对１１８例经手术病理证实的小肝细胞癌（ＳＨＣＣ）进行了前瞻性ＣＴ研究。男１０９例，女９例，年龄１８～７６岁，平均４９．５岁。１１８例均作了增强前和增强后扫描。其中２０例还加进床／同层动态团注增强ＣＴ（ＤＬＢ一ＣＴ、ＤＳＢ一ＣＴ），５例作了４ｈ延迟ＣＴ（Ｄ一ＣＴ），１２例作了动脉造影ＣＴ（ＣＴＡ），其中５例又加作了经动脉门脉造影ＣＴ（ＣＴＡＰ）。增强前ＳＨＣＣ主要表现为低密度（９３．２％）。增强后动脉期呈明显早期增强，但密度很快下降，在门脉期呈低密度表现。在Ｄ一ＣＴ和ＣＴＡＰ图像上呈低密度，而ＣＴＡ为显著高密度。不同ＣＴ方法检出ＳＨＣＣ敏感的排列顺序为：增强前ＣＴ＜增强后ＣＴ＜ＤＩＢ一ＣＴ或Ｄ－ＣＴ＜ＣＴＡ或ＣＴＡＰ。 A prospective CT study was performed on 118 cases of small hepatocellular carcinoma (SHCC) confirmed by surgery and pathology. 109 males and 9 females, aged 18-76 years, mean 49.5 years old. All 118 cases were scanned before and after enhancement. Twenty of these patients were also included in the bed/same dynamic bolus contrast-enhanced CT (DLB-CT, DSB-CT), 5 were treated with 4h delayed-CT (D-CT), and 12 were treated with arteriography CT (CTA). Five patients were additionally treated with transarterial portography CT (CTAP). The pre-enhancement SHCC mainly showed low density (93.2%). The enhanced early arterial phase showed marked early enhancement, but the density decreased rapidly and showed a low density during the portal phase. The density is low on the D-CT and CTAP images, while the CTA is significantly higher density. The detection order of SHCC sensitivity detected by different CT methods was: pre-enhancement CT