ISRN radiology最新文献_第3页

Usefulness of the bolus-tracking baseline scan for the diagnosis of hepatic steatosis in abdominal computed tomography: a feasibility study. 在腹部计算机断层扫描中，剂量追踪基线扫描诊断肝脂肪变性的有效性:一项可行性研究。

ISRN radiology Pub Date : 2013-04-27 eCollection Date: 2013-01-01 DOI: 10.5402/2013/147632

J Gossner, S Schäfer

{"title":"Usefulness of the bolus-tracking baseline scan for the diagnosis of hepatic steatosis in abdominal computed tomography: a feasibility study.","authors":"J Gossner, S Schäfer","doi":"10.5402/2013/147632","DOIUrl":"10.5402/2013/147632","url":null,"abstract":"Nonalcoholic fatty liver disease (NAFLD) is a common pathology in western societies. Unenhanced computed tomography (CT) of the liver is a valuable tool in determining the presence of steatosis hepatis, but in most departments standard CT protocols of abdomen often do not include unenhanced scans anymore. In a small series of 22 patients the liver density was measured in the acquired low-dose baseline scan for bolus tracking and was compared to the measurement in a regular unenhanced CT scan of the upper abdomen. The mean difference between the unenhanced CT scan and the low-dose baseline scan was 3.4 HU (range 0.2-8.6 HU); the difference between these two scans was 5 HU or smaller in 82% of the patients. There was a significant difference between the two used CT scanners; this has to be kept in mind before implementing this approach into daily practice. All but one patient with fatty liver disease on unenhanced CT were diagnosed using the baseline scan. The baseline scan for bolus tracking may be useful for the diagnosis or in the followup of fatty liver disease. ","PeriodicalId":90195,"journal":{"name":"ISRN radiology","volume":"2013 ","pages":"147632"},"PeriodicalIF":0.0,"publicationDate":"2013-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4045524/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32450692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Retrievable inferior vena cava filters for venous thromboembolism. 可回收下腔静脉过滤器用于静脉血栓栓塞。

ISRN radiology Pub Date : 2013-04-22 eCollection Date: 2013-01-01 DOI: 10.5402/2013/959452

Han Ni, Lei Lei Win

引用次数: 16

Investigating γ H2AX as a Biomarker of Radiosensitivity Using Flow Cytometry Methods. 利用流式细胞术研究γ H2AX作为放射敏感性的生物标志物。

ISRN radiology Pub Date : 2013-04-10 eCollection Date: 2013-01-01 DOI: 10.5402/2013/704659

Lindsay A Beaton, Leonora Marro, Shawn Malone, Sara Samiee, Scott Grimes, Kyle Malone, Ruth C Wilkins

{"title":"Investigating γ H2AX as a Biomarker of Radiosensitivity Using Flow Cytometry Methods.","authors":"Lindsay A Beaton, Leonora Marro, Shawn Malone, Sara Samiee, Scott Grimes, Kyle Malone, Ruth C Wilkins","doi":"10.5402/2013/704659","DOIUrl":"https://doi.org/10.5402/2013/704659","url":null,"abstract":"Background and Purpose. This project examined the in vitro γ H2AX response in lymphocytes of prostate cancer patients who had a radiosensitive response after receiving radiotherapy. The goal of this project was to determine whether the γ H2AX response, as measured by flow cytometry, could be used as a marker of individual patient radiosensitivity. Materials and Methods. Patients were selected from a randomized clinical trial evaluating the optimal timing of Dose Escalated Radiation and short-course Androgen Deprivation Therapy. Of 438 patients, 3% developed Grade 3 late radiation proctitis and were considered to be radiosensitive. Blood was drawn from 10 of these patients along with 20 matched samples from patients with Grade 0 proctitis. Dose response curves up to 10 Gy along with time response curves after 2 Gy (0-24 h) were generated for each sample. The γ H2AX response in lymphocytes and lymphocyte subsets was analyzed by flow cytometry. Results. There were no significant differences between the radiosensitive and control samples for either the dose course or the time course. Conclusions. Although γ H2AX response has previously been demonstrated to be an indicator of individual patient radiosensitivity, flow cytometry lacks the sensitivity necessary to distinguish any differences between samples from control and radiosensitive patients. ","PeriodicalId":90195,"journal":{"name":"ISRN radiology","volume":"2013 ","pages":"704659"},"PeriodicalIF":0.0,"publicationDate":"2013-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4045522/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32456117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Hemosuccus Pancreaticus: 15-Year Experience from a Tertiary Care GI Bleed Centre. 胰脏出血:三级护理胃肠道出血中心15年的经验。

ISRN radiology Pub Date : 2013-02-28 eCollection Date: 2013-01-01 DOI: 10.5402/2013/191794

