title: Experimental evaluation of dual acceptance window weighting function for right coronary MR angiography at 3.0T.
abstract: To shorten scanning time and increase the feasibility of experimental results, we performed right coronary artery magnetic resonance angiography (CMRA) at 3.0 T using dual acceptance window weighting function in 25 normal subjects. We examined these subjects using conventional navigator with fixed gating window and 6 dual acceptance window weighted gating (DAWG) sequences with different central weighted ratio (CWR). Compared with the conventional navigator sequence, DAWG sequences with CWRs of 20% and 25% increased the scanning efficiency by 30% and 26% respectively (P<.05), while maintaining good image quality; further the corresponding scanning time decreased from 2.12-1.64 and 1.69 min, respectively (P<.05). However, CWRs less than 15% caused image degradation to some extent. The coronary artery lengths and diameters did not show statistically significant differences between the two techniques (P>.05). Briefly, to avoid the problems caused by low navigator efficiency and to maintain comparable image quality, the weighted gating parameters of 3 mm width central acceptance window and 15 mm width outer acceptance window with CWR between 20% and 25% are recommended for right CMRA at 3 T.
authors.affiliation: Institute of Heavy Ion Physics, Beijing Key Laboratory of Medical Physics and Engineering, Physics school, Peking University, Beijing 100871, China.
authors.forename: Xuna
authors.initials: X
authors.lastname: Zhao
authors.forename: Min
authors.initials: M
authors.lastname: Chen
authors.forename: Chen
authors.initials: C
authors.lastname: Zhang
authors.forename: Shuguang
authors.initials: S
authors.lastname: Hu
authors.forename: Donglin
authors.initials: D
authors.lastname: Zu
mesh_terms: D000328:Adult; D017023:Coronary Angiography / Q000379:methods*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D015588:Observer Variation; D012016:Reference Values; D015203:Reproducibility of Results; D013997:Time Factors; D055815:Young Adult