六层螺旋CT薄层增强3期扫描对小肝癌检出的初步评价

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目的评价六层螺旋CT薄层增强3期扫描对小肝癌(SHCC)的检出及诊断中的作用。方法回顾性分析研究23例明确诊断为SHCC患者的图像。采用高质量扫描模式,扫描参数为:层厚5mm,螺距3,增强3期扫描分别为平扫、注射对比剂后25 s动脉期扫描、45 s门静脉扫描,3m in延时扫描。高压注射器单相注射。三代显90m l,注射流率为3m l/s。结果23例SHCC在3期扫描上20例为典型表现;即动脉期为高密度、门静脉期和延迟期为低密度或等密度。3例CT表现不典型,各期均为低密度。结论大多数的SHCC在3期扫描上呈典型表现。SHCC定性诊断主要靠增强的动态变化特点,延迟期检出率最高,薄层扫描能提高SHCC检出率,综合3期扫描的表现可提高对小肝癌诊断和鉴别诊断的能力。 Objective To evaluate the role of six-slice spiral CT in the detection and diagnosis of small hepatocellular carcinoma (SHCC). Methods Retrospective analysis of 23 cases of patients with definite diagnosis of SHCC images. Using high-quality scanning mode, the scanning parameters were: thickness 5mm, pitch 3, enhanced three scan were plain scan, injection of contrast agent 25 s arterial phase scan, 45 s portal vein scan, 3 m in delay scan. High-pressure syringe single-phase injection. Three generations were significantly 90m l, injection flow rate of 3m l / s. Results Twenty-three cases of SHCC were typical in three stages of scanning. The arterial phase was high density, and the portal venous phase and delayed phase were low density or equal density. Three cases of CT showed atypical, all stages are low density. Conclusion Most of the SHCC showed typical features in 3 stages. The qualitative diagnosis of SHCC mainly depends on the characteristics of enhanced dynamic changes. The detection rate of delayed phase is the highest. The TLC scanning can improve the detection rate of SHCC. The comprehensive 3-phase scan can improve the diagnosis and differential diagnosis of small hepatocellular carcinoma.
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