title: Facilitated acquisition of whole-heart coronary magnetic resonance angiography with visual feedback of respiration status.
abstract: Three dimensional (3D) whole-heart (WH) coronary MR angiography (CMRA) requires an extended imaging time, but it may be reduced by providing a subject with visual feedback (VFB). Thirteen healthy volunteers were scanned and quality of 3D WH-CMRA images was compared among three scan conditions: free breathing (FB) with and without VFB (FB + VFB and FB - VFB, respectively) and multiple breath-holds with VFB (MBH + VFB). All but two subjects were able to complete all scans. The average scan times were 10.0 +/- 2.2, 10.0 +/- 2.5, and 8.2 +/- 1.3 min for FB - VFB, FB + VFB, and MBH + VFB, respectively. In the MBH + VFB condition, scan time was significantly reduced by 18% compared with both FB scans. No significant difference in image quality was observed between the FB - VFB and MBH + VFB conditions, but scores were significantly deteriorated at some segments in the FB + VFB condition. The MBH + VFB scan can be performed with a shorter scan time without failure or impairment of image quality.
authors.affiliation: Department of Diagnostic Radiology, Kyoto University Graduate School of Medicine, Sakyoku, Kyoto, Japan. tomokada@kuhp.kyoto-u.ac.jp
authors.forename: Tomohisa
authors.initials: T
authors.lastname: Okada
authors.forename: Shigehide
authors.initials: S
authors.lastname: Kuhara
authors.forename: Shotaro
authors.initials: S
authors.lastname: Kanao
authors.forename: Ayako
authors.initials: A
authors.lastname: Ninomiya
authors.forename: Saori
authors.initials: S
authors.lastname: Sato
authors.forename: Toshikazu
authors.initials: T
authors.lastname: Kamae
authors.forename: Kimio
authors.initials: K
authors.lastname: Gotoh
authors.forename: Kaori
authors.initials: K
authors.lastname: Togashi
mesh_terms: D000328:Adult; D003331:Coronary Vessels / Q000033:anatomy & histology*; D005246:Feedback; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D012119:Respiration; D018709:Statistics, Nonparametric