Acquiring and visualizing 3D/4D ultrasound recordings of tongue motion
| Autor: | Steven M. Lulich, Kenneth de Jong, Kelly Berkson |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Linguistics and Language
Computer science business.industry Frame (networking) Ultrasound Phonetics Frame rate Scan line Language and Linguistics 030218 nuclear medicine & medical imaging Visualization 030507 speech-language pathology & audiology 03 medical and health sciences Speech and Hearing 0302 clinical medicine Data access Computer vision Artificial intelligence 0305 other medical science business Image resolution |
| Zdroj: | Journal of Phonetics. 71:410-424 |
| ISSN: | 0095-4470 |
| Popis: | Ultrasound is increasingly common in speech and phonetics research as technology continues to improve. The first digital 3D/4D ultrasound system was utilized for speech research nearly a decade ago, but data access, processing, and visualization were limited to (non-speech) clinical imaging applications. Access to the raw (pulse-echo or scan-converted) image data is a critical step toward making 3D/4D ultrasound an effective tool for speech research. In addition, there is a need for technical characterization of 3D/4D ultrasound systems together with a presentation of their strengths and limitations for research. This paper gives a general technical description of ultrasound systems, beginning with conventional 2D image acquisition and working up toward 3D/4D systems. Emphasis is given to one particular system – the Philips EPIQ 7G system with xMatrix X6-1 digital 3D/4D transducer – for which access to raw scan-converted data is now possible. For parameter settings typical of general abdominal imaging, frame rates around 20 fps are easily achieved (with frame rates possible up to 173 fps depending on image volume size, scan line density, and imaging depth), with spatial resolution comparable to research-grade 2D transducers. Using a modified Philips foot pedal, ultrasound recordings can be made with synchronous audio, and time-aligned with a minimum uncertainty equal to the ultrasound frame duration. In speech research, frame rates around 20 fps – with corresponding time-alignment uncertainty near 50 ms – provide good 3D coverage and enable many new phonetics questions to be posed and addressed. |
| Databáze: | OpenAIRE |
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