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JACC Cardiovasc Imaging. 2013 Oct;6(10):1095-1104. doi: 10.1016/j.jcmg.2013.04.014. Epub 2013 Sep 4.

OCT compared with IVUS in a coronary lesion assessment: the OPUS-CLASS study.

Author information

1
Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan.
2
Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan. Electronic address: akasat@wakayama-med.ac.jp.
3
Division of Cardiovascular Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.
4
Department of Cardiology, Toyohashi Heart Center, Toyohashi, Japan.
5
First Department of Internal Medicine, Nara Medical University, Kashihara, Japan.
6
Department of Cardiology, Key Laboratories of Education Ministry for Myocardial Ischemia Mechanism and Treatment, 2nd Affiliated Hospital of Harbin Medical University, Harbin, People's Republic of China.
7
Department of Medicine, Teikyo University School of Medicine, Tokyo, Japan.
8
Lightlab Imaging/St. Jude Medical, Westford, Massachusetts.

Abstract

OBJECTIVES:

The aim of this study was to investigate the reliability of frequency domain optical coherence tomography (FD-OCT) for coronary measurements compared with quantitative coronary angiography (QCA) and intravascular ultrasound (IVUS).

BACKGROUND:

Accurate luminal measurement is expected in FD-OCT because this technology offers high resolution and excellent contrast between lumen and vessel wall.

METHODS:

In 5 medical centers, 100 patients with coronary artery disease were prospectively studied by using angiography, FD-OCT, and IVUS. In addition, 5 phantom models of known lumen dimensions (lumen diameter 3.08 mm; lumen area 7.45 mm(2)) were examined using FD-OCT and IVUS. Quantitative image analyses of the coronary arteries and phantom models were performed by an independent core laboratory.

RESULTS:

In the clinical study, the mean minimum lumen diameter measured by QCA was significantly smaller than that measured by FD-OCT (1.81 ± 0.72 mm vs. 1.91 ± 0.69 mm; p < 0.001) and the minimum lumen diameter measured by IVUS was significantly greater than that measured by FD-OCT (2.09 ± 0.60 mm vs. 1.91 ± 0.69 mm; p < 0.001). The minimum lumen area measured by IVUS was significantly greater than that by FD-OCT (3.68 ± 2.06 mm(2) vs. 3.27 ± 2.22 mm(2); p < 0.001), although a significant correlation was observed between the 2 imaging techniques (r = 0.95, p < 0.001; mean difference 0.41 mm(2)). Both FD-OCT and IVUS exhibited good interobserver reproducibility, but the root-mean-squared deviation between measurements was approximately twice as high for the IVUS measurements compared with the FD-OCT measurements (0.32 mm(2) vs. 0.16 mm(2)). In a phantom model, the mean lumen area according to FD-OCT was equal to the actual lumen area of the phantom model, with low SD; IVUS overestimated the lumen area and was less reproducible than FD-OCT (8.03 ± 0.58 mm(2) vs. 7.45 ± 0.17 mm(2); p < 0.001).

CONCLUSIONS:

The results of this prospective multicenter study demonstrate that FD-OCT provides accurate and reproducible quantitative measurements of coronary dimensions in the clinical setting.

KEYWORDS:

FD; IVUS; MLA; MLD; OCT; PCI; QCA; TD; coronary angiography; frequency domain; intravascular ultrasound; minimum lumen area; minimum lumen diameter; optical coherence tomography; percutaneous coronary intervention; quantitative coronary angiography; time-domain

Comment in

PMID:
24011777
DOI:
10.1016/j.jcmg.2013.04.014
[Indexed for MEDLINE]
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