Ultrasound Ultrasonix
Ultrasonix is a manufacturer of research ultrasound systems. Their old RP system provided the possibility of recording several minutes of high frame rate (>120fps) image sequences and synchronising them very precisely using a frame synchronisation signal provided by the ultrasound machine.
Newer systems include the Sonix Touch and the Sonix Tablet. Newer software released with these models currently only allows a few seconds of image data to be recorded but there is a promise that future revisions will restore the functionality of the older RP model.
http://www.ultrasonix.com/research/clinical/linguistic

Sonix Tablet