Prospective navigator gating with a dual acceptance window technique to reduce respiratory motion artifacts in 3D MR coronary angiography.
A prospective navigator algorithm with a dual acceptance window (DAW) technique was developed to reduce image artifacts induced by respiratory motion without increasing imaging time. A phantom study shows that the ghost level measured by ghost-to-image ratio was reduced by 27.1 % (p < 0.005) using the DAW technique compared to the conventional single acceptance window technique. This DAW technique can also be used to reduce imaging time while maintaining comparable ghosting level.
Department of Radiology, Health Sciences Center, University of Colorado, Colorado 80262, USA. yiping.du@uchsc.edu
Yiping P
YP
Du
D000465:Algorithms; D016477:Artifacts; D003331:Coronary Vessels / Q000473:pathology*; D004562:Electrocardiography; D006801:Humans; D021621:Imaging, Three-Dimensional; D018810:Magnetic Resonance Angiography / Q000379:methods; D019047:Phantoms, Imaging; D012119:Respiration