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01-04-2009 | Neuro

Dual-energy direct bone removal CT angiography for evaluation of intracranial aneurysm or stenosis: comparison with conventional digital subtraction angiography

Authors: Yoshiyuki Watanabe, Kensuke Uotani, Tetsuro Nakazawa, Masahiro Higashi, Naoaki Yamada, Yoshiro Hori, Suzu Kanzaki, Tetsuya Fukuda, Toshihide Itoh, Hiroaki Naito

Published in: European Radiology | Issue 4/2009

Abstract

Dual-energy CT can be applied for bone elimination in cerebral CT angiography (CTA). The aim of this study was to compare the results of dual-energy direct bone removal CTA (DE-BR-CTA) with those of digital subtraction angiography (DSA). Twelve patients with intracranial aneurysms and/or ICA stenosis underwent a dual-source CT in dual-energy mode. Post-processing software selectively removed bone structures using the two energy data sets. Three-dimensional images with and without bone removal were reviewed and compared to DSA. Dual-energy bone removal was successful in all patients. For 10 patients, bone removal was good and CTA maximum-intensity projection (MIP) images could be used for vessel evaluation. For two patients, bone removal was moderate with some bone remnants, but this did not inhibit the three-dimensional visualization. Three aneurysms adjacent to the skull base were only partially visible in conventional CTA but were fully visible in DE-BR-CTA. In five patients with ICA stenosis, DE-BR-CTA revealed the stenotic lesions on the MIP images. The correlation between DSA and DE-BR-CTA was good (R ²=0.822), but DE-BR-CTA led to an overestimation of stenosis. DE-BR-CTA was able to eliminate bone structure using only a single CT data acquisition and is useful to evaluate intracranial aneurysms and stenosis.

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Title: Dual-energy direct bone removal CT angiography for evaluation of intracranial aneurysm or stenosis: comparison with conventional digital subtraction angiography
Authors: Yoshiyuki Watanabe
Kensuke Uotani
Tetsuro Nakazawa
Masahiro Higashi
Naoaki Yamada
Yoshiro Hori
Suzu Kanzaki
Tetsuya Fukuda
Toshihide Itoh
Hiroaki Naito
Publication date: 01-04-2009
Publisher: Springer-Verlag
Published in: European Radiology / Issue 4/2009
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI: https://doi.org/10.1007/s00330-008-1213-5

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Dual-energy direct bone removal CT angiography for evaluation of intracranial aneurysm or stenosis: comparison with conventional digital subtraction angiography

Abstract

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Abstract

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