence that LC screening with LDCT can prolong survival of the screened population. Several costeffectiveness analyses were performed to justify mass introduction of this screening. Results of these analyses are equivocal, although conclusions highly depend upon inclusion and exclusion criteria, methods of analysis and prices of medical procedures which differ between countries as well as the incidence of other pulmonary nodules, especially tuberculosis. Therefore, costeffectiveness analysis should be performed separately for every country. Cost-effectiveness depends especially upon the rate of false-positive results and the rate of unnecessary diagnostic, screening and treatment procedures. To ensure high cost-effectiveness, LC screening should be performed in accordance with screening protocol, in dedicated screening centers equipped with nodule volume change analysis, or as a prospective non-randomized trial, to ensure compliance with the inclusion and exclusion criteria. To ensure high cost-effectiveness of LC screening, future research should concentrate on determination of highrisk groups and further specifying the inclusion and exclusion criteria. 展开更多
关键词 Lung cancer Non-small cell lung cancers Screening Cost-effectiveness Computerized tomography Low-dose computerized tomography
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Detection of tracheal branching with computerized tomography:The relationship between the angles and age-gender 认领 引用 被引量：1
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作者 Şevket Kahraman Mesut Furkan Yazar +2 位作者 Hüseyin Aydemir Mecit Kantarci Sonay Aydin 《World Journal of Radiology》 2023年第4期118-126,共9页
BACKGROUND The data obtained on the anatomical knowledge of the tracheobronchial system can be used for diagnosis,treatment and interventional interventions in areas such as anesthesia,thoracic surgery,pulmonary physi... BACKGROUND The data obtained on the anatomical knowledge of the tracheobronchial system can be used for diagnosis,treatment and interventional interventions in areas such as anesthesia,thoracic surgery,pulmonary physiology.AIM To determine the tracheobronchial branching angles in pediatric and adult populations by using the multislice computed tomography(CT)and minimum intensity projection(MinIP)technique,which is a non-invasive method.METHODS Our study was carried out retrospectively.Patients who underwent contrast and non-contrast CT examination,whose anatomically and pathophysiologically good tracheobronchial system and lung parenchyma images were obtained,were included in the study.Measurements were made in the coronal plane of the lung parenchyma.In the coronal plane,right main bronchus-left main bronchus angle,right upper lobe bronchus-intermedius bronchus angle,right middle lobe bronchus-right lower lobe bronchus angle,left upper lobe bronchus-left lower lobe bronchus angle were measured.RESULTS The study population consisted of 1511 patients,753 pediatric(mean age:13.4±4.3;range:1-18 years)and 758 adults(mean age:54.3±17.3;range:19-94 years).In our study,tracheal bifurcation angle was found to be 73.3°±13.7°(59.6°-87°)in the whole population.In the pediatric group,the right-left main coronal level was found to be higher in boys compared to girls(74.6°±12.9°vs 71.2°±13.9°,P=0.001).In the adult group,the right-left main coronal level was found to be lower in males compared to females(71.9°±12.9°vs 75.8°±14.7°,P<0.001).CONCLUSIONS Our study,with the number of 1511 patients,is the first study in the literature with the largest number of patient populations including pediatric and adult demographic data,measuring the angle values of the tracheobronchial system using multislice CT and MinIP technique.Study data will not only be a guide during invasive procedures,but it can also guide studies to be done with imaging methods. 展开更多
关键词 Tracheobronchial branching angles Subcarinal angle Multislice computerized tomography Minimum intensity projection technique
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Positron emission tomography/computerized tomography in the evaluation of primary non-Hodgkin's lymphoma of prostate 认领 引用 被引量：7
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作者 Bo Pan Jian-Kui Han +1 位作者 Shi-Cun Wang Ao Xu 《World Journal of Gastroenterology》 SCIE CAS 2013年第39期6699-6702,共4页
