Noninvasive measurement of local arterial pulse wave velocity in humans by ultrasound.

An improved method for noninvasive measurement of the local velocity of arterial pulse wave propagation by an echo-tracking-based ultrasound system is described. A data acquisition image interface was programmed in the ultrasound machine simultaneously to record M-mode ultrasound signals at two locations of a given distance apart along an artery. The selections of measurement sites, separation, and time resolution were performed on the control interface.

Ultrasound imaging of the intervertebral disc.

Study Design: In vitro ultrasound imaging of dog intervertebral discs was performed.

Objective: To determine the reliability of ultrasound imaging in the detection of structural changes associated with disc pathology.

Summary Of Background Data: Little work has been done to evaluate the potential applications of ultrasound in the imaging of intervertebral discs.