EP 0069677 B2 19951213 - Device for ultrasonic echography to scan sectorially
Title (en)
Device for ultrasonic echography to scan sectorially
Title (de)
Vorrichtung für Ultraschall-Echographie zur Sektorabtastung
Title (fr)
Dispositif d'échographie ultrasonore à balayage sectoriel
Publication
Application
Priority
FR 8113445 A 19810708
Abstract (en)
[origin: US4516583A] 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 (12i, . . . , 12N) 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.
IPC 1-7
IPC 8 full level
G10K 11/34 (2006.01)
CPC (source: EP US)
G10K 11/345 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB NL
DOCDB simple family (publication)
EP 0069677 A1 19830112; EP 0069677 B1 19860910; EP 0069677 B2 19951213; DE 3273181 D1 19861016; FR 2509486 A1 19830114; FR 2509486 B1 19850524; US 4516583 A 19850514
DOCDB simple family (application)
EP 82401291 A 19820708; DE 3273181 T 19820708; FR 8113445 A 19810708; US 39607882 A 19820707