Kopsa W, Leitner H, Perneczky G, Tscholakoff D
Zentralröntgeninstitut, KA Rudolfstiftung.
Rofo. 1998 Oct;169(4):355-9. doi: 10.1055/s-2007-1015299.
Evaluation of MR imaging in patients with acute subarachnoid hemorrhage (SAH) at 0.5 Tesla using the FLAIR (Fluid Attenuated Inversion Recovery) sequence. Additionally, the value of MR angiography (MRA) in the diagnosis of intracranial aneurysms was assessed.
19 patients with suspected acute SAH were included in this study. MR imaging was performed using an axial FLAIR sequence and axial T1, T2 and PD weighted sequences. In 16 patients an additional MRA (3D-TOF) was performed. 10 patients without SAH were examined as a control group. At the end of the study the 29 MR examinations were randomised and the images were read by two experienced radiologists; subsequently a consensus interpretation was made.
In 16 patients an acute SAH was verified with the FLAIR sequence, in 13 cases the origin of hemorrhage was found during surgery. In the consensus interpretation of the MR images all cases were diagnosed properly. 12 of the 16 MRA studies were of diagnostic quality, but only 6 cases were interpreted correctly.
The FLAIR sequence at 0.5 Tesla proved effective in the diagnosis of acute SAH. MRA at 0.5 Tesla failed in the detection of intracranial aneurysms.
使用液体衰减反转恢复（FLAIR）序列，在0.5特斯拉场强下对急性蛛网膜下腔出血（SAH）患者进行磁共振成像（MR）评估。此外，还评估了磁共振血管造影（MRA）在颅内动脉瘤诊断中的价值。
本研究纳入19例疑似急性SAH患者。采用轴位FLAIR序列以及轴位T1、T2和质子密度加权序列进行MR成像。16例患者还进行了额外的MRA（三维时间飞跃法）检查。选取10例无SAH患者作为对照组。研究结束时，对29次MR检查进行随机分组，由两位经验丰富的放射科医生阅片；随后达成共识解读。
16例患者经FLAIR序列证实存在急性SAH，其中13例在手术中发现出血来源。在MR图像的共识解读中，所有病例均诊断正确。16例MRA检查中有12例具有诊断价值，但只有6例解读正确。
0.5特斯拉场强下的FLAIR序列在急性SAH诊断中被证明有效。0.5特斯拉场强下的MRA未能检测出颅内动脉瘤。
