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目的：评价螺旋ＣＴ作肝脏肿瘤早期增强扫描的作用。材料和方法：用螺旋ＣＴ和造影剂快速滴注法对３６例肝脏肿瘤患者作全肝早期增强扫描。以２ｍｌ／ｓ左右的速度经时前静脉注入浓度为３００ｍｇＩ／ｍｌ的非离子型造影剂１００ｍｌ，在开始滴注造影剂７５秒内扫完全肝。结果：所有图像主动脉密度均高于或等于门静脉密度。与邻近肝组织相比，１５例（２０灶）肝细胞性肝癌（ＨＣＣ）呈高密度。１１例ＨＣＣ呈等或较低密度：２例为弥漫型ＨＣＣ；９例有严重肝动脉－门静脉瘘，其中２例门静脉呈逆向增强。７例肝转移瘤呈低密度。３例（５灶）海绵状血管瘤呈向心性增强。结论：螺旋ＣＴ作肝脏早期增强扫描可如实显示肿瘤血供和血管受侵的情况，有利于病灶性质的鉴别和多血供多发病灶及小病灶的发现。
Objective: To evaluate the role of spiral CT in early enhancement of liver tumors. MATERIALS AND METHODS: A total hepatic early enhancement scan was performed on 36 patients with hepatic tumors using spiral CT and contrast agent rapid instillation. At a rate of about 2 ml/s, 100 ml of a nonionic contrast agent having a concentration of 300 mgI/ml was intravenously injected through the anterior vein, and the liver was completely scanned within 75 seconds after the start of contrast instillation. Results: The aortic density was higher or equal to the portal vein density in all images. Compared with the adjacent liver tissue, 15 cases (20 lesions) showed high density of hepatocellular carcinoma (HCC). 11 cases of HCC showed equal or lower density: 2 cases of diffuse HCC; 9 cases of severe hepatic artery - portal vein fistula, including 2 cases of portal vein showed a reverse enhancement. 7 cases of liver metastases showed low density. Three cases (5 lesions) of cavernous hemangioma showed centripetal enhancement. Conclusion: Spiral CT scans for early enhancement of the liver can accurately show the blood supply and vascular invasion of the tumor, which is beneficial to the identification of the nature of lesions and the discovery of multiple lesions and multiple lesions.