MRI动态增强扫描在肝转移瘤诊断及血供分析中的应用(附60例病例报告)

Application of Dynamic Enhanced MRI in the Diagnosis of Hepatic Metastases and Blood Supplying Evaluation (a report of 60 eases)

目的:探讨MRI动态增强扫描尤其是动脉期扫描在检测肝转移瘤中的临床意义。方法:回顾性分析60例肝转移瘤560个病灶在MRI动态增强各期的图像表现,计算平扫及动态增强各序列显示的病灶数目,分析其血供类型及强化方式。结果:肝转移瘤在动脉期、门脉期及静脉期的检出率分别为95%、87%、86%;56个富血供转移瘤仅在动脉期显示。52%的乏血供转移瘤和89%富血供转移瘤在动脉期强化更明显。周边环形强化是肝转移瘤在动脉期的主要强化方式。结论:MRI多期增强扫描,尤其动脉期扫描能够较好的检测出肝转移瘤并分析其血供类型,从而为临床治疗方案的选择及预后评价提供参考依据。

Objective ： To investigate the role of dynamic-enhanced MRI especially with arterial dominant phase scan in the diagnosis of hepatic metastases. Methods ： A retrospective study of 60 cases with 560 hepatic metastases undergone dynamic-enhanced MRJ scan was performed. The number of detected lesions was calculated, and the enhancement pattern and blood supply of these lesions were evaluated as well. Results ： The detectability of the hepatic metastases in arterial phase, portal-phase and equilibrium-phase were 95% , 87% , 86% respectively. 56 hypervascular metastases were exhibited only in arterial dominant phase. 52% hypovascular metastases and 89% hyervascular metastases were enhanced obviously in the arterial phase. The peripheral enhancement was observed in most cases, including hypervaseular and hypovascular metastases. Conclusion： Dynamic-enhanced MRI, especially the arterial dominant phase images, may help to increase the detectability of hepatic metastases and assess the blood supply of these lesions, which can provide some information for treatment and prognosis.