Ultrasound prode with banks of interconnected electrostrictive t

Details Ultrasound prode with banks of interconnected electrostrictive t Ultrasound prode with banks of interconnected electrostrictive t

1994-08-17

1995-08-22

Manuel, George

Surgery

Truss

Pad

73626, A61B 800

Patent

active

054430704

ABSTRACT:
A probe in an ultrasound imaging system uses electrostrictive transducer elements that exhibit little or no piezoelectric properties when in an unbiased state, but do exhibit them when a bias is applied. A linear array of a large number of electrostrictive transducer elements in a probe are provided with an aperture that is shifted across the probe by biasing on and off banks of interconnected electrostrictive transducer elements. The progression of transducer elements from one end of the probe to the other is divided or grouped into adjacent banks of consecutive transducer elements. Each bank has the same number (n) of transducer elements. Each of the n-many transducer elements within a bank has a bias terminal, a signal return or ground terminal and a driven terminal. All the ground terminals are common and connected to a signal return, or ground. The driven terminal of each transducer element in a bank is connected in parallel with the corresponding transducer element in every other bank. Within each bank all bias terminals are connected in parallel, but each bank has a separate bias. At any given time only one bank is biased on. Thus, each of the transducer elements within the banks is excited in a cyclic fashion while advancing the selected bank once every cycle.

REFERENCES:
patent: 4141347 (1979-02-01), Green et al.
patent: 4633308 (1986-12-01), Dukes et al.
patent: 5031626 (1991-07-01), Hassler et al.

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