Research

Research

Research technologies
Ultrasound
Magnetic Resonance Imaging (MRI)
Electropalatography (EPG)

Various research areas
Modelling the tongue
Tongue Segmentation
Swallowing

Ultrasound

Ultra high-frequency sound waves are used to create movies of planar tongue motion. The 2D planar motion can be reconstructed into 3D surface motion.

Click to download a Guide to Analyzing Tongue Motion from Ultrasound Images.

Our applications of this technology include:

	Head and Transducer Support (HATS) System -More Information			Mid-sagittal Ultrasound image of the tongue (Image of 'I') -Ultrasound movies -Fun movies

	Edge detection of tongue contours using EdgeTrak			3D Reconstruction of the tongue surface from ultrasound. (Image of 'l') -More 3D surfaces -3D Movies

	Ultrasound image of the vocal folds while breathing			Visualizes and compares multiple contours using SURFACES.

Magnetic Resonance Imaging (MRI)
Vocal tract images are made in multiple planes during sustained speech sounds. Tagged Cine-MRI (tMRI) allows tracking of tissue points in oral structures.

Subject saying /r/

Subject saying /i/

MRI movies

Tagged Cine-MRI (tMRI) -Planar

Tagged Cine-MRI (tMRI) -MICSR

Electropalatography (EPG)

Acrylic palates, custom made to fit each subject's palate, record tongue-palate contact in real time.

Electropalatography image

EPG pictures and movies

The VTV Lab is part of the Dental School of the University of Maryland Baltimore.
Please send comments and suggestions regarding this site to Dr. Maureen Stone, Director of the Lab.