Measurements Of Ventricular Distances By Using Ultrasonic Techniques

ptember 1987 Measurements of ventricular distances by using ultrasonic techniques by Baki Koyuncu (Physics Department, Kuwait University, Kuwait) A well known technique was used to determine the external dimensions of the heart on any one of its cross-sectional planes under clinical conditions. The circuit described here used sound radiation in liquid and biological media. Sound was transmitted and received by two PZT-4 transducers placed on opposite sides of the sample heart. The time taken by sound to travel through the medium at a known speed V, was measured electronically. The distance between two transducers was calculated from d = Vxt. Under clinical conditions, measurements of distances be- tween surface points of a heart are required. This information is coupled with pressure, blood flow, muscle contraction, etc and contributes towards the di- agnostic picture of the heart. Numerous techniques (1.3) with implanted radio-opaque markers have been used to assess global cardia...