Abstract

Methods Experiments were performed on a GE Signa Excite 1.5 T scanner with a custom 4-channel receiver coil (two anterior elements, two posterior elements) using custom real-time imaging software [5]. Imaging parameters were: FOV= 20× 20 cm2, flip angle= 15, slice thickness= 6 mm, spiral gradient echo sequence, 13-interleaf uniform density spiral trajectories, 2.4× 2.4 mm2 spatial resolution, TR= 6.004 ms, sequential view order. Slice-interleaf order followed the scheme shown in Fig. 1. Temporal resolution was 6.004* 26= 156.1 ms. Real-time video was obtained at a frame rate of 23.8 fps after a sliding window reconstruction.
Imaging data were acquired from two subjects: one native speaker of Mandarin Chinese and one native English speaker. Stimuli were presented in-scanner, using a mirror-projector setup, and uttered at a normal speech rate. Two slices of interest were prescribed and saved during real …

Date

2011

Authors

Yoon-Chul Kim, Michael I Proctor, Shrikanth S Narayanan, Krishna S Nayak

Journal

Proc. Intl. Soc. Mag. Reson. Med

Volume

19

Pages

2454