Primary malignant lymphoma of the prostate is exceedingly rare.Here we report a case of a 65-year-old man who presented with increased urinary frequency,urinary urgency,and urinary incontinence for two years.Benign pr... Primary malignant lymphoma of the prostate is exceedingly rare.Here we report a case of a 65-year-old man who presented with increased urinary frequency,urinary urgency,and urinary incontinence for two years.Benign prostatic hypertrophy was suspected at primary impression.Ultrasound revealed a hypoechoic lesion of the prostate.The total serum prostate-specific antigen was within normal range.Positron emission tomography/computerized tomography(PET/CT)showed a hypermetabolic prostatic lesion.Prostate biopsy was consistent with a non-germinal center diffuse large B cell lymphoma.There was complete remission of the prostatic lesion following six cycles of chemotherapy as shown on the second PET/CT imaging.18F-fluoro-deoxy glucose PET/CT is not only a complement to conventional imaging,but also plays a significant role in the diagnosis and evaluation of treatment response of prostatic lymphoma. 展开更多
关键词 Fluoro-Deoxy-Glucose Positron emission tomography/computerized tomography Non-Hodgkin’s lymphoma Prostatic lymphoma Evaluation
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Validations of new cut-offs for surgical drains management and use of computerized tomography scan after pancreatoduodenectomy:The DALCUT trial 认领 引用
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作者 Damiano Caputo Alessandro Coppola +5 位作者 Vincenzo La Vaccara Roberto Passa Ludovico Carbone Massimo Ciccozzi Silvia Angeletti Roberto Coppola 《World Journal of Clinical Cases》 SCIE 2022年第15期4836-4842,共7页
BACKGROUND Postoperative pancreatic fistula(POPF)is the most fearful complication after pancreatic surgery and can lead to severe postoperative complications such as surgical site infections,sepsis and bleeding.A prev... BACKGROUND Postoperative pancreatic fistula(POPF)is the most fearful complication after pancreatic surgery and can lead to severe postoperative complications such as surgical site infections,sepsis and bleeding.A previous study which identified cut-offs of drains amylase levels(DALs)determined on postoperative day(POD)1 and POD3,was able to significantly predict POPF,abdominal collections and biliary fistulas,when related to specific findings detected at the abdominal computerized tomography(CT)scan routinely performed on POD3.AIM To validate the cut-offs of DALs in POD1 and POD3,established during the previous study,to assess the risk of clinically relevant POPF and confirm the usefulness of abdominal CT scan on POD3 in patients at increased risk of abdominal collection.METHODS The DALCUT trial is an interventional prospective study.All patients who will undergo pancreatoduodenectomy(PD)for periampullary neoplasms will be considered eligible.All patients will receive clinical staging and,if eligible for surgery,will undergo routine preoperative evaluation.After the PD,daily DALs will be evaluated from POD1.Drains removal and possible requirement of abdominal CT scans in POD3 will be managed on the basis of the outcome of DALs in the first three postoperative days.RESULTS This prospective study could validate the role of DALs in the management of surgical drains and in assessing the risk or relevant complications after PD.Drains could be removed in POD3 in case of POD1 DALs<666 U/L and POD3 DALs<207 U/L.In case of POD3 DALs≥252,abdominal CT scan will be performed in POD3 to identify abdominal collections≥5 cm.In this latter category of patients,drains could be maintained beyond POD3.CONCLUSION The results of this trial will contribute to a better knowledge of POPF and management of surgical drains. 展开更多
关键词 Pancreatic surgery Drains amylase Pancreatic fistula Postoperative complications Computerized tomography scan
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The Spleen and Sickle Cell Anemia: A Contrast Enhanced Computerized Tomography Based Study 认领 引用
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作者 Malaz Mohammed Ali Omer Ahmed Caroline Edward Ayad 《Open Journal of Radiology》 2016年第3期168-180,共13页
The spleen is one of the most frequently affected organs in sickle cell anemia (SCA). This study aims to characterize the spleen in sickle cell anemia patients using contrast enhanced computerized tomography scanning ... The spleen is one of the most frequently affected organs in sickle cell anemia (SCA). This study aims to characterize the spleen in sickle cell anemia patients using contrast enhanced computerized tomography scanning (CECT). 