PMID: 8607060Feb 1, 1996Paper

Neuroimaging studies of postobliteration nidus changes in cerebral arteriovenous malformations treated by gamma knife radiosurgery

Surgical Neurology
M YamamotoL Steiner

Abstract

Following radiosurgical treatment, the majority of patients with arteriovenous malformations (AVMs) are periodically examined by means of computed tomography (CT) and magnetic resonance imaging (MRI) to assess the attainment of nidus obliterations, as well as adverse radiation effects in the surrounding brain. However, few neuroimaging studies of the long-term results following complete obliterations, confirmed by angiography, have been published to date. CT, MRI, magnetic resonance (MR) angiographic and angiographic images, obtained after angiographic confirmation of complete nidus obliteration, were reviewed in 11 AVM patients treated with gamma knife radiosurgery. The period between angiographic confirmation of nidus obliteration and these most recent examinations was 12-84 months (mean, 29 months). In ten patients who were assessed by CT, the obliterated nidus was shown to be isodense (eight cases). A significant time-related decrease in contrast enhancement was observed within 1 to 2 postobliteration years (five/seven cases). Eight patients were evaluated by MRI. On T1-weighted imaging, the nidus was shown to be hypointense (six cases) or a mixture of hypointense and isointense areas (two cases). On T2-weighted imaging, ni...Continue Reading

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Citations

Mar 4, 2000·Surgical Neurology·E Pozzati
Dec 28, 1999·Magnetic Resonance Imaging·M EssigW A Kaiser
Nov 20, 2010·Stroke; a Journal of Cerebral Circulation·Bharathi D JagadeesanTammie L S Benzinger
Jun 6, 2000·Journal of Neurosurgery·S MaesawaL D Lunsford
Aug 27, 2010·Neurology India·Uttam GeorgeArun Kumar Gupta
Oct 17, 2009·Neurosurgery·Eiichi IshikawaAkira Matsumura
Jul 2, 2009·Korean Journal of Radiology : Official Journal of the Korean Radiological Society·Kyoung Eun LeeDo Hoon Kwon

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