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Radiology. 1994 Sep;192(3):717-22.

Evaluation of cerebral aneurysms with helical CT: correlation with conventional angiography and MR angiography.

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1
Department of Radiology, Brigham and Women's Hospital, Boston, MA 02115.

Abstract

PURPOSE:

To evaluate detection of intracranial aneurysms with helical computed tomography (CT) and compare the results with those of conventional angiography and magnetic resonance (MR) angiography.

MATERIALS AND METHODS:

Twenty-one patients with 30 intracranial aneurysms were studied with helical CT and conventional angiography; 17 of the patients (24 aneurysms) also underwent MR angiography.

RESULTS:

All aneurysms 3 mm or larger in greatest dimension were seen with helical CT and MR angiography; no aneurysms smaller than 3 mm were apparent with either modality. Of the 21 aneurysms demonstrated with both helical CT and MR angiography, 11 were seen equally well with both techniques; six were seen better with helical CT owing to flow-related or motion artifact at MR angiography, and four were seen better with MR angiography because calcium partially obscured them at helical CT.

CONCLUSION:

Helical CT is a promising noninvasive method of imaging the intracranial vasculature and is comparable with standard MR angiographic techniques in demonstrating aneurysms.

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