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Abstract #2621

Comparison of the diagnostic performances of three methods of ROI placement for the measurements of Intravoxel incoherent motion diffusion-weighted MR imaging parameters in hepatocellular carcinoma

Yi Wei1, Bin Song2, and Dandan Zheng3

1Radiology, West China Hospital, Sichuan University, Chengdu, China, 2Radiology, West Chian Hospital, Sichuan University, Chengdu, China, 3GE Healthcare, China, Beijing, China

The pathological differentiated grade is heavily associated with the hepatocellular carcinoma prognosis. Through a prospectively research, we sought to determine the diagnostic performances of three methods of ROI placement for measurements of IVIM parameters in the grading of hepatocellular carcinoma. According to the results, we found that different ROI positioning methods used significantly affects the IVIM and ADC parameters measurements. Measurements of ADCslow value derived from whole tumor volume method entailed the highest diagnostic performance in grading hepatocellular carcinoma. These results suggested that ADCslow value derived from whole tumor volume method might be useful in assessing the differentiated grade of carcinoma, and which might be helpful in predicting the patients’ prognosis.

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