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Impact of an abdominal belt on breathing patterns to improve the quality of whole-heart coronary magnetic resonance angiography: comparison between UK and Japan
© Ishida et al; licensee BioMed Central Ltd. 2011
Published: 2 February 2011
Navigator techniques allow the patient to breath freely during a whole heart coronary magnetic resonance angiography (WHCMRA) scan. However, long measuring times, caused by the necessity to synchronize the cardiac and the breathing cycle, and complex motion patterns lead to the suboptimal image quality. To overcome this problem, an abdominal belt (BELT), which can suppress the abdominal breathing motion and, thus, improve WHCMRA image quality, has been suggested by a Japanese group1. However, its feasibility has never been shown for a Western population.
The purpose of this study was to investigate whether the abdominal belt has similar impact on breathing patterns in UK and Japanese patient populations.
30 patients (15 British and 15 Japanese) were evaluated (Achieva, 1.5T, Philips Medical Systems). Five real time navigators were used to collect motion parameters: right and left diaphragmatic cranio-caudal (CC), right thoracic anterior-posterior (AP), right thoracic left-right (LR) and upper abdominal wall AP. Measurements were performed in the supine position with free breathing for one minute before and after a tight-fitting BELT wrapped around the patient’s abdomen. End expiratory position (EEP), end inspiratory position (EIP) and end expiratory duration (EED) for the right diaphragm, and respiratory rate (RR) were obtained. Scan efficiency was calculated from the duration within the 5mm gating window per minute and heart rate
The current results indicated that the scan efficiency significantly increased by using the BELT both in British and Japanese patients and suggested that application of a BELT can improve WHCMRA image quality in a Western patient population similar to the Japanese results.
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.