Coronary MR angiography: selection of acquisition window of minimal cardiac motion with electrocardiography-triggered navigator cardiac motion prescanning--initial results.
The authors developed an electrocardiography-triggered M-mode navigator-echo technique to help monitor cardiac motion and identify the period of minimal cardiac motion in the cardiac cycle. Coronary magnetic resonance angiography was performed in eight healthy adult volunteers and one patient with heart disease. To minimize cardiac motion effects, trigger delays were estimated with the navigator-echo technique and two empirical formulas. The quality of images obtained with the different delay times was compared for clarity of depiction of the coronary arteries. Image quality was best with the delay calculated with the navigator-echo technique.
Wang
Y
Y
Departments of Radiology, Cornell University, Joan and Sanford I. Weill Medical College, 515 E 71st St, Suite S120, New York, NY 10021, USA. yiwang@med.cornell.edu
Watts
R
R
Mitchell
I
I
Nguyen
T D
TD
Bezanson
J W
JW
Bergman
G W
GW
Prince
M R
MR
D000328:Adult; D003327:Coronary Disease / Q000175:diagnosis*; D003331:Coronary Vessels / Q000473:pathology*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction; D013997:Time Factors