Detection and assessment of intracranial aneurysms: value of CT angiography with shaded-surface display.

Detection and assessment of intracranial aneurysms: value of CT angiography with shaded-surface display. Research Abstract Details 

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Detection and assessment of intracranial aneurysms: value of CT angiography with shaded-surface display. Abstract Text:

E Y Liang,M Chan,J H Hsiang,S B Walkden,W S Poon,W W Lam,C Metreweli,

OBJECTIVE. The purpose of this study was to evaluate the efficacy of circle of Willis CT angiography with shaded-surface display in the detection and assessment of suspected intracranial aneurysms. MATERIALS AND METHODS. Twenty-three patients who had clinical or radiologic suspicion of intracranial aneurysms were studied prospectively with CT angiography and conventional angiography. The images were obtained and interpreted in a double-blind fashion by different radiologists. Conventional angiography, which was the reference standard in this study, diagnosed 17 aneurysms in 15 patients. The usefulness of the two types of images for surgical planning was evaluated by two neurosurgeons. RESULTS. No aneurysms were detected with either technique in eight patients. Both techniques showed 15 aneurysms in 14 patients. The maximum dimensions were less than 3.0 mm in three cases, 3.0-5.0 mm in four cases, and greater than 5.0 mm in eight cases. With conventional angiography used as the reference standard, CT angiography has one false-positive and two false-negative findings, resulting in a sensitivity of 88% (15/17) and a specificity of 89% (8/9). For 12 of 15 aneurysms, CT angiography was rated equal or superior to conventional angiography in depicting all aspects (shape, orientation, neck, and parent vessel) of the aneurysms. CONCLUSION. We were able to detect aneurysms of the circle of Willis as small as 2 mm in size. Using conventional angiography as the reference standard, CT angiography has a sensitivity of 88% and a specificity of 89% for the detection of aneurysms in the circle of Willis. In almost all cases, CT angiography was equal or superior to conventional angiography in characterizing the aneurysms for surgical planning.

Detection and assessment of intracranial aneurysms: value of CT angiography with shaded-surface display. Publishing Authors By Initials

EY Liang,M Chan,JH Hsiang,SB Walkden,WS Poon,WW Lam,C Metreweli,

For similar tomography, x-ray computed research abstracts see: tomography, x-ray computed research

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Detection and assessment of intracranial aneurysms: value of CT angiography with shaded-surface display. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: AJR. American journal of roentgenology

VOLUME: 165

Page Numbers: 1497-502

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ISSN: 0361-803X

DAY: 15

MONTH: Dec

YEAR: 1995

Detection and assessment of intracranial aneurysms: value of CT angiography with shaded-surface display. Information

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LANGUAGE: eng

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Detection and assessment of intracranial aneurysms: value of CT angiography with shaded-surface display. Keywords Mesh Terms:

KEYWORDS: Tomography, X-Ray Computed

MESH TERMS: methods

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Grant and Affiliation Information for Detection and assessment of intracranial aneurysms: value of CT angiography with shaded-surface display.

AFFILIATION: Department of Diagnostic Radiology and Organ Imaging, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT.

Country: UNITED STATES

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MEDLINETA: AJR Am J Roentgenol

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