Toward Dynamic Magnetic Resonance Imaging of the Vocal Tract During Speech Production

Ventura, Sandra; Freitas, Diamantino; Tavares, João Manuel R. S.

doi:10.1016/j.jvoice.2010.01.014

Cited by 20 publications

(33 citation statements)

References 20 publications

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“…An increasing number of research studies have used MRI to image the soft palate [10][11][12][13] and upper vocal tract [14][15][16][17]. In contrast to X-ray videofluoroscopy and nasendoscopy, MRI provides tomographic images in any plane with flexible tissue contrast.…”

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confidence: 99%

“…As a result, MRI has been used to obtain images of the musculature of the palate at rest and during sustained phonation [10,18,19]. It has also been used to image the whole vocal tract at rest or during sustained phonation [20][21][22][23][24][25][26][27] and with a single mid-sagittal image dynamically during speech [13,[15][16][17][28][29][30][31][32][33][34][35].…”

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confidence: 99%

“…Dynamic MRI of the vocal tract has been performed using both segmented [17,33,37] and real-time acquisitions [13,15,16,28,31,38]. Segmented acquisitions [39] acquire only a fraction of the k-space data required for each image during one repetition of the test phrase and, hence, require multiple identical repetitions.…”

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confidence: 99%

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Towards clinical assessment of velopharyngeal closure using MRI: evaluation of real-time MRI sequences at 1.5 and 3 T

Scott

Boubertakh²,

Birch³

et al. 2012

The British Journal of Radiology

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Objective: The objective of this study was to demonstrate soft palate MRI at 1.5 and 3 T with high temporal resolution on clinical scanners. Methods: Six volunteers were imaged while speaking, using both four real-time steady-state free-precession (SSFP) sequences at 3 T and four balanced SSFP (bSSFP) at 1.5 T. Temporal resolution was 9-20 frames s 21 (fps), spatial resolution 1.661.6610.0-2.762.7610.0 mm 3 . Simultaneous audio was recorded. Signal-to-noise ratio (SNR), palate thickness and image quality score (1-4, non-diagnostic-excellent) were evaluated. Results: SNR was higher at 3 T than 1.5 T in the relaxed palate (nasal breathing position) and reduced in the elevated palate at 3 T, but not 1.5 T. Image quality was not significantly different between field strengths or sequences (p5NS). At 3 T, 40% acquisitions scored 2 and 56% scored 3. Most 1.5 T acquisitions scored 1 (19%) or 4 (46%). Image quality was more dependent on subject or field than sequence. SNR in static images was highest with 1.961.9610.0 mm 3 resolution (10 fps) and measured palate thickness was similar (p5NS)

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Towards clinical assessment of velopharyngeal closure using MRI: evaluation of real-time MRI sequences at 1.5 and 3 T

Scott

Boubertakh²,

Birch³

et al. 2012

The British Journal of Radiology

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“…Currently, the use of MRI in speech research provides useful and accurate qualitative and quantitative data of speech articulation [21,22,23,24].…”

Section: Measuring and Modelling Speech: A Reviewmentioning

confidence: 99%

3D Vocal Tract Reconstruction Using Magnetic Resonance Imaging Data to Study Fricative Consonant Production

Ventura

Freitas

Ramos

et al. 2015

Lecture Notes in Computational Vision and Biomechanics

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The development of Magnetic Resonance Imaging (MRI) has grown rapidly in clinical practice. Currently, the use of MRI in speech research provides useful and accurate qualitative and quantitative data of speech articulation. The aim of this work was to describe an effective method to extract vocal tract and compute their volumes during speech production from MRI images. Using a 3.0 Tesla MRI system, 2D and 3D images of the vocal tract were collected and used to analyze the vocal tract during the production of fricative consonants. These images were also used to build the associated 3D models and compute their volumes. This approach showed that, in general, the volumes measured for the voiceless consonants are smaller than the counterpart voiced consonants.

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“…The role of teeth during speech is important not only to the evaluation of dental and lingual sounds, but also for measuring the vocal tract shape in three dimensions (3D) and the mouth acoustic opening [6]. The vocal tract is similar to an inverted L-shaped tube, with a significant length, which extends from the vocal folds to the lips and with a side branch leading to the nasal cavity [7] and nostrils. The articulators include the lips, the tongue, the teeth, the palate and the pharynx, and establish a set of cavities for air stream modification during speech.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional visualization of teeth by magnetic resonance imaging during speech

Ventura

Freitas

Ramos³

et al. 2013

Biodental Engineering II

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Toward Dynamic Magnetic Resonance Imaging of the Vocal Tract During Speech Production

Cited by 20 publications

References 20 publications

Towards clinical assessment of velopharyngeal closure using MRI: evaluation of real-time MRI sequences at 1.5 and 3 T

Towards clinical assessment of velopharyngeal closure using MRI: evaluation of real-time MRI sequences at 1.5 and 3 T

3D Vocal Tract Reconstruction Using Magnetic Resonance Imaging Data to Study Fricative Consonant Production

Three-dimensional visualization of teeth by magnetic resonance imaging during speech

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