Ultrasonic echogram probe and sector echographic scanning device

Details Ultrasonic echogram probe and sector echographic scanning device Ultrasonic echogram probe and sector echographic scanning device

1982-07-07

1985-05-14

Howell, Kyle L.

Surgery

Truss

Pad

73626, A61B 1000

Patent

active

045165831

ABSTRACT:
The device, particularly useful for B echographic examination of an organ or of an internal anatomical structure, comprises a line array of N identical transducer elements (12.sub.i, . . . , 12.sub.N) distributed at equal intervals and operating at a predetermined frequency f, means for storing at least one distribution of delays of n successive transducers (n being less than N) corresponding to focussing at a predetermined distance from the line for frequency f, switch means enabling a group of n transducers to be connected temporarily to signal emitting or receiving means with delays corresponding to the distribution and the group of n transducers to be shifted so as to effect scanning. The transducers are arranged along a circular line with the convex side turned toward said medium so as to cause sector scanning around the axis of the circular line on operation of switch commutator means and the time delays are arranged to ensure focussing along the radius corresponding to the middle transducer of the group.

REFERENCES:
patent: 4208916 (1980-06-01), Thomenius et al.
patent: 4253338 (1981-03-01), Iinuma et al.
patent: 4319489 (1982-03-01), Yamaguchi et al.
patent: 4344327 (1982-08-01), Yoshikawa et al.
patent: 4372323 (1983-02-01), Takemura et al.
patent: 4409982 (1983-10-01), Plesset et al.

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