目的 分析高速多排螺旋CT对 ≤2cm肝癌子灶的诊断敏感性。方法 回 顾性分析2013年4月-2016年10月我院64例 经组织病理学证实为原发性肝癌伴子灶 患者高速多排螺旋CT三期增强扫描数据， 分析其影像表现并与CT扫描后5d内数字减 影血管造影(DSA)结果进行对比分析，分 析高速多排螺旋CT对≤2cm肝癌子灶诊断 敏感性和影像学特征。结果 高速多排螺 旋CT共检测原发灶64个，子灶216个(左 叶49个，右叶167个)，≤2cm子灶181个 (83.79%)，<1cm子灶48个；DSA检测原发 灶64个，子灶总数161个(左叶42个，右叶 119个)，其中≤2cm子灶119(73.91%)，未 检出<1cm子灶；CT子灶大小分布、平均子 灶数目与DSA存在显著差异(P<0.05)；CT 平扫下，低密度肝癌子灶184个，等密度 子灶22个；动脉期增强扫描显示轻度或明 显强化肝癌子灶184个；平衡期显示低密 度子灶211个，等密度子灶5个；有肝癌典 型特征子灶173个；三期增强扫描始终无 强化的低密度子灶37个；其中≤2cm子灶 强化率76.24%；161个肝癌子灶DSA染色均 明显，供血较好。结论 高速多排螺旋CT 对≤2cm肝癌子灶的诊断和检出较DSA有明 显优势，尤其适于更小癌灶(<1cm)诊断和 检出。

Objective To analyze the sensitivity of high-speed multi-slice spiral CT in diagnosis of satellite nodules ≤ 2cm of hepatocellular carcinoma (HCC). Methods A total of 64 patients with HCC satellite nodules confirmed by histopathological examination in our hospital from April 2013 - October 2016 were examined by high-speed multi-slice spiral CT three-phase contrast enhanced scanning. The results were compared with those of digital subtraction angiography (DSA) within 5 days after CT scanning. The sensitivity and imaging features of high-speed multi-slice spiral CT in diagnosis of HCC satellite nodules ≤ 2cm were analyzed. Results There were 64 primary lesions, 216 satellite nodules (49 satellite nodules in left lobe, 167 satellite nodules in right lobe), 181 satellite nodules (83.79%) ≤ 2cm and 48 satellite nodules <1cm detected by high-speed multislice spiral CT. There were 64 primary lesions, 161 satellite nodules (42 satellite nodules in left lobe, 119 satellite nodules in right lobe), 119 satellite nodules (83.79%) ≤ 2cm and none nodules <1cm detected by DSA. There were significant differences in the size distribution and the average number of satellite nodules between CT and DSA (P<0.05). CT plain scan showed 184 low-density HCC satellite nodules and 22 equal-density HCC satellite nodules. Contrast-enhanced scan showed 184 mild or obviously enhanced HCC satellite nodules in arterial phase, 211 low-density satellite nodules in balance phase, 5 equal-density satellite nodules. There were 173 typical HCC satellite nodules. Threephase contrast-enhanced scan showed 37 satellite nodules without enhancement. The enhancement rate of satellite nodules ≤ 2cm was 76.24%. DSA staining of 161 HCC satellite nodules was obvious, and the blood supply was good. Conclusion High-speed multi-slice spiral CT has obvious advantages over DSA in the diagnosis of HCC satellite nodules, especially suitable for diagnosis and detection of smaller tumors (<1cm).