[Diagnosis of acute subarachnoid hemorrhage--MRI with 0.5 Tesla with FLAIR sequence].
OBJECTIVE
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.


METHODS
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.


RESULTS
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.


CONCLUSIONS
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.
Kopsa
W
W
Zentralröntgeninstitut, KA Rudolfstiftung.
Leitner
H
H
Perneczky
G
G
Tscholakoff
D
D
D000208:Acute Disease; D017542:Aneurysm, Ruptured / Q000175:diagnosis / Q000601:surgery; D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation*; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation; D002532:Intracranial Aneurysm / Q000175:diagnosis / Q000601:surgery; D018810:Magnetic Resonance Angiography / Q000295:instrumentation; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D015588:Observer Variation; D012680:Sensitivity and Specificity; D013345:Subarachnoid Hemorrhage / Q000175:diagnosis* / Q000601:surgery
Diagnostik der akuten Subarachnoidalblutung--MR bei 0,5 Tesla mit der FLAIR-Sequenz.