67 patients with SCA from different Saudi Arabian areas were enrolled;ages are ranged from 10 months to 28 years old. The spleen was assessed with CT for abdominal pain and/or unexplained fever. The evaluation was done at different contrast enhancement scanning phases. The study showed that the least number of affected patients was from Eastern Saudi Arabia (1.5%) followed by Asseer (16.4%) then Gazan representing 82.1%. The most common type of SCA affected the Saudi children is Hemoglobin SS Disease (Hb SS) constituting 41 (61.2%). The spleen size, lymph nodes size, spleen Hounsfield (HU), splenic vein diameter and the correlation with the associated findings were evaluated for all of the patients. In children affected with SCA: 26 (38.8%) have splenomegaly, 18 (26.9%) have atrophied spleen and 2 (3.0%) are with very small tissue like structure. Lesions found in the spleen were abscess, infarction, cyst, and calcifications. At the spleen hilum region;dilated splenic vein, presence of multiple collaterals, and thrombus were also been detected. Significantly correlations were noticed between lesions type, child age, enlargement of spleen and splenic lymph nodes at P ≤ 0.033, P ≤ 0.010 and P ≤ 0.012 respectively and showed an evidence that the reduction of the HU and advanced age have significant relation with changing of the spleen size at P ≤ 0.004 and P ≤ 0.000 respectively. Spleen lesions’ enhancement pattern is well emerged in both venous and delay phase and it was significantly related with the scanning phase at P ≤ 0.000 and with different types of SCA at P ≤ 0.037, and P ≤ 0.055 in venous and delay phase in respectively. CECT offers a number of morphological criteria that can be applied to differentiate hypodense lesions of the spleen in SCA. CT characterization criteria of hypodense splenic lesions are acknowledged to aid interpretation during evaluation of abdominal CT images of the spleen in symptomatic patients with sickle cell anemia. 展开更多
关键词 Spleen Sickle Cell Disease Computerized Tomography
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Diagnostic Evaluation of Pulmonary Embolism: A Computerized Tomography Based Study 认领 引用
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作者 Salah Eldein Hassan Aloub Caroline Edward Ayad 《Open Journal of Radiology》 2016年第3期157-167,共11页
Pulmonary embolism (PE) is potentially life threatening condition which requires adequate diagnosis. Since computerized tomography pulmonary angiography (CTPA) described the presence of a clot subjectively, an objecti... Pulmonary embolism (PE) is potentially life threatening condition which requires adequate diagnosis. Since computerized tomography pulmonary angiography (CTPA) described the presence of a clot subjectively, an objective and quantification method to characterize plural parenchymal abnormality, pulmonary vessels and heart is needed (in order to diagnose PE). This study was directed to investigate whether the presence of plural parenchymal findings correlates with the PE and as well, it was designed to answer two basic questions based on CTPA findings done for clinical suspicion of PE: firstly, what are the plural parenchymal abnormalities associated with PE;secondly, correlation of PE with the presence of heart changes and pulmonary vessels measurements. CTPA scans were acquired for 55 patients suspected of having PE and another 50 subjects who were considered as control. The clinical signs and pleuroparenchymal abnormalities, pulmonary artery tree measurements, right ventricle and atrium diameters, Inter ventricular septum width as well as the myocardium thickening were characterized and correlated with PE. The results showed that the PE patients group has more dilated measurements than the normal control subjects. The right ventricle diameter changes were found to be significantly related to the presence of PE at p ≤ 0.001. Significant changes at p ≤ 0.005 were also noticed in the pulmonary trunk diameter as well as the right and left main pulmonary arteries with no significant changes detected in the distal portion of both pulmonary arteries diameters. The common complaints from PE patients were chest pain, shortness of breathing, lower limb swelling, tachycardia and syncope. Consolidation, ground glass opacifications, mosaic, right ventricle morphological changes and pleural effusion were present in the majority of patients undergoing CTPA for the clinical suspicion of PE. CTPA is considered as the diagnostic modality of choice in characterization of pulmonary vessels, atrium and ventricle changes as well as pleura parenchymal abnormalities in patients with or without PE. 展开更多
关键词 Pulmonary Embolism Computerized Tomography Pulmonary Angiography Pleuroparenchymal Abnormalities
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The possible value of ~18F-FDG positron emission tomography/computerized tomography imaging in detection of atherosclerotic plaque 认领 引用
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作者 Jianwei Yuan Yanlin Feng +1 位作者 Lingxiao Fan Xiaohong He 《Journal of Nanjing Medical University》 2008年第1期61-65,共5页
