The Internet Journal of Radiology最新文献_第3页

Appendico-Vaginal Fistula – A Rare Complication Of Appendicitis 阑尾阴道瘘——阑尾炎的一种罕见并发症

The Internet Journal of Radiology Pub Date : 2012-01-24 DOI: 10.5580/2aa9

P. Chatra, S. VinayakaU

引用次数: 3

Uniqueness Of Refractive Index As An Effective Diagnostic Parameter For Brain Lesions: A Novel Noninvasive Technique To Predict Refractive Index From CT-MR Fusion Image By Applying Feynman’s Equation 折射率作为脑病变有效诊断参数的独特性:一种应用费曼方程预测CT-MR融合图像折射率的无创新技术

The Internet Journal of Radiology Pub Date : 2012-01-24 DOI: 10.5580/2afa

T. Biswas, S. Ramadan, S. Ghosh, Rabi N. Bhattacharya

{"title":"Uniqueness Of Refractive Index As An Effective Diagnostic Parameter For Brain Lesions: A Novel Noninvasive Technique To Predict Refractive Index From CT-MR Fusion Image By Applying Feynman’s Equation","authors":"T. Biswas, S. Ramadan, S. Ghosh, Rabi N. Bhattacharya","doi":"10.5580/2afa","DOIUrl":"https://doi.org/10.5580/2afa","url":null,"abstract":"PURPOSE – The refractive index (RI) is a unique physical property of tissue. It changes in neoplastic and inflammatory condition of brain due to depletion of tissue glutathione concentration changing the electron density. The purpose of the study was to predict RI value of the brain lesions from the CT-MR fused images non invasively. MATERIALS AND METHODS –CTMR fusion image was produced by combining CT and MR images by rigid registration technique to detect the pathology accurately. Independent component analysis determines the color value and gray value of the images of the tissue. These values were then used by Neural Network software to generate a color mapping of the CT-MR fusion image. Electron density derived from CT images and optical frequency from color image were used to determine RI value by applying Feynman’s equation. RI value and glutathione levels of corresponding biopsy specimens were determined in the laboratory. RESULTS –.A colored CT-MR fusion image shows true color of the tissue. The RI values determined from images were in agreement with biopsy determined RI values. Values between 1.353 through 1.359 are benign and RI value above 1.412 were found malignant.CONCLUSIONPredicting RI value using colored CT-MR fused images will increase diagnostic accuracy.","PeriodicalId":22526,"journal":{"name":"The Internet Journal of Radiology","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78179605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Simulation Of Contrast Enhancement Of Various Brain Lesions (Without Iv Gadolinium) By Using The Neural Network 用神经网络模拟不同脑病变(不加钆)的对比增强

The Internet Journal of Radiology Pub Date : 2012-01-24 DOI: 10.5580/2b5b

T. Biswas

{"title":"Simulation Of Contrast Enhancement Of Various Brain Lesions (Without Iv Gadolinium) By Using The Neural Network","authors":"T. Biswas","doi":"10.5580/2b5b","DOIUrl":"https://doi.org/10.5580/2b5b","url":null,"abstract":"PURPOSE:To produce an enhancement-like effect of the brain lesions of MRI images mathematically, without intravenous injection of contrast.INTRODUCTION:To improve the visibility of internal body structures, MRI contrast agents are used. Gadolinium (Gd), a paramagnetic substance, is the most commonly used compound for contrast enhancement. Gd is introduced into the blood stream for enhancement of brain tumors and various lesions depending upon the degradation of the blood-brain barrier. Due to their hydrophilic character, gadolinium chelates do not pass the blood-brain barrier. Contrast (Gd) mediated nephropathy (CMN) and systemic fibrosis are two notorious, irreversible complications.MATERIALS AND METHODS: A multi-slice EPI IR sequence was used to assess T1 relaxation times of various brain lesions and brain tumors before and after administration of gadolinium. T1 relaxation time and signal intensity with corresponding gray scale values (out of 256 shades) of various brain lesions before and after IV contrast were tabulated. A statistical relationship was determined for the magnitude of changes in the T1 values of brain tumors before and after the contrast material was added. Enhancement-like effects of the lesions could be reproduced mathematically with the help of neural networks without the IV contrast injection. With the help of Kmean clustering, the data were classified. A mapping function was generated that corresponded between these independent components and the cross-sectional data by using the neural network after training the network with a sample dataset. The training sample for the network was selected using K-mean clustering. A mapping of the lesion was done overlaid on the T1 weighted image.CONCLUSION: An attempt was successfully made to enhance various brain lesions statistically utilizing neural networks and without using IV contrast.","PeriodicalId":22526,"journal":{"name":"The Internet Journal of Radiology","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83728791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Rural versus Urban: Tennessee Health Administrators’ Strategies on Recruitment and Retention for Radiography 农村与城市:田纳西州卫生管理人员在放射学招募和保留方面的策略

The Internet Journal of Radiology Pub Date : 2011-01-01 DOI: 10.5580/239d

Ester L. Verhovsek, D. Slagle, R. Byington

引用次数: 2

Characterisation of Central Nervous System, Liver, and Abdomino-Pelvic Tumours using Meglumine Gadoterate: Pooled Phase III Studies. 中枢神经系统、肝脏和腹部-盆腔肿瘤的特征:汇总III期研究。

