Use of a high b-value for diffusion weighted imaging of peritumoral regions to differentiate high-grade gliomas and solitary metastases

2014 ◽  
Vol 42 (1) ◽  
pp. 80-86 ◽  
Author(s):  
Chengkun Han ◽  
Shumin Huang ◽  
Jianfeng Guo ◽  
Xiongjie Zhuang ◽  
Haiwei Han
Keyword(s):  
Diffusion Weighted Imaging ◽  
B Value ◽  
High Grade ◽  
High B Value ◽  
Diffusion Weighted ◽  
High Grade Gliomas ◽  
Solitary Metastases

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.

High b-value diffusion-weighted imaging: A sensitive method to reveal white matter differences in schizophrenia

2012 ◽  
Vol 201 (2) ◽  
pp. 144-151 ◽  
Author(s):  
Philipp Sebastian Baumann ◽  
Leila Cammoun ◽  
Philippe Conus ◽  
Kim Quang Do ◽  
Pierre Marquet ◽  
...  
Keyword(s):  
White Matter ◽  
Diffusion Weighted Imaging ◽  
B Value ◽  
High B Value ◽  
Diffusion Weighted ◽  
Sensitive Method

Ultra-High b-Value Diffusion-Weighted Imaging–Based Abbreviated Protocols for Breast Cancer Detection

2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Sabine Ohlmeyer ◽  
Frederik Bernd Laun ◽  
Sebastian Bickelhaupt ◽  
Theresa Palm ◽  
Rolf Janka ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Cancer Detection ◽  
Diffusion Weighted Imaging ◽  
B Value ◽  
Breast Cancer Detection ◽  
High B Value ◽  
Diffusion Weighted
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