医学
时间分辨率
图像质量
迭代重建
重建算法
毫秒
算法
断层摄影术
放射科
狭窄
心脏成像
数字增强无线通信
核医学
人工智能
图像(数学)
光学
物理
计算机科学
无线
电信
天文
作者
John W. Nance,Gorka Bastarrika,Doo Kyoung Kang,Balázs Ruzsics,Sebastian Vogt,Bernhard Schmidt,Rainer Raupach,Thomas Flohr,U. Joseph Schoepf
出处
期刊:Journal of Computer Assisted Tomography
[Ovid Technologies (Wolters Kluwer)]
日期:2011-01-01
卷期号:35 (1): 119-125
被引量:33
标识
DOI:10.1097/rct.0b013e3181f87475
摘要
Dual-energy computed tomography (DECT) has been proposed for the comprehensive assessment of coronary artery stenosis and myocardial perfusion yet traditionally required reducing the temporal resolution of cardiac studies. We evaluated a reconstruction algorithm that preserves high temporal resolution at cardiac DECT.Twelve consecutive patients (3 women; mean [SD] age, 64 [10] years) with an abnormal single photon emission CT result underwent invasive coronary angiography and cardiac DECT. Dual-energy CT studies were reconstructed using the standard algorithm with 165-millisecond temporal resolution and a hybrid algorithm providing 83-millisecond temporal resolution. These studies were rated for coronary image quality and motion artifacts and compared with invasive coronary angiographic studies.One hundred sixty-eight coronary artery segments (82%) were evaluated. The standard 165-millisecond reconstruction provided 95% diagnostic segments compared with 100% using the 83-millisecond hybrid reconstruction. Image quality was rated significantly (P < 0.05) better with hybrid reconstruction and had 91.4% sensitivity, 94.7% specificity, 82.1% positive predictive value, and 97.7% negative predictive value for detecting significant stenosis versus 85.7%, 93.2%, 76.9%, and 96.1% with standard reconstruction, respectively.Hybrid image reconstruction mitigates the former limitations in temporal resolution of cardiac DECT.
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