Coronary MR angiography at 3T during diastole and systole

Purpose To investigate the impact of end‐systolic imaging on quality of right coronary magnetic resonance angiography (MRA) in comparison to diastolic and to study the effect of RR interval variability on image quality. Materials and Methods The right coronary artery (RCA) of 10 normal volunteers wa...

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Published in:Journal of magnetic resonance imaging 2007-10, Vol.26 (4), p.921-926
Main Authors: Gharib, Ahmed M., Herzka, Daniel A., Ustun, Ali O., Desai, Milind Y., Locklin, Julia, Pettigrew, Roderic I., Stuber, Matthias
Format: Article
Language:English
Subjects:
Adult
Coronary Angiography - methods
Coronary Disease - diagnosis
Coronary Disease - pathology
coronary MRA
Diastole
Humans
Image Processing, Computer-Assisted
Magnetic Resonance Angiography - methods
Male
Middle Aged
parallel imaging
Regression Analysis
Reproducibility of Results
Respiration
RR variability
Systole
systolic imaging
Tachycardia - diagnosis
Tachycardia - pathology
Time Factors
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Summary:Purpose To investigate the impact of end‐systolic imaging on quality of right coronary magnetic resonance angiography (MRA) in comparison to diastolic and to study the effect of RR interval variability on image quality. Materials and Methods The right coronary artery (RCA) of 10 normal volunteers was imaged at 3T using parallel imaging (sensitivity encoding [SENSE]). Navigator‐gated three‐dimensional (3D) gradient echo was used three times: 1) end‐systolic short acquisition (SS): 35‐msec window; 2) diastolic short (DS): middiastolic acquisition using 35‐msec window; and 3) diastolic long (DL): 75‐msec diastolic acquisition window. Vectorcardiogram (VCG) data was used to analyze RR variability. Vessel sharpness, length, and diameter were compared to each other and correlated with RR variability. Blinded qualitative image scores of the images were compared. Results Quantitative and qualitative parameters were not significantly different and showed no significant correlation with RR variability. Conclusion Imaging the RCA at 3T during the end‐systolic rest period using SENSE is possible without significant detrimental effect on image quality. Breaking away from the standard of imaging only during diastole can potentially improve image quality in tachycardic patients or used for simultaneous imaging during both periods in a single scan. J. Magn. Reson. Imaging 2007;26:921–926. © 2007 Wiley‐Liss, Inc.
ISSN:1053-1807
1522-2586
DOI:10.1002/jmri.21056