小肝癌的CT及MRI诊断价值

目的探讨小肝细胞癌的CT及MRI表现，提高对小肝癌的诊断水平。方法分析29例41个小肝细胞癌在CT平扫、增强后的表现及MRI不同序列、Gd—DTPA增强后的信号特点。结摹41个小肝癌CT表现为平扫时呈高、等、低密度。三期增强扫描示动脉期明显强化呈高密度，门脉期以低密度为主，有假包膜强化。41个小肝细胞癌中T1加权像表现为低、高、等信号，T2加权像呈高信号为主。增强后动脉期明显强化，门脉期及延迟期以低信号为主。结论螺旋CT三期增强扫描可提高小肝癌检出率，而MRI具有多序列成像特点，可以通过不同的信号特征来反映结节性病变的组织成分。结合Gd-DTPA增强扫描可以提高诊断准确率。

The diagnostic value of small hepatocelluar carcinoma with CT and MRI

Objective To evaluate the image presentation of CT and MRI in small hepatocelluar carcinoma(SHCC), and to enhance the diagnostic level. Methods 26 patients with small hepatocelluar carcinoma (SHCC) performed CT normal and enhanced scan, MR signal intense were analyzed using different sequences and MR dynamic enhanced scanning, and both proven by surgery and pathology. Results 26 patients with SHCC,21 cases were typodensity, 4 cases were isodensity, 1 case were hypodensity in CT. In triphasic spiral CT enhan...