Abstract

Methods and Results:
Sequence design: There is no widely accepted standard for spatial and temporal resolution needed for speech imaging. In fact, it depends largely on the articulators of interest, the sounds being studied, and in part, the language. Based on our experiences of 2D real-time speech imaging, we determined 2.5 mm isotropic spatial resolution and 150 ms temporal resolution as our initial goal. For pulse sequence design, we adopted a stack-of-spirals sampling [5] in which target imaging FOV was 20 x20 cm2 in the in-plane and 5 cm in the slice direction. The parameters of five sequences are listed and compared in Table 1, along with the acceleration factors that are needed to achieve 150 ms temporal resolution. Data were reconstructed using 2D gridding within each kx-ky plane, followed by 3D inverse Fourier transformation. Experiments: Experiments were performed on a GE 1.5 T MRI scanner …

Date

2012

Authors

Yinghua Zhu, Yoon-Chul Kim, Michael Proctor, Shrikanth Narayanan, Krishna Nayak

Journal

Proc. ISMRM

Volume

294