A comparison of prospective and retrospective respiratory navigator gating in 3D MR coronary angiography |
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| Authors: | Du Y P McVeigh E R Bluemke D A Silber H A Foo T K |
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| Affiliation: | (1) Applied Science Lab, GE-Medical Systems, Milwaukee, Wisconsin, USA;(2) Department of Biomedical Engineering and Radiology, Johns Hopkins University School of Medicine, Baltimore, USA;(3) Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA |
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| Abstract: | A comparison between the prospective and retrospective respiratory navigator gating in MR coronary angiography was performed with eight normal subjects. A three-dimensional (3D) ECG-gated fast gradient echo pulse sequence was used for image data acquisition. The results show that the MR coronary angiography obtained using retrospective gating retains a considerable amount of motion artifacts. In this study, the images acquired using prospective navigator gating demonstrated significantly reduced motion artifacts (p = 0.009), improved vessel visibility (p = 0.021) with reduced imaging time (p = 0.013) compared to the images obtained using retrospective navigator gating. |
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| Keywords: | coronary imaging MR imaging MR navigator echoes |
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