3D coronary MR angiography in multiple breath-holds using a respiratory feedback monitor.
To reduce respiratory blur and ghosts in 3D coronary imaging, a data acquisition scheme using consistent multiple breath-holds was implemented. A navigator echo was acquired and processed in real time to dynamically measure diaphragm position. This information was provided as a visual prompt to the patient to maintain consistency in breath-hold levels such that the variation range of diastolic heart position was less than 2 mm. Preliminary results indicate that this multiple breath-hold acquisition scheme, compared with acquisition under respiration, can significantly reduce blur and ghost artifacts in 3D coronary imaging.
Wang
Y
Y
Mayo Clinic, Rochester, MN 55905, USA.
Grimm
R C
RC
Rossman
P J
PJ
Debbins
J P
JP
Riederer
S J
SJ
Ehman
R L
RL
D000328:Adult; D016477:Artifacts; D003331:Coronary Vessels / Q000033:anatomy & histology*; D004562:Electrocardiography; D005246:Feedback; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic / Q000379:methods*; D012119:Respiration