Apparatus for controlling the sensitivity of transducer elements

Details Apparatus for controlling the sensitivity of transducer elements Apparatus for controlling the sensitivity of transducer elements

1997-06-23

1999-03-30

Noland, Thomas P.

Measuring and testing

Instrument proving or calibrating

Apparatus for measuring by use of vibration or apparatus for...

G01N 2922, G01D 1800, G01R 3500

Patent

active

058891943

ABSTRACT:
Apparatus and methods for controlling electrostrictive transducer sensitivity in a pulse-echo medical ultrasound system. Certain characteristics of each transducer element are tested after manufacture and recorded on a storage medium. The stored data is then used, along with certain model relations, for monitoring certain operational parameters of the transducer during use, and feedback compensation applied for maintaining the transducer sensitivity substantially constant. The parameters to be monitored may include the temperature, acoustic pressure, input power, and a figure of merit determined from the dielectric constant and coupling coefficient.

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