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

被引：105

作者：

Watanabe, Yoshiyuki ^{[1
,2
]}

Uotani, Kensuke ^{[2
]}

Nakazawa, Tetsuro ^{[2
]}

Higashi, Masahiro ^{[2
]}

Yamada, Naoaki ^{[2
]}

Hori, Yoshiro ^{[2
]}

Kanzaki, Suzu ^{[2
]}

Fukuda, Tetsuya ^{[2
]}

Itoh, Toshihide ^{[3
]}

Naito, Hiroaki ^{[2
]}

机构：

[1] St Lukes Int Hosp, Dept Radiol, Chuo Ku, Tokyo 1048565, Japan

[2] Natl Cardiovasc Ctr, Dept Radiol, Osaka, Japan

[3] Siemens Asahi Med Technol, Tokyo, Japan

来源：

EUROPEAN RADIOLOGY | 2009年 / 19卷 / 04期

关键词：

Cerebral CTA; Dual-energy CT; Dual-source CT; Bone elimination; Brain; COMPUTED-TOMOGRAPHY; SUBARACHNOID HEMORRHAGE; INITIAL-EXPERIENCE; DISEASE; DIFFERENTIATION; VESSELS;

D O I：

10.1007/s00330-008-1213-5

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

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 (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.

引用

页码：1019 / 1024

页数：6

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