AJP - Heart and Circulatory Physiology, Vol 243, Issue 4 634-H639, Copyright © 1982 by American Physiological Society
A digital sonomicrometer for two-point length and velocity measurements
C. A. Goodman and F. S. Castellana
We have designed, fabricated, and tested an improved digital sonomicrometer
for two-point ultrasound measurements in the experimental cardiology
laboratory. The system design incorporates state-of-the-art analog and
digital circuitry and demonstrates 1) capability for either analog or
digital output; 2) a resolution of +/- 0.15 mm, readily adjustable to +/-
0.03 mm as required; 3) excellent stability; 4) low cost; and 5) ease of
operation by untrained personnel. The device was calibrated in vitro and
successfully evaluated by making measurements of contractile motion in the
myocardium of the open-chest dog.
