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Feasibility of a single-beat prospective ECG-gated cardiac CT for comprehensive evaluation of aortic valve disease using a 256-detector row wide-volume CT scanner: an initial experience

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Abstract

The aim of our study was to investigate the feasibility of single-beat prospective electrocardiogram (ECG)-gated cardiac computed tomography (CT) using a 256-detector row wide-volume CT scanner for functional and anatomical evaluation of the aortic valve (AV) and coronary arteries in patients with AV disease. A total of 50 patients who underwent cardiac CT scan with a wide-volume 256-detector row CT scanner for the evaluation of AV and aorta were retrospectively enrolled. Cardiac CT was performed using the prospective ECG-gated acquisition mode, and AV image quality was analyzed using a four-point grading system. Severity of aortic stenosis (AS) and aortic regurgitation (AR) were assessed by CT and correlated to that assessed by transthoracic echocardiography (TTE) based on kappa statistics (κ). Estimated radiation exposure was assessed. Among 50 patients, 44 underwent cardiac CT with single-beat acquisition. The median image quality score of AV was 3.0 on the systolic phase and 4.0 on the diastolic phase. Severity of AS and AR by CT showed moderate agreement with TTE. The mean effective radiation dose was 3.75 ± 1.43 mSv for CT angiography. Using 256-detector row wide-volume CT, the single-beat cardiac CT is feasible for evaluation of AV disease and the coronary arteries, with acceptable image quality and a low radiation dose of 3.75 mSv.

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Abbreviations

TTE:

Transthoracic echocardiography

AS:

Aortic stenosis

AR:

Aortic regurgitation

AVA:

Aortic valve area

ROA:

Regurgitant orifice area

DLP:

Dose-length product

mSv:

Millisieverts

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Author information

Author notes

  1. Jin Young Kim

    Present address: Department of Radiology, Dongsan Medical Center, Keimyung University College of Medicine, Daegu, South Korea

  2. Young Joo Suh

    Present address: Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Korea

Authors and Affiliations

  1. Department of Radiology, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea

    Jin Young Kim, Young Joo Suh, Suyon Chang, Dong Jin Im, Yoo Jin Hong, Hye-Jeong Lee, Jin Hur, Young Jin Kim & Byoung Wook Choi

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  1. Jin Young Kim
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Correspondence to Young Joo Suh.

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Kim, J.Y., Suh, Y.J., Chang, S. et al. Feasibility of a single-beat prospective ECG-gated cardiac CT for comprehensive evaluation of aortic valve disease using a 256-detector row wide-volume CT scanner: an initial experience. Int J Cardiovasc Imaging 34, 293–300 (2018). https://doi.org/10.1007/s10554-017-1223-y

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  • DOI: https://doi.org/10.1007/s10554-017-1223-y

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