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• Clinical Article •
Comparison of free-breathing 3D coronary MR angiography using the volume-targeted and whole-heart methods
JIN Hang  ZENG Meng-su  YUN Hong  CHEN Cai-zhong 

DOI:10.3969/j.issn.1674-8034.2010.04.009.


[Abstract] Objective: To make a comparison between the RCA- and LCX-targeted and whole-heart 3D coronary MR angiography using a T2-prepared SSFP sequence with real-time navigation.Materials and Methods: Twenty-one volunteers underwent free-breathing navigator-gated 3D coronary MR angiography, including both RCA- and LCX-targeted MR angiography and whole-heart coronary MR angiography with comparable imaging parameters on a 1.5 T whole-body MR system. We compared the acquisition time, the overall image quality of each segments of RCA and LCX, measured the length of the RCA and LCX, and assessed the posterior descending arterial branches of the RCA obtained with the volume-targeted and whole-heart approaches. Statistical analysis was performed with P value less than 0.05 considered significant.Results: The imaging time required for whole-heart acquisition was significantly longer than the RCA- and LCX-targeted acquisition (whole-heart, 9.82±2.62 vs volume-targeted, 4.31±0.87 minutes; P<0.05). The depicted length of the coronary arteries were not significantly different between the whole-heart and volume-targeted coronary MR angiography (whole-heart, RCA/LCX=12.2±3.4/7.81±1.5 vs volume-targeted, RCA/LCX= 11.9±3.2/7.59±1.2 cm; P>0.05). Whole-heart method had advantages for the visualization of posterior descending artery branches derived from the RCA. However, volume-targeted method yields higher vessel sharpness and overall image quality in comparison with whole-heart acquisition (volume-targeted, RCA/LCX = 4.33±0.97/4.29±0.89 vs whole-heart, RCA/LCX=3.84±1.03/3.59±0.86; P<0.05).Conclusion: Volume-targeted and whole-heart navigator-assisted coronary MR angiography had its own advantages respectively, and the combined use of the two methods could be potentially helpful for clinical applications.
[Keywords] Magnetic resonance imaging；Coronary artery；Free-breathing；Volume-targeted；Whole-heart

JIN Hang Department of Radiology, Zhongshan Hospital, Fudan University and Shanghai Medical Imaging Institute, Shanghai 200032, China

ZENG Meng-su* Department of Radiology, Zhongshan Hospital, Fudan University and Shanghai Medical Imaging Institute, Shanghai 200032, China

YUN Hong Department of Radiology, Zhongshan Hospital, Fudan University and Shanghai Medical Imaging Institute, Shanghai 200032, China

CHEN Cai-zhong Department of Radiology, Zhongshan Hospital, Fudan University and Shanghai Medical Imaging Institute, Shanghai 200032, China

*Correspondence to: Zeng MS, E-mail: zeng.mengsu@zs-hospital.sh.cn

Conflicts of interest   None.

Received  2010-03-01
Accepted  2010-04-15
DOI: 10.3969/j.issn.1674-8034.2010.04.009
DOI:10.3969/j.issn.1674-8034.2010.04.009.

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