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目的:探讨肝脏快速容积采集(Liver acquisition volume acceleration,LAVA)整合阵列空间敏感编码技术(Arrayspatial sensitivity encoding technique,ASSET)在显示肝癌血管解剖信息中的价值。方法:对42例有手术病理结果的肝癌病例的肝脏常规MR平扫及增强扫描资料进行回顾性分析。增强扫描采用LAVA整合ASSET;将LAVA采集的原始图像进行最大密度投影(Maximum intensity projection,MIP)处理并分析其对肝脏占位性病变及肝血管关系的显示情况及其整合ASSET后缩短采集时间的优势。结果同手术病理所见对照。结果:42例44个占位性病变全部清晰显示。整合ASSET后采集时间明显缩短,24例实现动脉早期和动脉期采集;18例患者实现动脉早期、动脉期和动脉晚期采集。动脉期经MIP后处理显示肿瘤血管30例,肿瘤供血动脉明显增粗、变形、移位20例,动静脉瘘1例。门脉期经MIP后处理检出肿瘤对门静脉的侵犯25例,门静脉癌栓6例。MIP显示肿瘤血管、供血动脉的来源分布及门静脉癌栓与手术病理结果基本一致。结论:LAVA整合ASSET在肝脏动态扫描中可在较短时间内获得多期高质量增强图像并提供血管解剖信息,具有较高应用价值。
Objective: To investigate the value of LAVA (Arrayspatial sensitivity encoding technique, ASSET) in displaying hepatic vascular anatomy. Methods: A retrospective analysis was performed on the data of routine liver biopsy and enhanced MRI in liver biopsy specimens from 42 patients with pathologically confirmed liver cancer. The enhanced LAVA was used to integrate the ASSET. The maximum intensity projection (MIP) was performed on the original LAVA images and analyzed for liver lesions and hepatic vascular manifestations and the ASSET shortening acquisition time Advantage. The results with the surgical pathology see control. Results: All 42 lesions in 44 cases were clearly shown. The acquisition time after ASSET integration was significantly shortened, 24 cases achieved early arterial phase and arterial phase acquisition; 18 patients achieved early arterial phase, arterial phase and late arterial phase. Arterial phase after MIP treatment showed tumor vessels in 30 cases, the tumor feeding artery significantly thickening, deformation, displacement in 20 cases, 1 case of arteriovenous fistula. Portal venous phase by MIP post-treatment detected tumor invasion of the portal vein in 25 cases, 6 cases of portal vein tumor thrombosis. MIP showed tumor blood vessels, the source of arterial blood supply and portal vein tumor thrombus and surgical pathology results are basically the same. Conclusion: LAVA ASS ASS can obtain multi-phase high-quality enhancement images and provide vascular anatomical information in dynamic scanning of liver in a short period of time, which is of great value in application.