Diffractive transducers for angle-independent velocity measurements

Usual Doppler (or equivalent) methods produce a value proportional to the product of flow velocity and the cosine of the angle between the flow and insonating beam. By using a diffractive transducer, multiple insonating beams can be obtained from one transducer, permitting multiple measurements, at...

Full description

Saved in:
Bibliographic Details
Main Authors: Vilkomerson, D., Lyons, D., Chilipka, T.
Format: Conference Proceeding
Language:English
Subjects:
Acoustic diffraction
Biomedical acoustic imaging
Biomedical transducers
Blood flow measurement
Piezoelectric transducers
Citations: Items that cite this one
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Usual Doppler (or equivalent) methods produce a value proportional to the product of flow velocity and the cosine of the angle between the flow and insonating beam. By using a diffractive transducer, multiple insonating beams can be obtained from one transducer, permitting multiple measurements, at known increments of angle, to be made. In effect, the conventional single equation in the two unknowns of velocity and angle, is, by using a diffractive transducer, replaced by two (or more) equations in the two unknowns, that can be solved for the velocity and angle. The theory and experimental verification of operation of diffractive transducers is presented. Diffractive transducers may enable simple and inexpensive hemodynamic monitoring
DOI:10.1109/ULTSYM.1994.401913