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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