动态增强扫描对小肝癌的MRI诊断价值

目的探讨Gd-DTPA动态增强扫描MRI对小肝癌的诊断价值。方法搜集16例（21个病灶）经临床和病理证实的小肝癌MR扫描资料，包括平扫及人工手推法动态增强扫描。结果平扫T2WI多呈高信号，T1WI多呈低信号，少数呈等或高信号。23．81％可见假包膜。MRI平扫与动态增强对小肝癌诊断的准确率分别66．67％和95．24％（P〈0．05）。结论Gd-DTPA动态增强扫描较平扫MRI能提高小肝癌的定性准确率。

Evaluation of Dynamic Contrast-enhanced MRI in the Diagnosis of Small HCC

Objective To study the diagnostic value of dynamic gadolinium-enhanced MR imaging in small hepotacellar carcinoma(SHCC).Methods The scan date by MRI of 16 cases(21 lesions)with SHCC confirmed by pathology clinic were reviewed,include plain scan and dynamic contrast-enhanced scan by manual injection.Results On plain scan,most SHCC showed hyperdensity on T2WI.Most SHCC showed hypodinsity and a few showed isodensity or hyperdensity on T1WI.Pseudocapsule can be detected in 23.81% cases.On dynamic-enhanced RMI,17 lesions were hypervascular and 4 lesions were pypovascular.Pesudocapsule can be detected in 57.14% cases.The diagnostic accuracy of plain MRI scan and the Gd-DTPA dynamic-enhanced MRI on SHCC were 66.67% and 95.24%(P<0.05).Conclusions Compared with plain scan,Gd-DTPA dynamic-enhanced MRI can promote the diagnostic accuracy of SHCC.