Quantitative analysis of 1.5-T whole-heart coronary MR angiograms obtained with 32-Channel cardiac coils: A comparison with conventional quantitative coronary angiography

Masato Yonezawa, Motonori Nagata, Kakuya Kitagawa, Shingo Kato, Yeonyee Yoon, Hiroshi Nakajima, Shiro Nakamori, Hajime Sakuma, Masamitsu Hatakenaka, Hiroshi Honda

    研究成果: Contribution to journalArticle査読

    18 被引用数 (Scopus)

    抄録

    Purpose: To develop a method to determine significant stenosis at wholeheart coronary magnetic resonance (MR) angiography and to evaluate the accuracy and reproducibility of this approach. Materials and Methods: The institutional review board approved the study, and all participants provided written informed consent. Sixty-two patients who were suspected of having coronary artery disease (CAD) and were scheduled for conventional coronary angiography were included. Coronary MR angiography was performed by using a 1.5-T imager with 32-channel coils. Luminal narrowing was evaluated with quantitative analysis (QA) of coronary MR angiograms on the basis of the signal intensity profile along the vessel. Percentage stenosis with QA of coronary MR angiograms was calculated as [1 - (SImin/SIref)] × 100, where SImin is minimal signal intensity and SIref is corresponding reference signal intensity. Diagnostic performance of QA of coronary MR angiograms for predicting at least a 50% reduction in diameter was evaluated by using quantitative coronary angiography (QCA), with conventional angiography findings serving as the reference standard. Receiver operating characteristic (ROC) analysis, Spearman rank correlation, Bland-Altman analysis, and Cohen κ analysis were used. Results: The areas under the ROC curve in a segment-based analysis for detecting significant CAD were 0.96 (95% confidence interval [CI]: 0.94, 0.98) with QA of coronary MR angiograms and 0.93 (95% CI: 0.88, 0.98) with visual assessment. The correlation coefficients between percentage stenosis with QA of coronary MR angiograms and percentage stenosis with QCA were 0.84 (P < .001), 0.80 (P < .001), and 0.66 (P < .001) in the patient-, vessel-, and segment-based analyses, respectively. Conclusion: QA of coronary MR angiograms with use of a signal intensity profile along the vessel permits detection of CAD. This method had a diagnostic performance approximately equal to that of visual analysis of coronary MR angiograms with high inter- and intraobserver reliability, allowing for more objective interpretation of coronary MR angiography findings.

    本文言語英語
    ページ(範囲)356-364
    ページ数9
    ジャーナルRadiology
    271
    2
    DOI
    出版ステータス出版済み - 5 2014

    All Science Journal Classification (ASJC) codes

    • 放射線学、核医学およびイメージング

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