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Abstract

Subtraction CT angiography with controlled-orbit helical scanning for detection of intracranial aneurysms.

S Imakita, Y Onishi, T Hashimoto, S Motosugi, S Kuribayashi, M Takamiya, N Hashimoto, T Yamaguchi and T Sawada
American Journal of Neuroradiology February 1998, 19 (2) 291-295;
S Imakita
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Y Onishi
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T Hashimoto
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S Motosugi
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S Kuribayashi
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M Takamiya
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N Hashimoto
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T Yamaguchi
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T Sawada
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Abstract

PURPOSE Our goal was to evaluate the utility of subtraction three-dimensional CT angiography for the detection of intracranial aneurysms.

METHODS Thirty-six patients with intracranial aneurysms were examined using newly devised controlled-orbit helical scanning and conventional angiography. Three-dimensional CT angiograms and subtraction 3-D CT angiograms were compared with conventional angiograms for their characterization of intracranial aneurysms.

RESULTS Fifty aneurysms were depicted on conventional angiograms, of which 48 (96%) were seen on the 3-D CT angiograms. Three-dimensional CT angiography was superior or equivalent to conventional angiography for depicting the shape, direction, and location of 33 (66%) of 50 aneurysms; however, it was often less useful than conventional angiography in delineating intracranial aneurysms adjacent to bone. Subtraction 3-D CT angiograms were obtained in 32 patients with a total of 46 aneurysms (in four cases, aneurysms were not depicted owing to excessive motion artifacts), and were superior or equivalent to conventional angiograms in all 46 cases.

CONCLUSIONS Subtraction 3-D CT angiography with the use of controlled-orbit helical scanning is effective in the detection of intracranial aneurysms.

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American Journal of Neuroradiology
Vol. 19, Issue 2
1 Feb 1998
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Subtraction CT angiography with controlled-orbit helical scanning for detection of intracranial aneurysms.
S Imakita, Y Onishi, T Hashimoto, S Motosugi, S Kuribayashi, M Takamiya, N Hashimoto, T Yamaguchi, T Sawada
American Journal of Neuroradiology Feb 1998, 19 (2) 291-295;

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Subtraction CT angiography with controlled-orbit helical scanning for detection of intracranial aneurysms.
S Imakita, Y Onishi, T Hashimoto, S Motosugi, S Kuribayashi, M Takamiya, N Hashimoto, T Yamaguchi, T Sawada
American Journal of Neuroradiology Feb 1998, 19 (2) 291-295;
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