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Abstract #0655

Real-time speech MRI: a comparison of Cartesian and non-Cartesian sequences

Andreia C. Freitas 1,2 , Marzena Wylezinska 1,2 , Malcolm J Birch 2 , Steffen E. Petersen 1 , and Marc E. Miquel 1,2

1 William Harvey Research Institute, Queen Mary University of London, London, United Kingdom, 2 Clinical Physics, Barts Health NHS Trust, London, United Kingdom

Real-time MRI is a promising tool to dynamically image the vocal tract during speech. However, obtaining the required temporal resolution while maintaining image quality is still a major challenge. While Cartesian sequences are widely available and easy to implement, non-Cartesian sequences have been suggested to improve spatial-temporal resolution. This study provides a comparison of non-Cartesian (radial and spiral) and Cartesian real-time sequences in velopharyngeal closure assessment. At higher frame rates, spiral acquisition provided a 25%-60% superior SNR than radial and Cartesian sequences. Spiral sequences also showed superior image quality scoring (32% classified Excellent) and improved temporal fidelity at higher frame rates.

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