Objective：To evaluate the clinical value with positron emission tomography/computerized tomography（PET/CT） imaging for the detection of vulnerable plaque in atherosclerotic lesions. Methods：Sixty people with a age... Objective：To evaluate the clinical value with positron emission tomography/computerized tomography（PET/CT） imaging for the detection of vulnerable plaque in atherosclerotic lesions. Methods：Sixty people with a age of over 60[mean age （69.2 ± 7.1）years] underwent three dimension（3D） whole-body fluorine-18-2-fluoro-2-deoxy-D-glucose（^18F-FDG） PET/CT imaging and were evaluated retrospectively, including 6 cases assessed as normal and 54 cases with active atherosclerotic plaque. Fifty-four cases with SUVs and CT values in the aortic wall of high-FDG-uptake were measured retrospectively. These high-FDG-uptake cases in the aortic wall were divided into three groups according their CT value. Cases in group 1 had high uptake in atherosclerotic lesions of the aortic wall with CT value of less than 60 Hu（soft plaque）. Cases in group 2 had high uptake with CT value between 60-100 Hu （intermediate plaque）, Cases in group 3 had high uptake with CT value more than 100 Hu（calcified plaque）, Group 4 was normal. Results： In group 1, there were 42 high-FDG-uptake sites （average SUV 1.553 ± 0.486）. In group 2, there were 30 high-FDG-uptake sites（average SUV 1.393 ± 0.296）. In group 3, there were 36 high-FDG-uptake sites（average SUV 1.354 ± 0.189）. In group 4, there were 33 normal-FDG-uptake sites （average SUV was 1.102 ± 0.141）, The SUVs showed significant difference among the four groups（F = 678.909, P = 0.000）. There were also significant difference found between the normal-FDG-uptake group and the high-FDG-uptake groups（P = 0.000, 0.000, 0.001, respectively）. Conclusion：Different degrees of ^18F-FDG uptake in active large atherosclerotic plaque were shown in different stages of atherosclerotic plaque formation. The soft plaque had the highest FDG uptake in this study. This suggested that ^18F- FDG PET/CT imaging may be of great potential value in early diagnosis and monitoring of vulnerable soft plaque in atherosclerotic lesions. 展开更多
关键词 fluorine-18-2-fluoro-2-deoxy-D-glucose positron-emission tomography computerized, tomography atherosclerosis vulnerable plaque
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Corrigendum to"Prediction of traumatic avascular necrosis of the femoral head by single photon emission computerized tomography and computerized tomography:An experimental study in dogs"[Chin J Traumatol 14(2011)227-232,6] 认领 引用
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作者 Feng Shen Zuo-Qin Yan +5 位作者 Chang-An Guo Hong-Cheng Shi Yu-Shen Gu Meng-Su Zeng Xiao-Yu Lu Jun Liu 《Chinese Journal of Traumatology》 CAS CSCD 2025年第6期517-517,共1页
The authors regret<Some overlap was found between Fig.7A and E.No bone necrosis occurred in Group A(Fig.7A)and the normal control(Fig.7E).The correct Fig.7A is shown below.The authors apologize for this error and t... The authors regret<Some overlap was found between Fig.7A and E.No bone necrosis occurred in Group A(Fig.7A)and the normal control(Fig.7E).The correct Fig.7A is shown below.The authors apologize for this error and the correction does not significantly impact the conclusions of the paper. 展开更多
关键词 femoral head experimental study computerized tomography dogs single photon emission computerized tomography bone necrosis traumatic avascular necrosis
Assessment of Effect of Shexiang Baoxin Pill for Labour Angina Pectoris Patients with Computerized Tomography Myocardial Imaging 认领 引用
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作者 齐华阁 朱永春 +1 位作者 许彩茹 郝玉明 《Chinese Journal of Integrative Medicine》 CAS 1998年第2期146-146,共1页
Objective:To assess the effect of Shexiang Baoxin Pill（SXBXP）for labour angina pectoris.Methods:Effect of 66 patientstreated withconven tional treatment or conventional treatment plus SXBXP were observed and compare... Objective:To assess the effect of Shexiang Baoxin Pill（SXBXP）for labour angina pectoris.Methods:Effect of 66 patientstreated withconven tional treatment or conventional treatment plus SXBXP were observed and compared with99m TC-MIBI singlepho tonemissi on computerized tomography（SPECT）target cardiograph to estimate is chemia my ocardial area.Results:The total effectiverate was much higher in patients treated with SXBXP than that in patients treated with conventional treatment only（87.8%vs.56%,P＜0.05）.The effective rate on ECG in the two group swas 70.7% and 52%respectively,with out significant statistical difference between them（P＞0.05）.While significant difference was observed in is chemiaarea of my ocardiali mage between the two groups after treatment,18.2±8.2%vs23.8±9.8%,P<0.05.Moreover,there currence of anginapect or is and cardiaceven twerealsolessin the SXBXPgroup.Conclusion:the SXBXP was effective for labourangina pectoris. 展开更多
