16层螺旋CT多期增强扫描对小肝癌的诊断研究

目的 研究小肝癌(SHCC)在16层螺旋CT( SCT)多期（动脉期、门脉期和延迟期）增强扫描的表现特征，提高小肝癌的诊断水平及评价其应用价值。方法 收集53例SHCC进行回顾性分析，所有病例均行16层螺旋CT多期增强扫描，扫描时间分别为动脉期34～40s、门脉期65～80s、延迟期4～6 min，用高压注射器经静脉注...

Contrast-enhanced 16 multi-slice spiral CT scans for the diagnosis of small hepatocellular carcinoma

Objective To improve the diagnostic level for small hepatocellular carcinoma ( SHCC )by exploring the characteristic appearance of SHCC on constract-enhanced 16-slice spiral CT multi-phase ( arterial, portal venous phase, and delayed phase ) scans. Methods The data on 53 patients with SHCC were retrospectively analyzed. All the patients received 16-slice spiral CT multi-phase scans, with scanning time of 34-40s at arterial phase, 65-80s at portal venous phase, and 4-6min at delayed phase. The constract of 85-95ml was intravenously injected at a velocity of 2.5-3 ml/s with a high pressure syringe. The enhancement patterns of SHCC were observed at different phases. Results 75lesions were found. The detection rate was 70.0％ for plain scan, 97.1％ for arterial phase, 82.9％ for portal phase, and 87.1％ for delayed phase, with a sensitivity higher in arterial phase than in portal phase and delayed phase. Conclusions Contrast-enhanced 16-slice spiral CT scans can fully reflect the enhancing characteristics of blood supply in SHCC, improving the detection rate and the accuracy of diagnosis.