双期动态CT对肝内占位性病变诊断的研究

作者对疑有肝内占位性病变患者进行了双期动态ＣＴ检查，经证实者共４７例，原发性肝癌的特征性表现是：肝动脉期病变区见肿瘤血管及血池影和／或明显增强呈高密度，门脉期则很快恢复为相对低密度，肝血管的特征性表现是：病灶增强区扩散极缓性，病变全部充满强呈等密度至少需要３分钟，本法对原发性肝癌定性诊断的敏感性，特异性和准确性分别是９６．８％，８７．５％和９３．６％；肝血管瘤分别是９２．９％，９６．９％和９５．７

Biphasic Dynamic CT in Diagnosis of Space-occupying Lesion of Liver

Forty-seven patients with suspected space-occupying lesion of liver were examined with biphasic dynamic CT,The diagnositc value of biphasic dynamic CT was discussed.The characteristic findings of PHC were tumor vascularity and vascular pooling and/or striking enhancement in the lesion in the arterial phase,and in portal phase the hyperdense areas of the lesion changed rapidly to hypodense within 3 minutes.The characteristic features of hemangioma were gradual fill-in and delay of at least 3 min before total opacification of the lesion,In determining the nature of PHC,the biphasic dynamic CT had a sensitivity of 96.8%, a specifity of 87.5% and an accuracy of 93.6%. For hemangioma, this method showed a sensitivity of 92.9%, a specifity of 96.9% and an accuracy of 95.7%,The biphsic dynamic CT had a better result than the conventional intravenous bolus method.It could be concluded that this technique was a safe,reliable,and could be performed routinely in patients with space-ocupying lesion of liver.