电子束CT流动检查评价原发性肝癌

Evaluation of hepatocellular carcinoma with flow study of electron beam CT

目的 应用电子束CT(EBCT)流动扫描研究原发性肝癌的时间 密度曲线特点与肿瘤血供和病理的对应关系 ,以期提高诊断的特异性和准确性。方法 3 1例肝脏肿块者均行EBCT流动扫描。静脉注射对比剂 80～ 10 0ml,速度为 6～ 8ml/s,病灶区扫描 6层 ,每层扫描 13次 ,需时 12 0秒。画出时间 密度曲线及测量各参数值。结果 3 1例肝癌均表现为不同程度的增强。小于 5cm的肝癌与大于 5cm肝癌和弥漫型肝癌其增强类型和程度不同 (P <0 0 1) ,增强的肿瘤实质其时间 密度曲线均呈速升速降型 ,但其平均高峰CT值和升高的CT值不同 (P <0 0 1)。结论 原发性肝癌在流动扫描中具有一定的特征性 ,不同的时间 密度曲线代表肿瘤内不同的病理基础和血供特点 ,EBCT流动扫描可提高诊断肝癌的特异性和准确性。

Objective To study the corresponding relation of the density time curve to the blood supply and pathology of hepatocellular carcinoma (HCC) with flow study of electron beam CT(EBCT) in order to improve the specificity and accuracy of diagnosing hepatocellular carcinoma Methods Thirty one patients with liver masses underwent flow study of EBCT after intravenous administration of contrast medium(80-100 ml) at a rate of 6-8 ml/s EBCT scanning 6 sections for lesion and 13 times for each section during 120 s was obtained The density time curve was plotted and each parameter value was measured Results Various degrees of contrast enhancement was displayed in 31 cases with HCC, and the patterns of enhancement were different in HCC of less than 5 cm , more than 5 cm and diffuse type ( P <0 01) Density time curves of enhanced masses showed fast rise and drop ,but the mean peak value and rise value were different in HCC of less than 5 cm and more than 5 cm ( P <0 01) Conclusions Primary hepatocellular carcinoma exhibits a certain feature during flow study Different density time curves reflect presented different pathologic changes and blood supply features of tumors The specificity and accuracy can be improved with flow study of EBCT