الفهرس 
AnatomyOnly 14 pages are availabe for public view
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Abstract
Background: MRI provides multiplanar information in great range of hepatic focal lesions and makes successful diagnosis when other modalities fail, it provides details of vessels & bile ducts, it is the best way to diagnose, stage hepatic tumors and assess their blood supply, and it gives great data about differentiation between benign & malignant liver lesions; avoiding unnecessary tissue biopsy. Aim of the Work: The aim of this study is to use new advances in MRI technology to solve hepatic focal lesions that were indeterminate and had atypical CT or US appearances to narrow their differential diagnosis and decrease subsequent biopsy in such cases. Patients and Methods: This study included (26) patients, 16 males & 10 females, their ages ranges from 27 to 69 years with the mean age 54 years. They have attended to Ain Shams University Hospital between July 2016 & February 2017. Results: There was highly significant difference between the mean ADC of the malignant lesions (metastasis and HCC) and the mean ADC of benign lesions (hemangioma, dysplastic nodules, regenerative nodules and cyst). The ADC of malignant lesion was much less than that of benign lesion. The mean ADC of malignant lesions) was 0.931 ×10-3 mm2/sec and the mean ADC of benign lesions was 1.965×10-3 mm2/sec (p value < 0.001, S). Conclusion: The ADC values of benign lesions are significantly higher than those of malignant lesions, with variable degrees of overlap between the pathological entities, in our study the cut-off value between benign and malignant was 1.2324. Recommendations: DWI should always be used in conjunction with conventional MRI sequences since there is a degree of overlap between ADC values of benign and malignant lesions.