Diagnosis value of DWI, T2 WI and dynamic enhanced MR imaging for early liver abscess / 第二军医大学学报

ABSTRACT

Objective: The imaging diagnosis of early liver abscess is difficult. This study is to evaluate the diagnostic value of DWI, T2WI and dynamic enhanced MR imaging for early liver abscess. Methods: DWI, T2WI and dynamic enhanced imaging scans were performed in 17 patients with 17 early liver abscesses. The signal intensities and ADC values of necrotic area, non-necrotic area and normal liver were measured and compared. Results: The ADC value of the necrotic areas of liver abscesses ([0.88±0.09] mm2/s) was significantly lower than those of normal liver ([1.31±0.12] mm2/s,P<0.05) and non-necrotic area of liver abscesses ([1.43±0.18] mm2/ s,P<0.05); there was also significant difference between the ADC values of the normal liver and non-neocrotic area (P<0.05). The necrotic areas had a hyperintensity characteristic on DWI, T2WI and a hypointensity characteristic on T1 WI; no enhancement was found on dynamic enhanced imaging. The non-necrotic areas had moderate hyperintensity on DWI, T2 WI and hypointensity on T1 WI; there was obvious enhancement on dynamic enhanced imaging. Conclusion: The early liver abscess is characterized on magnetic resonance imaging. The DWI scan is helpful for diagnosis of early liver abscess.