MR流动补偿技术在诊断颅内巨大动脉瘤中的价值

目的：观察MR流动补偿技术对颅内巨大动脉瘤MRI表现的影响，评价该技术在临床中的应用。资料与方法：搜集35例经手术病理证实的颅内巨大动脉瘤，均行使用和未使用流动补偿技术T1WI检查，重点观察动脉瘤的残腔和血栓和MRI表现。结果：颅内巨大动脉瘤的MR信号表现多样，主要与动脉瘤内是否出现血栓及其大小，形成时间的长短和动脉瘤引起的继发性改变等因素有关。使用流动补偿技术使残腔信号增高，有助于明确动脉瘤残腔的位置和大小。动脉瘤壁血栓信号差异很大，多呈层状或涡状的混杂信号。流动补偿技术对闭塞动脉瘤和瘤内血栓的信号没有影响。结论：MRI可清楚显示颅内巨大动脉瘤的残腔和血栓形成情况，使用流动补偿技术可以明确动脉瘤残腔的位置，提高诊断的特异性。

Evaluation of Flow Compensation Technique in the Diagnosis of Giant Intracranial Aneurysm

Objective To evaluate MR flow compensation technique in the diagnosis of giant intracranial aneurysm (GIA).Materials and Methods Both T 1WI with and T 1WI without flow compensation technique were performed in 35 patients with pathologically proved GIA. Observation was focused on the residual lumen and the thrombosis of the aneurysm.Results GIA carried a variety of MR findings, mainly depending on the presence, size and age of the thrombosis, as well as the secondary changes caused by GIA. On T 1WI, flow compensation technique increased the signal intensity of slow flow in the residual lumen of GIA, while had no effect on the signal of thrombosis.Conclusion The residual lumen and thrombosis of GIA can be easily identified by comparing T 1WI using flow compensation technique with T 1WI not using flow compensation technique.