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为评价磁共振 (MR)动脉期和门脉期动态成像对肝癌的检测价值 ,运用快速扰向梯度回波技术对 34例患者进行了 MR动态成像。在静脉团注 GD- DTPA的时间内连续采集 ,分别在动脉期与门脉期成像并与平扫 SE- T1像、 SE-T2像对肝癌的检测数目进行比较。结果显示 :6 4个得到证实的肝细胞癌 (HCC)中 ,平扫 SE- T1像发现 5 6个 (占 88% )、SE- T2像发现 5 4个 (84% )、动脉期成像发现 5 8个 (90 % )、门静脉期成像发现 46个 (72 % )。11个 HCC仅在平扫 SE序列显示 ,8个 HCC仅在动脉期得到确认 ,1个 HCC仅在门静脉期得到确认。动态成像对非 HCC肿瘤的检出率未增加。提示动脉期和门静脉期动态成像能检测出某些 SE平扫无法检出的 HCC肿瘤 ,是对常规 MR检查方法有力补充
To assess the value of magnetic resonance (MR) arterial and portal venous dynamic imaging in the detection of liver cancer, 34 patients underwent MR dynamic imaging using fast-disturbance gradient echo technique. Continuous acquisition of GD-DTPA was performed during the arterial and portal venous phases and compared with the number of SE-T1 and SE-T2 images of hepatocellular carcinoma. RESULTS: Of the 64 confirmed hepatocellular carcinomas (HCCs), 56 (88%) were found by plain-scan SE-T1 and 54 (84%) by SE-T2, and arterial phase imaging Fifty eight (90%) had portal vein imaging and 46 (72%) had portal vein imaging. Eleven HCCs were shown only in the plain-scan SE sequence, with eight HCCs only confirmed in the arterial phase and one HCC only in the portal venous phase. The rate of dynamic imaging of non-HCC tumors did not increase. It is suggested that the dynamic imaging of arterial phase and portal phase can detect some HCC tumors that can not be detected by SE and is a powerful supplement to conventional MR examination