摘要
目的 :探讨原发性肝癌的电子束CT增强特征。材料和方法 :3 2例原发性肝癌行 3 5例次平扫和双期或三期增强扫描。肝动脉期扫描时间约为 2 0～ 2 5s ,门静脉期约为 40～ 5 0s ,平衡期扫描延长至 10 0s甚至 5～ 10min。把肝癌的增强分为 7种方式分析肿瘤增强特征。结果 :共检出 86个肿块和结节 ,动脉期能显示肿瘤的血管、动脉门静脉瘘、假包膜血供、门静脉癌栓。≤ 3 0cm结节动脉期 61%呈均匀高密度增强 ,13个表现为均匀或不均匀等密度 ,6个为低密度。门静脉期低密度肝癌结节 2 8个 (65 % ) ,均匀等密度结节 13个 ,少数表现为不均匀等密度和高密度。 >3 0cm肿块动脉期65 %表现为均匀或不均匀高密度 ,7个为不均匀等密度 ,6个为低密度。在门静脉期肿瘤主要表现为不均匀低密度 79%(2 7/3 4) ,5个表现为不均匀等密度 ,2个为均匀等密度 ,无 1例高密度。无论肿瘤大小平衡期呈等、低密度。结论 :EBCT显示肿瘤的血供特征以及门静脉累及 。
Purpose: To analyze the hepatic contrast enhanced characteristics in patients with hepatocellular carcinoma by Electronic beam CT. Materials and Methods: 35 of 32 cases with proved HCC underwent contrast enhanced EBCT. After injection of contrast material, hepatic arterial dominant phase (HAP) started at 20-25s, portal venous dominant phase (PVP) at 40-50s, equilibrium phase (EP) at 100s or delayed to 5-10 minutes. Enhancement was divided into 7 patterns to evaluate the characterstics of the tumors. Results: Eight six tumors were seen in 32 cases. Some of them showed tumor arteries, arterial portal shunting, pseudocapsule and enhanced thrombus in arterial dominant phase. In tumors that were less than 3.0cm, thirty foci were found homogeneously highdensity, thirteen homogeneously or inhomogeneous isodense and six low density during the HAP. During the PVP, 28 nodules were found low density, 13 nodules homogeneous isodense, only one nodule inhomogeneous isodense, two high density. In tumors that were more than 3.0cm, the homogenous or inhomogeneous high density in 6 tumors on HAP images. The tumors were low density in 27 (80%) lesions on PVP images, the homogenous or inhomogeneous isodense in 7 lesions. Both large tumors and small nodules showed iso or hypo dense on equilibrium phase image. Conclusion: The use of EBCT with contrast enhancement offers the ability to display supplying artery and invasion of portal venous of the tumors. It is an important method for examing patients with or suspeoted HCC clinically.
出处
《中国医学影像学杂志》
CSCD
2002年第3期176-178,共3页
Chinese Journal of Medical Imaging
