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Coronary MR angiography at 3T during diastole and systole
Author(s) -
Gharib Ahmed M.,
Herzka Daniel A.,
Ustun Ali O.,
Desai Milind Y.,
Locklin Julia,
Pettigrew Roderic I.,
Stuber Matthias
Publication year - 2007
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.21056
Subject(s) - diastole , medicine , image quality , magnetic resonance imaging , systole , cardiac cycle , cardiology , nuclear medicine , radiology , blood pressure , image (mathematics) , artificial intelligence , computer science
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.