A study of in vitro and in vivo MR of free-breathing whole-heart 3D coronary angiography using parallel imaging.
To evaluate parallel-imaging methods in free-breathing whole-heart 3D coronary magnetic resonance angiography and assess the navigator techniques and visualization rates of the major coronary arteries. We compared key parameters of the generalized autocalibrating partially parallel acquisition and modified sensitive encoding images in vitro phantom MRI; performed the MRA with GRAPPA parallel imaging in healthy volunteers; compared 1D- and 2D-prospective acquisition correction and analyzed the differences; and evaluated the visualization of major coronary arterial branches. GRAPPA images had higher signal-to-noise ratio and contrast-to-noise ratio and fewer aliasing artifacts. The coronary arteries were adequately visualized in 38 volunteers. 2D-PACE had a higher navigator efficiency, shorter scan time, and gave clearer reconstructed images in comparison with 1D-PACE. GRAPPA images were superior to mSENSE images. Whole-heart 3D coronary MRA along with parallel-imaging technique is a potential clinical method, and 2D-PACE is a better navigation technique than 1D-PACE.
Jin
Hang
H
Department of Radiology, Zhongshan Hospital, Fudan University and Shanghai Medical Imaging Institute, 180#, Feng Lin Road, 200032 Shanghai, China. hangjin08@hotmail.com
Zeng
Meng-Su
MS
Ge
Mei-Ying
MY
Yang
Shan
S
Chen
Cai-Zhong
CZ
Shen
Ji-Zhang
JZ
Li
Ren-Chen
RC
D000328:Adult; D016477:Artifacts; D017023:Coronary Angiography / Q000295:instrumentation / Q000379:methods*; D003331:Coronary Vessels / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D007090:Image Interpretation, Computer-Assisted; D021621:Imaging, Three-Dimensional; D018810:Magnetic Resonance Angiography / Q000295:instrumentation; D008297:Male; D008875:Middle Aged; D019047:Phantoms, Imaging; D011237:Predictive Value of Tests; D012016:Reference Values; D012119:Respiration; D055815:Young Adult