Imaging Tutorial: Differential Diagnosis of Bright Lesions on Diffusion-weighted MR Images

Radiographics ◽  
10.1148/rg.e7 ◽  
2003 ◽  
Vol 23 (1) ◽  
pp. e7-e7 ◽  
Author(s):  
Tadeusz W. Stadnik ◽  
Philippe Demaerel ◽  
Robert R Luypaert ◽  
Christo Chaskis ◽  
Katrijn L. Van Rompaey ◽  
...  
Keyword(s):  
Differential Diagnosis ◽  
Mr Images ◽  
Diffusion Weighted ◽  
Bright Lesions

scholarly journals Diffusion-weighted MR images and pineoblastoma: diagnosis and follow-up

2008 ◽  
Vol 66 (1) ◽  
pp. 64-68 ◽  
Author(s):  
Emerson L. Gasparetto ◽  
L. Celso Hygino da Cruz Jr ◽  
Thomas M. Doring ◽  
Bertha Araújo ◽  
Mário Alberto Dantas ◽  
...  
Keyword(s):  
Differential Diagnosis ◽  
Mr Imaging ◽  
Poor Prognosis ◽  
Pineal Region ◽  
Restricted Diffusion ◽  
Mr Images ◽  
Surgical Biopsy ◽  
Pineal Tumors ◽  
Diffusion Weighted

Pineoblastomas are uncommon pineal tumors, which demonstrate rapid growing and poor prognosis. We report the case of a 43-year-old man with an enhancing pineal region mass, which showed restriction of the diffusion on diffusion-weighted (DW) MR images. The surgical biopsy defined the diagnosis of pineoblastoma and the therapy was initiated with radiation and chemotherapy. Three months later, the follow-up MR imaging showed areas suggestive of necrosis and the DW images demonstrate no significant areas of restricted diffusion. The differential diagnosis of pineal region masses that could show restriction of diffusion is discussed.

The Added Value of Inflow-Based Vascular-Space-Occupancy and Diffusion-Weighted Imaging in Preoperative Grading of Gliomas

2021 ◽  
pp. 1-8
Author(s):  
Haimei Cao ◽  
Xiang Xiao ◽  
Jun Hua ◽  
Guanglong Huang ◽  
Wenle He ◽  
...  
Keyword(s):  
Diagnostic Accuracy ◽  
Roc Curve ◽  
Diffusion Weighted Imaging ◽  
Low Grade ◽  
High Grade ◽  
Mr Images ◽  
Vascular Space ◽  
Diffusion Weighted ◽  
High Grade Gliomas ◽  
And Diffusion

Objectives: The present study aimed to study whether combined inflow-based vascular-space-occupancy (iVASO) MR imaging (MRI) and diffusion-weighted imaging (DWI) improve the diagnostic accuracy in the preoperative grading of gliomas. Methods: Fifty-one patients with histopathologically confirmed diffuse gliomas underwent preoperative structural MRI, iVASO, and DWI. We performed 2 qualitative consensus reviews: (1) structural MR images alone and (2) structural MR images with iVASO and DWI. Relative arteriolar cerebral blood volume (rCBVa) and minimum apparent diffusion coefficient (mADC) were compared between low-grade and high-grade gliomas. Receiver operating characteristic (ROC) curve analysis was performed to compare the tumor grading efficiency of rCBVa, mADC, and the combination of the two parameters. Results: Two observers diagnosed accurate tumor grade in 40 of 51 (78.4%) patients in the first review and in 46 of 51 (90.2%) in the second review. Both rCBVa and mADC showed significant differences between low-grade and high-grade gliomas. ROC analysis gave a threshold value of 1.52 for rCBVa and 0.85 × 10−3 mm2/s for mADC to provide a sensitivity and specificity of 88.0 and 81.2% and 100.0 and 68.7%, respectively. The area under the ROC curve (AUC) was 0.87 and 0.85 for rCBVa and mADC, respectively. The combination of rCBVa and mADC values increased the AUC to 0.92. Conclusion: The combined application of iVASO and DWI may improve the diagnostic accuracy of glioma grading.

