A comparison of prospective and retrospective respiratory navigator gating in 3D MR coronary angiography.
A comparison between the prospective and retrospective respiratory navigator gating in MR coronary angiography was performed with eight normal subjects. A three-dimensional (3D) ECG-gated fast gradient echo pulse sequence was used for image data acquisition. The results show that the MR coronary angiography obtained using retrospective gating retains a considerable amount of motion artifacts. In this study, the images acquired using prospective navigator gating demonstrated significantly reduced motion artifacts (p = 0.009), improved vessel visibility (p = 0.021) with reduced imaging time (p = 0.013) compared to the images obtained using retrospective navigator gating.
Du
Y P
YP
Applied Science Lab, GE-Medical Systems, Milwaukee, Wisconsin, USA. yipingdu@uchicago.edu
McVeigh
E R
ER
Bluemke
D A
DA
Silber
H A
HA
Foo
T K
TK
D000328:Adult; D001158:Arteries / Q000648:ultrastructure; D016477:Artifacts; D017023:Coronary Angiography; D003331:Coronary Vessels / Q000648:ultrastructure; D006801:Humans; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D009038:Motion; D011446:Prospective Studies; D011856:Radiographic Image Enhancement; D012016:Reference Values; D012132:Respiratory Muscles / Q000000981:diagnostic imaging* / Q000502:physiology*; D012189:Retrospective Studies