Preliminary quantitative research of MR diffusion weighted imaging in soft tissue tumors
JIA Fei-ge1, ZHANG Li-na2, WANG Shao-wu2
1. Department of Radiology, Hexian Memorial Hospital, Panyu District, Guangzhou 511400, China;2. Department of Radiology, the First Affiliated Hospital of Dalian Medical University, Dalian Liaoning 116011, China
Abstract：Objective: To evaluate the diagnostic value of diffusion-weighted imaging(DWI) apparent diffusion coefficient(ADC) and exponential diffusion coefficient(EDC) in differentiation of benign from malignant soft tissue tumors. Methods: Twenty-three patients with soft tissue tumors were studied by DWI. All DWI were performed with SE-EPI technique, which “b” was 0 and 300s/mm2. DWI was analyzed to obtain ADC and EDC of tumor parenchyma. Results: The average value of ADC was(1.86±0.19)×10-3mm2/s for malignant group and (1.64±0.15)×10-3mm2/s for benign group when “b” was 300s/mm2. The mean ADC in benign and malignant tumors had significant difference. The average value of EDC was (160.02±83.23)×10-3 for malignant group and (136.89±44.60)×10-3 for benign group when “b” was 300s/mm2. The mean EDC in benign and malignant tumors has no significant difference. Conclusion: ①ADC is helpful to distinguish malignant tumors from benign tumors when “b” is 300s/mm2. ②EDC has limited value in distinguishing malignant tumors from benign tumors.
2006, Vol. 17 
