Abstract
Introduction Steady-state free precession (SSFP) imaging at 3 T can be used to generate coronary artery images with substantially higher signal to noise ratio (SNR) and blood-myocardium contrast to noise ratio (CNR) compared to 1.5 T, but is limited by potentially severe off-resonance artifacts [1]. The need for a short TR (to avoid banding) limits the spatial resolution to > 1 mm using conventional gradients, making it difficult to achieve the sub-millimeter resolution needed for accurately evaluating coronary artery stenoses. Wideband SSFP uses two alternating repetition times to increase the band spacing in the steady-state frequency response, with a modest sacrifice in SNR [2]. It can suppress off-resonance related artifacts in cardiac imaging for a given spatial resolution. We demonstrate the application of wideband SSFP to 3D free-breathing coronary artery imaging at 3 T, and compare results with conventional SSFP at 3 T.
Highlights
Steady-state free precession (SSFP) imaging at 3 T can be used to generate coronary artery images with substantially higher signal to noise ratio (SNR) and blood-myocardium contrast to noise ratio (CNR) compared to 1.5 T, but is limited by potentially severe off-resonance artifacts [1]
We demonstrate the application of wideband SSFP to 3D free-breathing coronary artery imaging at 3 T, and compare results with conventional SSFP at 3 T
W Figeudreem2onstrate sub-millimeter resolution 3D SSFP coronary artery imaging at 3 Tesla using the wideband SSFP technique We demonstrate sub-millimeter resolution 3D SSFP coronary artery imaging at 3 Tesla using the wideband SSFP technique
Summary
Steady-state free precession (SSFP) imaging at 3 T can be used to generate coronary artery images with substantially higher signal to noise ratio (SNR) and blood-myocardium contrast to noise ratio (CNR) compared to 1.5 T, but is limited by potentially severe off-resonance artifacts [1]. 2117 High-resolution 3D free-breathing coronary MR angiography using wideband SSFP at 3 Tesla Hsu-Lei Lee*1, Ajit Shankaranarayanan2, Gerald M Pohost3 and Krishna S Nayak1 * Corresponding author from 11th Annual SCMR Scientific Sessions Los Angeles, CA, USA.
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