Ashwin Rammohan, Ravichandran Palaniappan, Sukumar Ramaswami, Senthil Kumar Perumal, Anand Lakshmanan, U P Srinivasan, Ravi Ramasamy, Jeswanth Sathyanesan

{"title":"Hemosuccus Pancreaticus: 15-Year Experience from a Tertiary Care GI Bleed Centre.","authors":"Ashwin Rammohan, Ravichandran Palaniappan, Sukumar Ramaswami, Senthil Kumar Perumal, Anand Lakshmanan, U P Srinivasan, Ravi Ramasamy, Jeswanth Sathyanesan","doi":"10.5402/2013/191794","DOIUrl":"https://doi.org/10.5402/2013/191794","url":null,"abstract":"Background. Hemosuccus pancreaticus (HP) is a very rare and obscure cause of upper gastrointestinal bleeding. Due to its rarity, the diagnostic and therapeutic strategy for the management of this potentially life threatening problem remains undefined. The objective of our study is to highlight the challenges in the diagnosis and management of HP and to formulate a protocol to effectively and safely manage this condition. Methods. We retrospectively reviewed the records of all patients who presented with HP over the last 15 years at our institution between January 1997 and December 2011. Results. There were a total of 51 patients with a mean age of 32 years. Nineteen patients had chronic alcoholic pancreatitis; twenty-six, five, and one patient had tropical pancreatitis, acute pancreatitis, and idiopathic pancreatitis, respectively. Six patients were managed conservatively. Selective arterial embolization was attempted in 40 of 45 (89%) patients and was successful in 29 of the 40 (72.5%). 16 of 51 (31.4%) patients required surgery. Overall mortality was 7.8%. Length of followup ranged from 6 months to 15 years. Conclusions. Upper gastrointestinal bleeding in a patient with a history of chronic pancreatitis could be caused by HP. All hemodynamically stable patients with HP should undergo prompt initial angiographic evaluation, and if possible, embolization. Hemodynamically unstable patients and those following unsuccessful embolization should undergo emergency haemostatic surgery. Centralization of GI bleed services along with a multidisciplinary team approach and a well-defined management protocol is essential to reduce the mortality and morbidity of this condition. ","PeriodicalId":90195,"journal":{"name":"ISRN radiology","volume":"2013 ","pages":"191794"},"PeriodicalIF":0.0,"publicationDate":"2013-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4045512/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32450693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 59

Automated determination of bone age in a modern chinese population. 现代中国人群骨龄的自动测定。

ISRN radiology Pub Date : 2013-02-25 eCollection Date: 2013-01-01 DOI: 10.5402/2013/874570

Shao-Yan Zhang, Gang Liu, Chen-Guo Ma, Yi-San Han, Xun-Zhang Shen, Rui-Long Xu, Hans Henrik Thodberg

{"title":"Automated determination of bone age in a modern chinese population.","authors":"Shao-Yan Zhang, Gang Liu, Chen-Guo Ma, Yi-San Han, Xun-Zhang Shen, Rui-Long Xu, Hans Henrik Thodberg","doi":"10.5402/2013/874570","DOIUrl":"https://doi.org/10.5402/2013/874570","url":null,"abstract":"Rationale and Objective. Large studies have previously been performed to set up a Chinese bone age reference, but it has been difficult to compare the maturation of Chinese children with populations elsewhere due to the potential variability between raters in different parts of the world. We re-analysed the radiographs from a large study of normal Chinese children using an automated bone age rating method to establish a Chinese bone age reference, and to compare the tempo of maturation in the Chinese with other populations. Materials and Methods. X-rays from 2883 boys and 3143 girls aged 2-20 years from five Chinese cities, taken in 2005, were evaluated using the BoneXpert automated method. Results. Chinese children reached full maturity at the same age as previously studied Asian children from Los Angeles, but 0.6 years earlier than Caucasian children in Los Angeles. The Greulich-Pyle bone age method was adapted to the Chinese population creating a new bone age scale BX-China05. The standard deviation between BX-China05 and chronologic age was 1.01 years in boys aged 8-14, and 1.08 years in girls aged 7-12. Conclusion. By eliminating rater variability, the automated method provides a reliable and efficient standard for bone age determination in China. ","PeriodicalId":90195,"journal":{"name":"ISRN radiology","volume":"2013 ","pages":"874570"},"PeriodicalIF":0.0,"publicationDate":"2013-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5402/2013/874570","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32456118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 29

Imaging of focal autoimmune pancreatitis and differentiating it from pancreatic cancer. 局灶性自身免疫性胰腺炎的影像学与胰腺癌的鉴别

ISRN radiology Pub Date : 2013-01-16 eCollection Date: 2013-01-01 DOI: 10.5402/2013/569489

