Automated determination of cardiac rest period on whole-heart coronary magnetic resonance angiography by extracting high-speed motion of coronary arteries
| Autor: | Hiroya Asou, Tomoyasu Sato, Naoyuki Imada, Katsuhiro Ichikawa, Yuichi Nishiyama |
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| Rok vydání: | 2018 |
| Předmět: |
Adult
Male Systematic difference Image quality Rest Coronary Angiography 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Cardiac motion Heart rate medicine Humans Radiology Nuclear Medicine and imaging Prospective Studies Aged Coronary magnetic resonance angiography business.industry Middle Aged Coronary Vessels Speed (motion) Healthy Volunteers Coronary arteries Rest period medicine.anatomical_structure business Nuclear medicine 030217 neurology & neurosurgery Magnetic Resonance Angiography |
| Zdroj: | Clinical imaging. 52 |
| ISSN: | 1873-4499 |
| Popis: | The aim of the present study was to develop an automated system for determining the cardiac rest period during whole-heart coronary magnetic resonance angiography (CMRA) examination.Ten healthy male volunteers (25-51 years old, 50-77 beats/min heart rate) were enrolled in this prospective study. A motion area map was generated from a cine image set by extracting high-speed component of cardiac motion, and it was used to specify the rest period in the proposed CMRA. In conventional CMRA, the rest period was determined based on the visual inspection of cine images. Agreement of the start time, end time, and trigger time between the two methods was assessed by the Bland-Altman plot analysis. Two observers visually evaluated the quality of the curved planar reformation (CPR) image of the coronary arteries.The proposed method significantly prolonged the start time (mean systematic difference 37.7 ms, P 0.05) compared with the conventional method. Good agreement was observed for the end time (mean systematic difference 8.9 ms) and trigger time (mean systematic difference -28.8 ms) between the two methods. A significantly higher image quality (P 0.05) was provided for the left circumflex artery in the proposed CMRA (mean grading score 3.88) than in conventional CMRA (mean grading score 3.68).Our system enabled detection of the rest period automatically without operator intervention and demonstrated somewhat higher image quality compared with conventional CMRA. Its use may be useful to improve the imaging workflow for CMRA in clinical practice. |
| Databáze: | OpenAIRE |
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