A fast and flexible MRI system for the study of dynamic vocal tract shaping

Sajan Goud Lingala; Yinghua Zhu; Yoon-Chul Kim; Asterios Toutios; Shrikanth Narayanan; Krishna S Nayak

doi:10.1002/mrm.26090

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A fast and flexible MRI system for the study of dynamic vocal tract shaping

Journal article

Peer reviewed

A fast and flexible MRI system for the study of dynamic vocal tract shaping

Sajan Goud Lingala, Yinghua Zhu, Yoon-Chul Kim, Asterios Toutios, Shrikanth Narayanan and Krishna S Nayak

Magnetic resonance in medicine, Vol.77(1), pp.112-125

01/2017

DOI: 10.1002/mrm.26090

PMCID: PMC4947574

PMID: 26778178

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Abstract

The aim of this work was to develop and evaluate an MRI-based system for study of dynamic vocal tract shaping during speech production, which provides high spatial and temporal resolution. The proposed system utilizes (a) custom eight-channel upper airway coils that have high sensitivity to upper airway regions of interest, (b) two-dimensional golden angle spiral gradient echo acquisition, (c) on-the-fly view-sharing reconstruction, and (d) off-line temporal finite difference constrained reconstruction. The system also provides simultaneous noise-cancelled and temporally aligned audio. The system is evaluated in 3 healthy volunteers, and 1 tongue cancer patient, with a broad range of speech tasks. We report spatiotemporal resolutions of 2.4 × 2.4 mm every 12 ms for single-slice imaging, and 2.4 × 2.4 mm every 36 ms for three-slice imaging, which reflects roughly 7-fold acceleration over Nyquist sampling. This system demonstrates improved temporal fidelity in capturing rapid vocal tract shaping for tasks, such as producing consonant clusters in speech, and beat-boxing sounds. Novel acoustic-articulatory analysis was also demonstrated. A synergistic combination of custom coils, spiral acquisitions, and constrained reconstruction enables visualization of rapid speech with high spatiotemporal resolution in multiple planes. Magn Reson Med 77:112-125, 2017. © 2016 Wiley Periodicals, Inc.

Adult

Algorithms

Female

Humans

Image Processing, Computer-Assisted - methods

Magnetic Resonance Imaging - methods

Male

Signal Processing, Computer-Assisted

Signal-To-Noise Ratio

Sound Spectrography - methods

Speech - physiology

Tongue Neoplasms - diagnostic imaging

Vocal Cords - diagnostic imaging

Details

Title: Subtitle: A fast and flexible MRI system for the study of dynamic vocal tract shaping
Creators: Sajan Goud Lingala - University of Southern California
Yinghua Zhu - University of Southern California
Yoon-Chul Kim - Samsung Medical Center
Asterios Toutios - University of Southern California
Shrikanth Narayanan - University of Southern California
Krishna S Nayak - University of Southern California
Resource Type: Journal article
Publication Details: Magnetic resonance in medicine, Vol.77(1), pp.112-125
DOI: 10.1002/mrm.26090
PMID: 26778178
PMCID: PMC4947574
NLM abbreviation: Magn Reson Med
ISSN: 0740-3194
eISSN: 1522-2594
Grant note: R01 DC007124 / NIDCD NIH HHS
Language: English
Date published: 01/2017
Academic Unit: Roy J. Carver Department of Biomedical Engineering; Radiology
Record Identifier: 9984196996302771

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