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  • Workshop presentation
  • Open Access

The clinical utility of contrast enhanced whole-heart coronary MRA with 32-channel coil at 3T scanner in the era of 64 and more-slice CT

  • 1, 2,
  • 1, 2,
  • 1, 2,
  • 3, 2 and
  • 1
Journal of Cardiovascular Magnetic Resonance201315 (Suppl 1) :W28

https://doi.org/10.1186/1532-429X-15-S1-W28

  • Published:

Keywords

  • Congenital Heart Disease
  • Kawasaki Disease
  • Gadobenate Dimeglumine
  • Complex Congenital Heart Disease
  • Anomalous Coronary Artery

Background

Sixty-four and more-slice cardiac CT provides rapid and high quality coronary CT angiography for the majority of clinical needs of non-invasive evaluation of coronary artery. However, the recent advance of whole-heart coronary MRA has been able to provide high-quality of coronary MRA and also myocardial image in a reasonable scan time. The purpose of this study was to evaluate the clinical indication and the feasibility of coronary MRA with 32-channel coil at 3T scanner.

Methods

Acquisition of 3.0T coronary MRA data was done by using 32-channel torso coil (Skyra, Siemens AG Healthcare, Erlangen, Germany). An ECG-triggered, respiratory navigator-gated, inversion-recovery prepared, segmented gradient-echo sequence was used for image acquisition with an acceleration factor of 3 in the phase-encoding direction using generalized auto calibrating partially parallel acquisitions reconstruction. Slow infusion of 0.15 mmol/kg body weight of Gadobenate dimeglumine (MultiHance; Bracco Imaging SpA, Milan, Italy) at a rate of 0.2 mL/s was given. The image quality of coronary MRA was scored as 4, excellent; 3, good, confident for diagnosis; 2. fair, suboptimal for diagnosis; and 1, poor, not diagnostic. The clinical impact of the examination were classified as high, major revision; medium, minor revision or confirmation and low, non contribution to clinical diagnosis and management.

Results

Totally 76 patients (median of age = 22 years, 55 male) received the examination and 71 completed. The 5 failures were due to interrupted anesthesia (N =3), unstable vital signs (N=2). The indications of the 71 examination were (1). Kawasaki disease, N= 26 ; (2). anomalous coronary artery, with or without complex congenital heart disease, N = 8; (3). assessment of coronary artery disease in young patients with familiar hyperlipidemia, N = 9 ; (4). assessment of coronary artery stenosis in patients with heavy calcification, N = 11 and (5). complete evaluation of newly onset heart failure with low risk of coronary artery disease, N = 17. The scores of image quality were 18, 42, 8, 3 for scores of 4, 3, 2, and 1, respectively. The mean image time was 8.2 min. There were additional image findings included: 1. hyper-enhancement of myocardium, N = 23; 2. myocardial wall hypertrophy, N =17; 3. myocardial wall focal thinning, N = 14; 4. functional valvular disorders, N = 7. The clinical impacts of the examination were high in 14, medium in 40 and low in 17 patients.
Figure 1
Figure 1

Pre-operation: Aabnormal origin of left coronary artery from the inferior wall of main pulmonary artery, which has patent anastomosis with right coronary artery. Postoperation (lower-right): In-plantation of left coronary artery to the aorta

Conclusions

Contrast enhanced whole-heart coronary MRA with 32-channel coil at 3T scanner has high clinical feasibility for appropriate clinical indications.

Authors’ Affiliations

(1)
Radiology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
(2)
Radiology, Faculty of Medicine, School of Medicine, National Yang Ming University, Taipei, Taiwan
(3)
Cardiology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan

Copyright

© Wu et al; licensee BioMed Central Ltd. 2013

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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