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

被引：0
作者：
Yoshiyuki Watanabe
Kensuke Uotani
Tetsuro Nakazawa
Masahiro Higashi
Naoaki Yamada
Yoshiro Hori
Suzu Kanzaki
Tetsuya Fukuda
Toshihide Itoh
Hiroaki Naito
机构：
[1] National Cardiovascular Center,Department of Radiology
[2] St. Luke’s International Hospital,Department of Radiology
[3] Siemens Asahi Medical Technologies,undefined
来源：
European Radiology | 2009年 / 19卷
关键词：
Cerebral CTA; Dual-energy CT; Dual-source CT; Bone elimination; Brain;
D O I：
暂无
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学科分类号：
摘要：
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 (R2=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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页码：1019 / 1024
页数：5
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