Miniaturized mechanically-steerable ultrasonic probe

Details Miniaturized mechanically-steerable ultrasonic probe Miniaturized mechanically-steerable ultrasonic probe

1990-11-19

1993-03-23

Jaworski, Francis

Surgery

Truss

Pad

12866206, A61B 806

Patent

active

051955199

ABSTRACT:
A miniaturized ultrasonic probe includes a housing encasing a motor, an ultrasonic transducer mounted for controlled rotation on the motor shaft, and an angular position sensor connected to the shaft. The housing has a radiating dome about the transducer and is sealed and wholly filled with an acoustically-transparent fluid. The transducer may be specially configured for use in continuous wave Doppler measurements of blood flow velocities and, for this purpose, may include a first portion for continuously transmitting an ultrasound beam and a second portion for continuously receiving backscattered ultrasound reflections of the transmitted ultrasound beam. The position sensor is implemented using a low mass variable-inductor arrangement. The resulting probe attains unusually rapid accelerations and changes in beam direction with highly accurate control of transducer orientation in a notably and advantageously miniaturized construction.

REFERENCES:
patent: 4399703 (1983-08-01), Matzuk
patent: 4509526 (1985-04-01), Barnes et al.
patent: 4757818 (1988-07-01), Angelsen
patent: 4972839 (1990-11-01), Angelsen

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