04242912 is referenced by 37 patents and cites 9 patents.

A method for producing cross-sectional images using an ultrasonic imaging unit operating on the pulse-echo principle, which unit includes a transducer system having a stationary elongated array of adjacent transducer elements with transverse electrode segments adjacent one another on one side of the array. Successively and cyclically selected groups of adjacent elements are energized to produce an ultrasonic beam as a result of pulsed signals being applied to the corresponding electrode segments. Focussing of the ultrasonic beam produced by each group of the transducers is effected by having the transmitter signals applied to the electrode segments or subgroups thereof, and/or the echo-signals derived by the electrode segments from the reflected energy, time shifted relative to one another, in which each transmitter or echo-signal has a time shift associated thereto which is a function of the distance between the corresponding electrode segments (or subgroups of segments) and the center of the group of transducers.

Title
Method and apparatus for producing cross-sectional images using ultrasound
Application Number
746373
Publication Number
4242912
Application Date
February 9, 1979
Publication Date
January 6, 1981
Inventor
Rainer Fehr
Reinach
CH
Heinz Hoffmann
Grenzach
DE
Pierre Andre Grandchamp
Munchenstein
CH
Christoph B Burckhardt
Muttenz
CH
Agent
Mark L Hopkins
Bernard S Leon
Jon S Saxe
Assignee
Hoffmann La Roche
NJ, US
IPC
G01N 29/04
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