Assessment of myocardial delayed enhancement with cardiac computed tomography in cardiomyopathies: a prospective comparison with delayed enhancement cardiac magnetic resonance imaging

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作者
Hye-Jeong Lee
Dong Jin Im
Jong-Chan Youn
Suyon Chang
Young Joo Suh
Yoo Jin Hong
Young Jin Kim
Jin Hur
Byoung Wook Choi
机构
[1] Yonsei University College of Medicine,Department of Radiology, Research Institute of Radiological Science, Severance Hospital
[2] Yonsei University College of Medicine,Division of Cardiology, Cardiovascular Hospital, Severance Hospital
关键词
Cardiomyopathy; Myocardial delayed enhancement; Myocardial fibrosis; Cardiac computed tomography; Cardiac magnetic resonance imaging;
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摘要
To evaluate the feasibility of cardiac CT for the evaluation of myocardial delayed enhancement (MDE) in the assessment of patients with cardiomyopathy, compared to cardiac MRI. A total of 37 patients (mean age 54.9 ± 15.7 years, 24 men) who underwent cardiac MRI to evaluate cardiomyopathy were enrolled. Dual-energy ECG-gated cardiac CT was acquired 12 min after contrast injection. Two observers evaluated cardiac MRI and cardiac CT at different kV settings (100, 120 and 140 kV) independently for MDE pattern-classification (patchy, transmural, subendocardial, epicardial and mesocardial), differentiation between ischemic and non-ischemic cardiomyopathy and MDE quantification (percentage MDE). Kappa statics and the intraclass correlation coefficient were used for statistical analysis. Among different kV settings, 100-kV CT showed excellent agreements compared to cardiac MRI for MDE detection (κ = 0.886 and 0.873, respectively), MDE pattern-classification (κ = 0.888 and 0.881, respectively) and differentiation between ischemic and non-ischemic cardiomyopathy (κ = 1.000 and 0.893, respectively) for both Observer 1 and Observer 2. The Bland–Altman plot between MRI and 100-kV CT for the percentage MDE showed a very small bias (−0.15%) with 95% limits of agreement of −7.02 and 6.72. Cardiac CT using 100 kV might be an alternative method to cardiac MRI in the assessment of cardiomyopathy, particularly in patients with contraindications to cardiac MRI.
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页码:577 / 584
页数:7
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