小肝癌多排螺旋计算机X线体层扫描多期扫描价值的探讨

目的 评价多排螺旋CT多期扫描对小肝癌的诊断与检出。方法 75例小肝癌患者,采用MarconiMX8000CT扫描机,动脉早期的延迟时间为21s,动脉晚期延迟时间为34s,门静脉期为80s,每次全肝扫描的时间为6s。结果 71个病灶在动脉早期与动脉晚期及动脉早期与门静脉期肝癌与肝脏密度值差值有显著性(F=3.327,P<0.05)。91个病灶检出率动脉早期低于动脉晚期,分别为45.1％和83.5％,双动脉期对小肝癌的检出率为92.3％。动脉晚期加门静脉期检出率为94.5％,双动脉期加门静脉期检出率97.8％,两者差异无显著性。结论 多排螺旋CT肝脏快速、薄层、多期扫描,使富血供的肝癌得以检出的机会增加。

Small hepatocellular carcinoma: multiphase hepatic CT scan with a multidetector row helical CT scanner

Objective To evaluate multiphase hepatic CT scan using multidetector row helical CT (MDCT) in detecting hypervascular small hepatocellular carcinoma (SHCC). Methods Multiphase hepatic CT scan in 75 patients with SHCC was carried out with Marconi MX8000 multidetector row helical CT scanner. The early arterial phase scan started at the 21th second after the injection of contrast medium, the late arterial phase scan started at the 34th second, and the portal venous phase started at the 80tieth second, six seconds every time. Results The study showed that the density values of 71 lesions between liver and SHCC were different significantly among the early arterial phase, the late arterial phase and the portal venous phase (F = 3.327, P < 0.05). Among the 91 lesions, the detectable rates of the early arterial phase and the late arterial phase were 45.1% and 83.5%, respectively. The rate of double arterial phases was 92.3%. The rates increased to 94.5% and 97.8%, when the late arterial phase combined with the portal venous phase and the double arterial phase combined with the portal venous phase. Conclusion The utility of MDCT with faster speed, thinner slice and multiphases scanning has improved the opportunity of detecting hypervascular hepatocellular carcinoma.