关键词 Assessment of Effect of Shexiang Baoxin Pill for Labour Angina Pectoris Patients with Computerized Tomography Myocardial Imaging
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A new solid-conversion gas detector for high energy X-ray industrial computed tomography 认领 引用
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作者 周日峰 陈伟民 段晓礁 《Optoelectronics Letters》 EI 2011年第5期337-340,共4页
A new type of solid-conversion gas detector is investigated for high energy X-ray industrial computed tomography (HECT). The conversion efficiency is calculated by using the EGSnrc Monte Carlo code on the Linux platfo... A new type of solid-conversion gas detector is investigated for high energy X-ray industrial computed tomography (HECT). The conversion efficiency is calculated by using the EGSnrc Monte Carlo code on the Linux platform to simulate the transport process of photons and electrons in the detector. The simulation results show that the conversion efficiency could be more than 65%, if the X-ray beam width is less than about 0.2 mm, and a tungsten slab with 0.2 mm thickness and 30 mm length is employed as a radiation conversion medium. Meanwhile the results indicate that this new detector has higher conversion efficiency as well as less volume. Theoretically this new kind of detector could take place of the traditional scintillation detector for HECT. 展开更多
关键词 Computer operating systems Computerized tomography Conversion efficiency Gas detectors High energy physics Multiphoton processes Tungsten X rays
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Early detection of response to imatinib therapy for gastrointestinal stromal tumor by using 18F-FDG-positron emission tomography and computed tomography imaging 认领 引用 被引量：7
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作者 Sabri Zincirkeser Alper Sevinc +1 位作者 M Emin Kalender Celalettin Camci 《World Journal of Gastroenterology》 SCIE CAS 2007年第15期2261-2262,共2页
A 41-year old female with metastatic gastrointestinal stromal tumor was referred to 18F-FDG-positron emission tomography and computed tomography （PET/CT） scan before and after one-month treatment with imatinib （Gli... A 41-year old female with metastatic gastrointestinal stromal tumor was referred to 18F-FDG-positron emission tomography and computed tomography （PET/CT） scan before and after one-month treatment with imatinib （Glivec, Gleevec, Novartis, Basel, Switzerland）, a tyrosine kinase inhibitor （400 mg/d）. Metabolic response was evaluated before and after one month of therapy. The decrease of the maximum standardised uptake value （SUV） was 79% （from 9.8 to 2.1）. Positron emission tomography demonstrated complete metabolic response after one-month of imatinib treatment. Additionally, the previous lesion was compared with the coronal computerized tomographic image. There was no difference in the size of the tumor before and after therapy according to CT images. However, metabolic activity was inhibited. 18F-FDG-PEr is a valuable method for the detection of response to one-month imatinib treatment in patients with gastrointestinal stromal tumors. 展开更多
关键词 18F-fluorodeoxyglucose Positron emission tomography Computerized tomography Gastrointestinal stromal tumor Imatinib
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Pancreatic volume change using three dimensional-computed tomography volumetry and its relationships with diabetes on longterm follow-up in autoimmune pancreatitis 认领 引用 被引量：2
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作者 Ryuichi Shimada Yasunari Yamada +5 位作者 Kazuhisa Okamoto Kazunari Murakami Mitsuteru Motomura Hajime Takaki Kengo Fukuzawa Yoshiki Asayama 《World Journal of Radiology》 2024年第11期644-656,共13页
BACKGROUND Several studies found that early pancreatic atrophy detected by computed tomo-graphy(CT)within 6 months was associated with a high incidence of diabetes in patients with type-1 autoimmune pancreatitis(AIP)r... BACKGROUND Several studies found that early pancreatic atrophy detected by computed tomo-graphy(CT)within 6 months was associated with a high incidence of diabetes in patients with type-1 autoimmune pancreatitis(AIP)receiving steroid therapy;however,no long-term follow-up studies have been performed.AIM To investigate pancreatic volume(PV)changes using three dimensional(3D)-CT volumetry and their relationship with IgG4 and diabetes in patients with AIP.METHODS This retrospective study included 33 patients with type-1 AIP receiving steroid therapy.Patients were divided into diffuse(D-type)and