scholarly journals Mapping gradient nonlinearity and miscalibration using diffusion‐weighted MR images of a uniform isotropic phantom

2021 ◽  
Author(s):  
Alan Seth Barnett ◽  
M. Okan Irfanoglu ◽  
Bennett Landman ◽  
Baxter Rogers ◽  
Carlo Pierpaoli
Keyword(s):  
Mr Images ◽  
Diffusion Weighted ◽  
Gradient Nonlinearity

scholarly journals Differentiating benign and malignant inflammatory breast lesions: Value of T2 weighted and diffusion weighted MR images

2018 ◽  
Vol 50 ◽  
pp. 38-44 ◽  
Author(s):  
Shotaro Kanao ◽  
Masako Kataoka ◽  
Mami Iima ◽  
Debra Masako Ikeda ◽  
Masakazu Toi ◽  
...  
Keyword(s):  
Breast Lesions ◽  
Mr Images ◽  
Diffusion Weighted ◽  
And Diffusion

scholarly journals Diffusion-Weighted Imaging for the Differential Diagnosis of Disorders Affecting the Hippocampus

2012 ◽  
Vol 33 (2) ◽  
pp. 104-115 ◽  
Author(s):  
A. Förster ◽  
M. Griebe ◽  
A. Gass ◽  
R. Kern ◽  
M.G. Hennerici ◽  
...  
Keyword(s):  
Differential Diagnosis ◽  
Diffusion Weighted Imaging ◽  
Diffusion Weighted

scholarly journals Diagnostic value of diffusion weighted MRI and ADC in differential diagnosis of cavernous hemangioma of the liver

2016 ◽  
Vol 16 (1) ◽  
pp. 227 ◽  
Author(s):  
Ozlem Tokgoz ◽  
Ebru Unlu ◽  
Ilker Unal ◽  
Ismail Serifoglu ◽  
Ilker Oz ◽  
...  
Keyword(s):  
Differential Diagnosis ◽  
Cavernous Hemangioma ◽  
Diagnostic Value ◽  
Diffusion Weighted Mri ◽  
Diffusion Weighted

Does diffusion-weighted magnetic resonance imaging have a place in the differential diagnosis of brucella sacroiliitis and seronegative spondyloarthropathy?

2020 ◽  
pp. 028418512093837
Author(s):  
Sunay Sibel Karayol ◽  
Kudret Cem Karayol
Keyword(s):  
Magnetic Resonance Imaging ◽  
Bone Marrow ◽  
Differential Diagnosis ◽  
Magnetic Resonance ◽  
Control Group ◽  
Resonance Imaging ◽  
Visual Evaluation ◽  
Mean Values ◽  
Diffusion Weighted ◽  
The Mean

Background The aim of this study is to investigate the role of diffusion-weighted imaging (DWI) in the differential diagnosis of sacroiliitis. Purpose To compare the sacroiliac magnetic resonance imaging (MRI) examinations of patients with suspected active sacroiliitis with patients with acute SpA MR findings and the DWI examinations of patients with acute brucella sacroiliitis, and thereby determine whether DWI can contribute to the differential diagnosis. Material and Methods A total of 84 patients were included in the study and were separated into three groups: group 1 (13 women, 6 men) comprised cases with brucella positive for sacroiliitis; group 2 (17 women, 19 men) comprised cases negative for brucella but with sacroiliitis; and group 3 (16 women, 13 men) comprised cases negative for brucella and sacroiliitis. Results The mean bone marrow apparent diffusion coefficient (ADC) values independently of edema were determined as 0.71 × 10−3 in sacroiliitis and brucella-positive patients, as 0.53 × 10−3 in brucella-negative and sacroiliitis-positive patients, and as 0.43 × 10−3 in the control group of brucella-negative sacroiliitis-negative patients. In the ADC measurements taken from areas of evident edema in patients with sacroiliitis, the mean values were 0.13 × 10−3 in the brucella-positive group and 0.12 × 10−3 in the brucella-negative group. Conclusion By adding DWI, which is a rapid MR sequence, to sacroiliac joint MR examination, normal bone marrow and bone marrow with sacroiliitis can be objectively differentiated with ADC measurements in addition to visual evaluation.

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