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Dynamic Magnetic Resonance Imaging: new tools for speech research

Dynamic Magnetic Resonance Imaging: new tools for speech research
Dynamic Magnetic Resonance Imaging: new tools for speech research
A multiplanar Dynamic Magnetic Resonance Imaging (MRI) technique that extends our earlier work on single-plane Dynamic MRI is described. Scanned images acquired while an utterasne is repeated are recombined to form pseudo-time-varying images of the vocal tract using a simultaneously recorded audio signal. There is no technical limit on the utterance length or number of slices that can be so imaged, though the number of repetitions required may be limited by the subject's stamina. An example of [pasi] imaged in three sagittal planes is shown; with a Signa GE 0.5T MR scanner, 360 tokens were reconstructed to form a sequence of 39 3-slice 16ms frames. From these, a 3-D volume was generated for each time frame, and tract surfaces outlined manually. Parameters derived from these include: palate-tongue distances for [a,s,i]; estimates of tongue volume and of the area function using only the midsagittal, and then all three slices. These demonstrate the accuracy and usefulness of the technique.
623-6
Shadle, C.H.
dc56253d-9926-466f-a27c-b9a8252a5304
Mohammad, M.
5ab66550-a216-4da4-97f6-ac037d9be240
Carter, J.N.
e05be2f9-991d-4476-bb50-ae91606389da
Jackson, P.J.B.
81dc3458-f913-44b4-9829-ecb626df5278
Shadle, C.H.
dc56253d-9926-466f-a27c-b9a8252a5304
Mohammad, M.
5ab66550-a216-4da4-97f6-ac037d9be240
Carter, J.N.
e05be2f9-991d-4476-bb50-ae91606389da
Jackson, P.J.B.
81dc3458-f913-44b4-9829-ecb626df5278

Shadle, C.H., Mohammad, M., Carter, J.N. and Jackson, P.J.B. (1999) Dynamic Magnetic Resonance Imaging: new tools for speech research. 14th Int. Cong. Phon. Sci.. pp. 623-6 .

Record type: Conference or Workshop Item (Other)

Abstract

A multiplanar Dynamic Magnetic Resonance Imaging (MRI) technique that extends our earlier work on single-plane Dynamic MRI is described. Scanned images acquired while an utterasne is repeated are recombined to form pseudo-time-varying images of the vocal tract using a simultaneously recorded audio signal. There is no technical limit on the utterance length or number of slices that can be so imaged, though the number of repetitions required may be limited by the subject's stamina. An example of [pasi] imaged in three sagittal planes is shown; with a Signa GE 0.5T MR scanner, 360 tokens were reconstructed to form a sequence of 39 3-slice 16ms frames. From these, a 3-D volume was generated for each time frame, and tract surfaces outlined manually. Parameters derived from these include: palate-tongue distances for [a,s,i]; estimates of tongue volume and of the area function using only the midsagittal, and then all three slices. These demonstrate the accuracy and usefulness of the technique.

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More information

Published date: August 1999
Additional Information: Address: San Francisco, CA, USA
Venue - Dates: 14th Int. Cong. Phon. Sci., 1999-07-31
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 250434
URI: http://eprints.soton.ac.uk/id/eprint/250434
PURE UUID: b4f45d06-58dd-4ebd-afd5-b279769e7981

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Date deposited: 20 Jul 2000
Last modified: 29 Jan 2020 14:58

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Contributors

Author: C.H. Shadle
Author: M. Mohammad
Author: J.N. Carter
Author: P.J.B. Jackson

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