mass-forming type(M-type)AIP.PV was determined by semi-automated 3D-CT volumetry,and changes between initial and follow-up values were calculated.The relationship between PV and serum IgG4 levels was analyzed by Spearman’s rank correlation.The PV atrophy ratio compared with the presumed normal PV at the time of last follow-up CT and its relationship with diabetes were investigated.RESULTS There were 16 D-type and 17 M-type patients with long-term follow-up(mean,95.8 months).The regression curve of mean relative PV change reduced exponentially and rapidly during the first 25 months and then more slowly in both groups.The overall cumulative pancreas re-enlargement rates at 1,3,5,7 and 10 years were 6.1%,12.2%,29.2%,47.5%and 55.0%,respectively.There was a moderate-to-very strong positive correlation(ρ≥0.4)between PV and serum IgG4 levels in nine(9/13,69.2%)patients.All 33 patients showed pancreatic atrophy(mean 59.3%)after long-term follow-up.Patients with D-type AIP had a significantly higher atrophy rate and higher incidence of diabetes than M-type patients(P<0.05).CONCLUSION PV change initially reduced exponentially and then more slowly and is considered an important factor associated with diabetes.Serum IgG4 levels were positively correlated with PV during follow-up. 展开更多
关键词 Autoimmune pancreatitis Computerized tomography volumetry Follow-up study IgG4 Diabetes
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Use of the vertebrae and iliac bone as references for localizing the appendix vermiformis in computed tomography 认领 引用
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作者 Muhsin Ozgun Ozturk Mustafa Resorlu +1 位作者 Sonay Aydin Kemal Bugra Memis 《World Journal of Radiology》 2024年第11期629-637,共9页
BACKGROUND The appendix vermiformis is a part of the gastrointestinal tract,situated in the lower right quadrant of the abdomen.Acute appendicitis,acute inflammation of the appendix vermiformis,is the most common caus... BACKGROUND The appendix vermiformis is a part of the gastrointestinal tract,situated in the lower right quadrant of the abdomen.Acute appendicitis,acute inflammation of the appendix vermiformis,is the most common cause of acute abdomen requiring surgical intervention.Although computed tomography(CT)offers high diagnostic efficacy in assessing the appendix across various anatomical positions,it also involves radiation exposure.Reducing exposure factors and narrowing the field of view(FOV)are ways to decrease the radiation dose to the patient.To narrow the FOV,appendix locations within the population must be defined using metric markers.AIM To determine the location of the appendix vermiformis on CT using the vertebrae and the right iliac bone as anatomical landmarks.METHODS This retrospective study examined 470 patients presenting with abdominal pain who underwent abdominal CT scans between January 01,2015 and January 01,2018.Forty-three patients were excluded due to various reasons.The most superior and inferior points and the origin of the appendix were measured separately in relation to the vertebrae and right iliac bone for localization.The population was divided into normal and acute appendicitis groups,and the relationship between appendix location and anthropometric parameters relationship was examined.P values below 0.05 were considered statistically significant.RESULTS The final analysis included 427 adult patients(206 females and 221 males)with a mean age of 42.1±19.5 years.An ascending appendix course was the most common(90.4%).The appendix ranged from the L2 vertebral body level to the coccygeal vertebral level relative to the vertebrae.The appendix ranged between(−)140.5 mm and(+)87.4 mm relative to the right iliac bone.A negative correlation was found between patient age,height,body mass index,and the highest and lowest points of the appendix in regard to the vertebrae.CONCLUSION The study’s findings unveiled the locations of the appendix in the population in relation to the bony anatomical landmarks.These data can be used as the basis for future research aimed at reducing patient exposure to ionizing radiation. 展开更多
关键词 Appendix Computerized tomography Vertebrae Ionizing radiation Ilium
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Effect of age on computed tomography findings:Specificity and sensitivity in coronavirus disease 2019 infection 认领 引用
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作者 Erdal Karavas Edhem Unver +5 位作者 Sonay Aydın Gonul Seven Yalcin Erdem Fatihoglu Ufuk Kuyrukluyildiz Yusuf Kemal Arslan Mustafa Yazici 《World Journal of Virology》 2022年第5期331-340,共10页
