Method of determining operating characteristics of ultrasonic sc

Details Method of determining operating characteristics of ultrasonic sc Method of determining operating characteristics of ultrasonic sc

1982-07-16

1984-08-07

Ciarlante, Anthony V.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

G01N 2900

Patent

active

044635923

ABSTRACT:
The characteristics of an ultrasonic scanning system, including band-width, center frequency, and spectrum shape of reflected signals, are determined by directing ultrasonic energy from the system into a phantom having known ultrasonic attenuation and detecting the reflected ultrasonic signal for various depths in the phantom. Band-width is measured from the slope of frequency versus phantom depth. Center frequency is determined from the frequency of the signal reflected from the surface of the phantom. Spectrum shape is determined from the change in frequency of the reflected signal with change in phantom depth.

REFERENCES:
patent: 3309914 (1967-03-01), Weighart
patent: 4016750 (1977-04-01), Green
patent: 4286455 (1981-09-01), Ophir et al.
patent: 4361043 (1982-11-01), Engle
"Statistical Evaluation of the Doppler Ultrasonic Blood Flowmeter", Flax et al., ISA Transactions, vol. 10, #1, 1971.

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