Can a sub 2-minute MRI exam compete with CT for imaging sinus anatomy?
Sarah Reeve1,2, Mark Parker2,3, James Rioux1,2,4, Elena Adela Cora4,5, Chris Bowen1,2,4, Steven Beyea1,2,4,6, and David Volders4,5
1Physics and Atmospheric Science, Dalhousie University, Halifax, NS, Canada, 2Biomedical Translational Imaging Centre, QEII Health Sciences Centre, Halifax, NS, Canada, 3Medicine, Dalhousie University, Halifax, NS, Canada, 4Diagnostic Radiology, Dalhousie University, Halifax, NS, Canada, 5Diagnostic Imaging, Nova Scotia Health, Halifax, NS, Canada, 6School of Biomedical Engineering, Dalhousie University, Halifax, NS, Canada
MRI of the paranasal sinuses with bSSFP sequences is not typically performed due to prohibitive exam times and the prevalence of artifacts caused by off-resonance effects. We have shown that bSSFP images acquired in under 2 minutes using high-performance gradients at low field resist banding artifacts and demonstrate SNR and resolution sufficient to delineate relevant structures. This is supported by high SNR values in tissues and fluid-filled spaces, and low SNR in the air-filled maxillary sinus. 2-minute scan times compete with CT for clinical work flow and demonstrate the potential of MRI for high throughput sinus pathology evaluation.
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