BACKGROUND Coronavirus disease 2019(COVID-19)is a pandemic caused by the severe acute respiratory syndrome coronavirus in 2019.Although the real-time reverse transcription PCR test for viral nucleic acids is the gold ... BACKGROUND Coronavirus disease 2019(COVID-19)is a pandemic caused by the severe acute respiratory syndrome coronavirus in 2019.Although the real-time reverse transcription PCR test for viral nucleic acids is the gold standard for COVID-19 diagnosis,computed tomography(CT)has grown in importance.AIM To evaluate the sensitivity and specificity of thoracic CT findings of COVID-19 pneumonia according to age groups.METHODS PCR and CT results from 411 patients were reviewed.The diagnosis of COVID-19 pneumonia was made by three radiologists.Lymphadenopathy,pericardial effusion,pleurisy,pleural thickening,pleural effusion,location features of the lesions,ground glass,consolidation,air bronchogram,vascular enlargement,bronchial dilatation,halo finding,inverted halo sign,nodularity,air bubble,subpleural band(curvilinear density),reticular density,crazy paving pattern,and fibrosis findings were recorded.The patients were divided into nine groups by decades while calculating the sensitivity,specificity,and diagnostic efficacy for CT positivity.RESULTS The mean age of the cases was 48.1±22.7 years.The CT finding with the highest diagnostic power was ground glass.Vascular enlargement and bronchial dilatation followed ground glass.Pericardial effusion was the finding with the lowest diagnostic accuracy.The incidence of lymphadenopathy,pleurisy,pleural thickening,peripheral localization,bilateral,ground glass,vascular enlargement,bronchial dilatation,subpleural band,reticular density,crazy paving appearance,and fibrosis all increased increase significantly with age in patients with positive real-time reverse transcription PCR test.CONCLUSION There are few publications comparing sensitivity and specificity of thoracic CT findings according to age.In cases of COVID-19 pneumonia,there is an increase in the variety and frequency of CT findings with age,and parallel to this the sensitivity and specificity of the findings increase.COVID-19 cases in the pediatric age group have fewer lung findings than adults,and this situation decreases the diagnostic value of CT in pediatric patients. 展开更多
关键词 Thoracic computerized tomography SARS-CoV-2 COVID-19 Diagnosis Pediatric age
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Characterizing disintegrated dolomite pore structure and seepage:CT scanning and numerical approach 认领 引用 被引量：1
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作者 Jiaxing Dong Peixuan Dai +2 位作者 Wenlian Liu Hanhua Xu Sugang Sui 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2025年第7期4386-4399,共14页
Disintegrated dolomite slope and tunnel disasters occur frequently due to poor water stability of disintegrated dolomite,primarily in a form of seepage failure.For engineering purposes,it is critical to determine the ... Disintegrated dolomite slope and tunnel disasters occur frequently due to poor water stability of disintegrated dolomite,primarily in a form of seepage failure.For engineering purposes,it is critical to determine the seepage properties of disintegrated dolomite within the strata.However,conventional experimental methods are time-consuming and expensive and may not be effective in investigating seepage characteristics due to the heterogeneity of disintegrated dolomite.In this study,pore network model(PNM)was established by the computerized tomography(CT)scanning technology to characterize the pores.Meanwhile,the seepage and coefficient of permeability under different inlet stress conditions based on the accurate pore model were realized by linking the commercial image processing software Avizo with the commercial multi-physics modeling package Comsol.The results show that the porosities of severely and completely disintegrated dolomites are 29.17% and 45.37%,respectively.The grade of pore development increases with disintegration grade,which facilitates seepage failure.Severely and completely disintegrated dolomites have the coefficients of permeability of 9.67×10-7 m/s and 1.61×10-6 m/s,respectively.Under conventional conditions,severely and completely disintegrated dolomites undergo seepage failure above a pressure difference of 6×103 Pa and 5×103 Pa,respectively.These results are consistent with both in situ water pressure tests in the borehole and laboratory tests with the constant-head method,demonstrating that CT scanning is an effective method for observing fractures and pores in disintegrated dolomite for seepage evaluation. 展开更多
关键词 Disintegrated dolomite X-ray computerized tomography(CT) Pore network model(PNM) Seepage simulation
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