Abstract

Purpose
To demonstrate a tagging method compatible with RT‐MRI for the study of speech production.
Methods
Tagging is applied as a brief interruption to a continuous real‐time spiral acquisition. Tagging can be initiated manually by the operator, cued to the speech stimulus, or be automatically applied with a fixed frequency. We use a standard 2D 1‐3‐3‐1 binomial SPAtial Modulation of Magnetization (SPAMM) sequence with 1 cm spacing in both in‐plane directions. Tag persistence in tongue muscle is simulated and validated in vivo. The ability to capture internal tongue deformations is tested during speech production of American English diphthongs in native speakers.
Results
We achieved an imaging window of 650‐800 ms at 1.5T, with imaging signal to noise ratio ≥ 17 and tag contrast to noise ratio ≥ 5 in human tongue, providing 36 frames/s temporal resolution and 2 mm in‐plane spatial resolution …

Date

2019

Authors

Weiyi Chen, Dani Byrd, Shrikanth Narayanan, Krishna S Nayak

Journal

Magnetic resonance in medicine

Volume

82

Issue

2

Pages

600-613