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目的分析SHCC动脉期强化的特征和原因。方法动脉期均做同层动态扫描。测量病灶、肝动脉和肝实质的CT值作时间密度曲线图。再测其开始强化、强化峰值及病灶最佳强化时间。结果病灶与肝实质曲线的关系有3种:①2次交叉者(73%)。病灶强化曲线上升超过肝实质形成第1交叉,由顶点下降到低于后者形成第2交叉。②没有第2次交叉者(19.2%)。③曲线始终位于肝实质曲线以下者(7.7%)。结论SHCC在(21.6±6)s开始强化,最佳强化时间是(36±8)s,持续时间为30.9(6～46)s。引起不强化常见原因是坏死。
Objective To analyze the characteristics and causes of arterial phase enhancement in SHCC. Methods All patients underwent dynamic scanning at the same level during the arterial phase. The CT values of lesions, hepatic artery and liver parenchyma were measured as time-density curves. And then start to strengthen it, strengthen the peak and lesion best enhancement time. Results The relationship between the lesion and the liver parenchyma curve has three kinds: ① 2 times cross (73%). The lesion enhancement curve rises above the liver parenchyma to form the first cross, decreasing from the apex to below the latter to form the second cross. ② no second cross (19.2%). ③ The curve is always below the liver parenchyma curve (7.7%). Conclusion SHCC begins to strengthen at (21.6 ± 6) s, the best enhancement time is (36 ± 8) s and duration is 30.9 (6 ~ 46) s. A common cause of non-enhancement is necrosis.