The Internet Journal of Radiology Pub Date : 2010-12-31 DOI: 10.5580/3ee

J. Pruvo, V. Vilgrain, C. Roy, P. Peretti, P. Halimi, O. Ernst, P. Valette, C. Matos, C. El-Khoury

{"title":"Characterisation of Central Nervous System, Liver, and Abdomino-Pelvic Tumours using Meglumine Gadoterate: Pooled Phase III Studies.","authors":"J. Pruvo, V. Vilgrain, C. Roy, P. Peretti, P. Halimi, O. Ernst, P. Valette, C. Matos, C. El-Khoury","doi":"10.5580/3ee","DOIUrl":"https://doi.org/10.5580/3ee","url":null,"abstract":"Aim: To compare the diagnostic performance of Gd-DOTA-enhanced MRI with non-enhanced MRI in the characterization of tumoral lesions with histological (or other) corroboration.Materials and Methods: Pooled data included 381 patients from three comparable Phase III trials of patients with abdomino-pelvic, hepatic and cerebro-spinal lesions. Each patient underwent MRI with appropriate unenhanced sequences (pre), followed by an injection of Gd-DOTA (0.1 mmol/kg) and corresponding enhanced sequences (post). Histology was used as the gold standard or, in the hepatic study, a corroborative diagnosis. Qualitative and quantitative assessments of images were done by one on-site and two independent off-site blinded readers.Results: Technical failures were at least five times more frequent on the unenhanced sequences compared with the GdDOTA-enhanced sequences. Delineation of lesion borders was superior with enhanced MRI compared with unenhanced MRI, irrespective of evaluation off-site (‘post’-injection/‘pre+post’-injection: 60.9%/65.3% versus ‘pre’-injection: 35.5%, p<.0001) or onsite (post: 75.8%, versus pre: 39.9%, p<.0001). Gd-DOTA sequences improved diagnostic confidence both off-site (76.2%/83.2% versus pre: 57.6%, p<.0001) and on-site (88.7%/93.9% versus pre: 43.9%, p<.0001). Sensitivity and specificity were statistically significantly improved with Gd-DOTA for off-site (pre+post/post: 90.3%/88.8% versus pre 84.3%; and 71.1%/76.2% versus 65.3%) and on-site (95.2%/94.7% versus 71.2% and 81.9%/81.0% versus 60.8%) readings, respectively. There were no unexpected adverse events.Conclusion: Gd-DOTA-enhanced MRI resulted in fewer technical failures, better image quality and better diagnostic performance compared with unenhanced MRI, confirming that Gd-DOTA adds clinical value and greater diagnostic confidence to the characterization of tumoral lesions.","PeriodicalId":22526,"journal":{"name":"The Internet Journal of Radiology","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2010-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79168042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Classic Case Of Polysplenia Syndrome With A Pancreatic Mass And SOLs In Liver 多脾综合征伴胰腺肿块及肝内SOLs 1例

The Internet Journal of Radiology Pub Date : 2010-12-31 DOI: 10.5580/1046

Vishal Gupta, Neema Agarwal

引用次数: 0

Intrahepatic Pancreatic Pseudocyst Complicating Chronic Calcific Pancreatitis - a rare cause for a cystic liver lesion 肝内胰腺假性囊肿并发慢性钙化性胰腺炎-一种罕见的肝囊性病变

The Internet Journal of Radiology Pub Date : 2009-12-31 DOI: 10.5580/1135

N. Mahmood, H. Suresh

引用次数: 0

Bilateral Proximal Femoral Focal Deficiency with fracture shaft of femur – A case report and review of literature. 双侧股骨近端局灶性缺损伴股骨骨干骨折1例报告并文献复习。

The Internet Journal of Radiology Pub Date : 2009-12-31 DOI: 10.5580/1cab

A. Qayum, A. Koka, Quibtiya Khursheed, A. Vakil, N. Shah

引用次数: 1

Bilateral sterile gluteal abscesses following intramuscular injection of Penicillin: CT appearance 肌肉注射青霉素后的双侧无菌臀脓肿:CT表现

The Internet Journal of Radiology Pub Date : 2009-12-31 DOI: 10.5580/22d9

Silanath Peungjesada, P. Gupta, G. Rice, Vidisha Ghole, M. Ketkar

引用次数: 7

In vivo MR Measurement of Refractive Index, Relative Water Content and T2 Relaxation time of Various Brain lesions With Clinical Application to Discriminate Brain Lesions 不同脑病变折射率、相对含水量和T2弛豫时间的体内MR测量及其在脑病变鉴别中的临床应用

The Internet Journal of Radiology Pub Date : 2009-12-31 DOI: 10.5580/1483

T. Biswas, T. Luu

{"title":"In vivo MR Measurement of Refractive Index, Relative Water Content and T2 Relaxation time of Various Brain lesions With Clinical Application to Discriminate Brain Lesions","authors":"T. Biswas, T. Luu","doi":"10.5580/1483","DOIUrl":"https://doi.org/10.5580/1483","url":null,"abstract":"PURPOSE: Refractive index (RI) is unique in discriminating various tissues. It is dependent on water and solid components such as protein and phospholipid of brain tissue resembling hydrogel. Our purpose was to determine RI of normal and pathological tissues of brain from the MR T2 relaxation time (T2 value) to determine relative water and solid contents of a tissue and discriminate various pathological lesions by the help of RI in T2 weighted MR images.METHODS: In a 0.3 Tesla permanent and 3 Tesla superconductor magnets T2 maps were created along with T2 shades to get T2 value of various brain tissue homogenates prepared from biopsy samples of known RI using multi-echo datasets by a read out train. T2 value of CSF, gray/white matter and various pathological lesions were determined.From the relationship of RI and T2, a RI map of brain and RI shade were produced. Computer generated RI and color coded map of T2 weighted images of various lesions were created. RESULTS: Analyzing various RI of pathological lesions it was noted that, RI of malignant lesions were more than 1.421 whereas RI of benign lesions were less than 1.395CONCLUSION: RI and color coded map may discriminate between benign and malignant lesions of brain.","PeriodicalId":22526,"journal":{"name":"The Internet Journal of Radiology","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83169378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 30