Phased array acoustic imaging system

Details Phased array acoustic imaging system Phased array acoustic imaging system

G - Physics

01

S

349/36

G01S 15/89 (2006.01) G01S 7/52 (2006.01) G01S 7/62 (2006.01) G10K 11/34 (2006.01)

Patent

CA 1236210

PHASED ARRAY ACOUSTIC IMAGING SYSTEM ABSTRACT A phased array acoustic imaging system including an array of electromechanical transducers, a dedicated sig- nal processing channel for each transducer and elec- tronic control and delay circuits for them, transmits to and receives ultrasonic energy from a body in a con- trolled, steered and focused fashion. The electronic delay circuits use a unique cyclically symmetrical ar- rangement of identical delay cells, each with an elec- tronically variable delay element and each dedicated to a receive signal derived from at least one transducer, to form a summing delay line. The individual delay cells are switched under microprocessor control for efficient combined linear/sector scanning or linear or sector scanning alone. The system includes means to achieve dynamic focusing and dynamic apodization in conjunction with the delay cell architecture.

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