A sonographic technique to reduce beam distortion by curved interfaces.
Ultrasonic beams are distorted during propagation between two media with different velocities if the traversed interface is curved within the ultrasonic beamwidth. The distorting effects of various interfaces on a beam generated by a multi-element transducer are analyzed and a technique to reduce these by controlling the time delays to the individual elements is presented.
Kossoff
G
G
Ultrasonics Institute, Sydney, Australia.
Carpenter
D A
DA
Robinson
D E
DE
Ostry
D
D
Ho
P L
PL
D004867:Equipment Design; D007089:Image Enhancement / Q000379:methods*; D008433:Mathematics; D014159:Transducers; D014463:Ultrasonography / Q000295:instrumentation / Q000379:methods*