MR和CT动态扫描对小肝癌强化特征的比较研究  

Comparason of enhancement patterns of multi-c MRI and dynamic CT in small hepatocellular carcinoma

作　　者：严福华[1] 周康荣[1] 沈继章[1] 曾蒙苏[1] 杨军[1] 吴东[1] 龚静山[1] 施卫斌[1] 

机构地区：[1]复旦大学医学院附属中山医院放射科,上海200032

出　　处：《中华肿瘤杂志》2001年第5期413-416,共4页Chinese Journal of Oncology

基　　金：卫生部重点学科资助项目 ( 970 30 2 2 0 )

摘　　要：目的　前瞻性比较研究小肝癌 (SHCC)在动态MR和螺旋CT多期扫描中的强化特征 ,探讨MR优于螺旋CT的原因。方法　 5 3例SHCC患者 ,均行螺旋CT和MR动态增强扫描。螺旋CT全肝平扫后分别行动脉期、门脉期和延迟期的增强扫描。MR行SE序列和FMPSPGR序列动态增强多期扫描。结果　 5 3例患者共发现病灶 76个 ,MR和CT动脉期扫描分别有 6 9个病灶和 49个病灶有明显强化。SHCC在MR和CT动脉期 门脉期 延迟期扫描中的典型表现为高 低 低信号 (密度 )和高 等 低信号 (密度 ) ;不典型的表现为高 高 高信号 (密度 )、高 等 等信号 (密度 )和低 低 低信号 (密度 )。结论　动态MR和螺旋CT多期增强扫描均可显示SHCC的强化特征。MR动脉期扫描更能充分反映SHCC富血供的特点 ;在定性诊断方面 ,结合SE序列上的一些信号特征 ,MR更优于螺旋CT。Objective To study prospectively the enhancement features of multi phase scan of dynamic MRI and spiral CT in the diagnosis of small hepatocellular carcinoma(SHCC) and to discuss the cause of dynamic MRI being superior to spiral CT.Methods Multi phase contrast scanning of dynamic MR and spiral CT were done in 53 SHCC patients. The lesions were proved by surgery and pathology. The arterial phase, portal venous phase and delayed phase scan of spiral CT were carried out after the pre contrast scanning of the entire liver. MRI was performed with SE sequence and FMPSPGR sequence dynamic multi phase contrast scans.Results Seventy six lesions were found in 53 patients. Sixty nine lesions and 54 lesions were enhanced obviously in MR and spiral CT arterial phase scans. The typical enhancement patterns of SHCC in the arterial phase, portal venous phase and delayed phase scan of MRI and spiral CT were hyper hypo hypointense (dense) and hyperintense (hyperdense), isointense (isodense) and hypointense (hypodense). Atypical enhancement patterns were hyperintense (hyperdense), hyperintense (hyperdense), hyperintense (hyperdense), hyperintense (hyperdense), isointense (isodense), isointense (isodense) and hypointense (hypodense), hypointense (hypodense) and hypointense (hypodense).Conclusion Both dynamic MRI and spiral CT multi phase contrast scanning are able to demonstrate the enhancement features of SHCC, with arterial phase scan of MRI being superior to spiral CT in reflecting the hypervascular characterization of SHCC. Combined with SE sequence in characterizing the SHCC, MRI is better than spiral CT. [

关 键 词：肝肿瘤 诊断 肝细胞癌 动态MR 螺旋CT 

分 类 号：R735.7[医药卫生—肿瘤] R730.44[医药卫生—临床医学]