Application of Magnetic Resonance Diffusion Weighted Imaging for Detecting Focal Liver Lesions

Objective To study the value of diffusion weighted imaging (DWI) in diagnosis and identify of focal liver lesions. Methods DWI was performed in 40 patients with liver lesions detecting by routine MRI. The imaging character and apparent diffusion coefficient (ADC value) were analyzed. Results 75 lesions were detected in these 40 patients. The signal feature was related to the structure and composition of the lesions,but that had no specificity. The average ADC value of hepatocellular carcinoma was(1.25±0.30)×10-3 mm2/s,liver metastases(1.12±0.52)×10-3 mm2/s,hepatic hemangiomas (2.27±0.49)×10-3 mm2/s,hepatic cysts (3.05±0.50) ×10-3 mm2/s,and hepatapostema (1.91±0.46)×10-3 mm2/s. The difference between the average ADC values was significant (P 0.05). Conclusions DWI has advantages for detecting focal liver lesions. The measurement of ADC value was helpful in diagnosis and identification of focal liver lesions,especially in differentiation of benign and malignant lesions.