| Detection of unruptured cerebral artery aneurysms by MRA at 3.0 tesla: comparison with multislice helical computed tomographic angiography. | |
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MedLine Citation:
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PMID: 21525105 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Background Computed tomographic angiography (CTA) has become the primary non-invasive method for detection of cerebral artery aneurysms in many neurovascular centers. Purpose To compare MR-angiography at a 3.0 tesla (3T) scanner to CTA in the detection of unruptured intracranial aneurysms. Material and Methods CTA and 3T MRA data from 60 patients were evaluated. CTA was obtained with a 4-16-row helical CT-scanner after administration of 120 cc intravenous contrast agent, MRA was performed by a 3T MR-scanner using time-of-flight pulse sequence. Results Fifty-five cerebral artery aneurysms were detected by MRA and 47 aneurysms by CTA. Most of the aneurysms detected by MRA but not by CTA were small internal carotid artery (ICA) aneurysms. Bone structures and venous enhancement deteriorated CTA accuracy, especially in skull base. In one patient a fairly large anterior communicating artery aneurysm was not visible in MRA due to spin saturation, although it was clearly visualized in CTA. After contrast injection the aneurysm was also seen in MRA. Although the overall image quality of MRA and CTA were comparable, MRA was more susceptible to artifacts and thus re-formatted surface-shaded volume rendered 3-dimensional images of aneurysms from MRA were inferior compared to those from CTA. Conclusion MRA at 3T appears to be at least as sensitive as CTA in the detection of unruptured cerebral artery aneurysms, however image quality control is crucial and contrast agent enhances visualization of complex and large aneurysms. |
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Authors:
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Jussi Numminen; Antti Tarkiainen; Mika Niemelä; Matti Porras; Juha Hernesniemi; Marko Kangasniemi |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-4-27 |
Journal Detail:
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Title: Acta radiologica (Stockholm, Sweden : 1987) Volume: - ISSN: 1600-0455 ISO Abbreviation: - Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-4-28 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8706123 Medline TA: Acta Radiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Radiology, Helsinki Medical Imaging Center, Helsinki University Central Hospital, Helsinki. |
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