3D dynamic MRI of the vocal tract during natural speech.

ABSTRACT:

Purpose

To develop and evaluate a technique for 3D dynamic MRI of the full vocal tract at high temporal resolution during natural speech.

Methods

We demonstrate 2.4 × 2.4 × 5.8 mm³ spatial resolution, 61-ms temporal resolution, and a 200 × 200 × 70 mm³ FOV. The proposed method uses 3D gradient-echo imaging with a custom upper-airway coil, a minimum-phase slab excitation, stack-of-spirals readout, pseudo golden-angle view order in k_x -k_y , linear Cartesian order along k_z , and spatiotemporal finite difference constrained reconstruction, with 13-fold acceleration. This technique is evaluated using in vivo vocal tract airway data from 2 healthy subjects acquired at 1.5T scanner, 1 with synchronized audio, with 2 tasks durin

SUBMITTER: Lim Y 

PROVIDER: S-EPMC6347527 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature