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Imaging the tongue and vocal tract
1National Institutes of Health, Department of Rehabilitation Medicine, Bethesda, MD 20892.
The British Journal of Disorders of Communication
|April 1, 1991
Summary
Imaging techniques like X-ray, CT, MRI, and ultrasound offer non-invasive ways to study vocal tract structures. These methods provide detailed shape and position data, overcoming limitations of direct measurement for speech research.
Area of Science:
- Speech science
- Biomedical imaging
- Anatomy
Background:
- Direct measurement of vocal tract internal structures is challenging due to movement interference.
- Imaging techniques offer indirect measurement of internal structures without physical contact.
Purpose of the Study:
- To examine four common imaging techniques used in vocal tract research: X-ray, computed tomography (CT), magnetic resonance imaging (MRI), and ultrasound.
- To discuss the advantages, limitations, and unique data provided by these imaging systems.
Main Methods:
- Review of X-ray, CT, MRI, and ultrasound imaging techniques.
- Analysis of their application in studying vocal tract and tongue movement.
Main Results:
- Imaging systems provide comprehensive shape and position data of entire structures, unlike point-tracking methods.
- Images can be acquired in multiple planes (midsagittal, coronal, transverse, etc.).
- Limitations include static imaging (CT, MRI), inability to image hard tissue (ultrasound), and radiation exposure (X-ray).
Conclusions:
- Imaging techniques are valuable tools for vocal tract research, offering unique insights into internal structures.
- Understanding the specific advantages and limitations of each technique is crucial for appropriate application.