Abhishek Vijayakumar, Avinash Vijayakumar

引用次数: 14

Comparison of hippocampal volume in dementia subtypes. 痴呆亚型海马体积的比较。

ISRN radiology Pub Date : 2012-12-02 eCollection Date: 2013-01-01 DOI: 10.5402/2013/174524

Avinash Vijayakumar, Abhishek Vijayakumar

引用次数: 44

Ultrasonographic features of kidney transplants and their complications: an imaging review. 肾移植的超声特征及其并发症:影像学回顾。

ISRN radiology Pub Date : 2012-12-02 eCollection Date: 2013-01-01 DOI: 10.5402/2013/480862

Chrysafoula Kolofousi, Konstantinos Stefanidis, Demosthenes D Cokkinos, Dimitrios Karakitsos, Eleni Antypa, Ploutarhos Piperopoulos

引用次数: 53

An adrenal incidentaloma: how often is it detected and what are the consequences? 肾上腺偶发瘤:多久发现一次，后果是什么?

ISRN radiology Pub Date : 2012-11-28 eCollection Date: 2013-01-01 DOI: 10.5402/2013/871959

E M Minnaar, K E Human, D Henneman, C Y Nio, P H Bisschop, E J M Nieveen van Dijkum

{"title":"An adrenal incidentaloma: how often is it detected and what are the consequences?","authors":"E M Minnaar, K E Human, D Henneman, C Y Nio, P H Bisschop, E J M Nieveen van Dijkum","doi":"10.5402/2013/871959","DOIUrl":"https://doi.org/10.5402/2013/871959","url":null,"abstract":"Objectives. The aim of this study was to investigate the detection rate of adrenal incidentalomas and subsequent workup. Design. Retrospective cohort study. Methods. Two investigators evaluated the adrenals on abdominal CT scans. Abnormalities were compared to the original radiology reports and an experienced abdominal radiologist reviewed the CT scans. All additional imaging and laboratory tests were assessed. Results. The investigators detected 44/356 adrenal incidentalomas (12%). In 25 patients an adrenal incidentaloma had been noted in the radiology report. The expert radiologist agreed on 19 incidentalomas in 17 patients, two with bilateral incidentalomas. Of the 25 incidentaloma patients, 4 (16%) patients were screened for hormonal overproduction and 2 (8%) patients had follow-up imaging studies. Conclusions. 12% of the patients had an adrenal incidentaloma (42 of 356). 17 (40%) had initially not been reported by the radiologist. When diagnosed with an adrenal incidentaloma, only a small percentage of patients (16%) is screened or undergoes repeated imaging (8%) as proposed in the National Institutes of Health (NIH) guidelines on adrenal incidentalomas. ","PeriodicalId":90195,"journal":{"name":"ISRN radiology","volume":"2013 ","pages":"871959"},"PeriodicalIF":0.0,"publicationDate":"2012-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4045521/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32458245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Feasibility of detecting pulmonary embolism using noncontrast MRI. 非对比MRI检测肺栓塞的可行性。

ISRN radiology Pub Date : 2012-11-28 eCollection Date: 2013-01-01 DOI: 10.5402/2013/729271

C S Mudge, T T Healey, M K Atalay, J A Pezzullo

{"title":"Feasibility of detecting pulmonary embolism using noncontrast MRI.","authors":"C S Mudge, T T Healey, M K Atalay, J A Pezzullo","doi":"10.5402/2013/729271","DOIUrl":"https://doi.org/10.5402/2013/729271","url":null,"abstract":"Purpose. The purpose of this study was to evaluate the feasibility of detecting pulmonary emboli utilizing noncontrast magnetic resonance imaging techniques in patients with known pulmonary embolism. Materials and Methods. Eleven patients were enrolled in a study to evaluate right ventricular function by cardiac MRI in patients diagnosed with acute pulmonary embolism on CT pulmonary angiogram. Cardiac MRI was performed as soon as possible following pulmonary embolism detection. Two independent observers reviewed the precontrast portion of each MRI, scoring right, left, and lobar arteries as positive or negative for PE. The CTs were reviewed and interpreted in the same manner. Results. MRI was obtained on average of 40 hours after the CT. Forty-eight vessels were affected by PE on CT, 69% of which were identified on MRI. All eight pulmonary emboli located in the right or left pulmonary arteries were detected on MRI. Of the 15 pulmonary emboli that were not detected on MRI, 7 were subsegmental, 6 were segmental, and 2 were located in a branch not included in the MRI field of view. Conclusions. Most pulmonary emboli detected on CT were identified on noncontrast MRI, even though our MRI protocol was not optimized for pulmonary artery visualization. ","PeriodicalId":90195,"journal":{"name":"ISRN radiology","volume":"2013 ","pages":"729271"},"PeriodicalIF":0.0,"publicationDate":"2012-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4045508/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32458243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12