RT Journal Article SR Electronic T1 NMR imaging in the recognition of giant intracranial aneurysms. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 835 OP 836 VO 4 IS 3 A1 Worthington, B S A1 Kean, D M A1 Hawkes, R C A1 Holland, G N A1 Moore, W S A1 Corston, R YR 1983 UL http://www.ajnr.org/content/4/3/835.abstract AB Most giant aneurysms present clinically as intracranial mass lesions. Many contain an organized lamellated thrombus with only a small eccentric lumen remaining that can be opacified at angiography. Four patients with such aneurysms were studied using flow-dependent nuclear magnetic resonance scanning sequences. The aneurysms show a smooth rounded margin, and the thrombus within is clearly distinguishable from the blood flowing through the patent lumen, which gives a low signal. By using different scan sequences it is possible to prove that the area of low signal is indeed fluid in rapid motion, thus confirming the diagnosis.