Drive limiter in ultrasound probe-driving transmitter

Details Drive limiter in ultrasound probe-driving transmitter Drive limiter in ultrasound probe-driving transmitter

1993-09-28

1996-03-12

Manuel, George

Surgery

Truss

Pad

A61B 800

Patent

active

054977754

ABSTRACT:
A transmitter circuit assembly in an ultrasonic diagnostic system intermittently transmitting ultrasonic energy in bursts beamed through a probe into an organism according to control parameters defined by organic diagnostic requirements input into the circuit assembly. The transmitter circuit assembly includes a probe drive-signal output circuit driving the probe-to emit ultrasonic energy; a drive voltage determining circuit determining drive signal voltage, and a circuit computing a drive voltage-limit reference voltage, both voltages being determined according to the control parameters defined by the organic diagnostic requirements; and a drive signal transmission prohibition circuit comparing the drive voltage with the reference voltage and prohibiting the drive signal from being output when the drive voltage is higher than the reference voltage. Thus if an abnormally high-voltage drive voltage is generated or in an instance In which the transmission interval is abnormally short due to hardware failure, or furthermore if abnormal control parameter values due software malfunction, or other abnormality in the transmitter circuit assembly is accordingly detected, the reference voltage is decreased; transmission of ultrasonic energy is thus prohibited, such that acoustic impact of the ultrasonic energy beamed into a patient does not exceed a limit value industry-designated for patient diagnostic safety.

REFERENCES:
patent: 5233994 (1993-08-01), Shmulewitz

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