螺旋CT三期增强扫描对小肝癌的诊断

目的　研究小肝癌 (SHCC)在螺旋CT三期 (动脉期、门脉期和延迟期 )增强扫描的表现 ,比较各期的病灶检出率 ,提高诊断水平。方法　 70例SHCC患者行平扫及增强扫描 ,造影剂注射速率为 3ml/s ,然后开始动脉期、门脉期和延迟期的扫描。统计各期的病灶检出数 ,观察病灶在不同时期的特征。结果　共发现 82个病灶 ,动脉期、门脉期和延迟期的检出率分别为 92 .68% ,70 .73 %和 73 .17%。动脉期的敏感性高于延迟期和门脉期。三期联合检出率明显增加达 95 %。结论　SHCC增强扫描表现形式复杂 ,螺旋CT三期扫描可以充分显示SHCC各期的增强表现 ,正确评价其血流变化 ,提高了病灶的检出率和诊断的准确率

Evaluation of Triple-phase Spiral CT for the Detection of Small Hepatocellular Carcinoma

Objective To investigate the features of the enhancement of SHCC at triple-phase spiral CT scanning and compare its sensitivity in different phase.Methods The pre- and post-contrast CT scanning of the entire liver in 70 patients with SHCC was carried out with a helical CT scanner. The contrast material was infused at a rate of 3ml/s, followed by sequential arterial-, portal- and equilibrium- phase scans of the liver. The number of the detected lesions was calculated in each phase, the characterization of lesions in each phase was observed.Results Of the 82 detected SHCC, the sensitivity in three phases was 92.68%, 70.73% and 73.17% respectively. The sensitivity increased significantly to 95% by combining the detection of three phases. Conclusion Triple-phase contrast enhanced spiral CT can fully demonstrate the patterns of SHCC and improve its detection rate.