期刊
NEURORADIOLOGY
卷 47, 期 10, 页码 780-791出版社
SPRINGER
DOI: 10.1007/s00234-005-1424-2
关键词
subarachnoid haemorrhage; ruptured aneurysm; intracranial; contrast-enhanced magnetic resonance angiography; time-of-flight magnetic resonance angiography; digital subtraction angiography
We evaluated contrast-enhanced MR angiography (MRA) for the identification of recently ruptured cerebral aneurysms. We studied 23 aneurysms in 18 patients (age range 34-72 years) with aneurysms of the anterior (n=17) and posterior (n=6) circulation by comparing 3D time-of-flight (TOF), contrast-enhanced MRA and digital subtraction angiography (DSA). In four of 23 aneurysms, 3D-TOF did not show the lesion. Contrast-enhanced MRA successfully depicted all aneurysms except one. T1 contamination artefacts from subarachnoid or intraparenchymal haemorrhages were evident on the 3D-TOF images in six cases. The artefacts were completely eliminated on the contrast-enhanced MRA images by subtraction of the pre-contrast images. The diagnostic information in patients with subarachnoid haemorrhages (SAHs) provided by contrast-enhanced MRA was comparable to that provided by DSA.
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