Ultrasonic imaging apparatus

Details Ultrasonic imaging apparatus Ultrasonic imaging apparatus

1992-11-12

1993-11-16

Noland, Tom

Measuring and testing

Vibration

By mechanical waves

12866001, G01N 2924

Patent

active

052612813

ABSTRACT:
A phase adjustment circuit for use in an ultrasonic apparatus which respectively time-adjusts a plurality of received signals from an ultrasonic transducer array and sets wave fronts of the reflected waves from particular positions into an in-phase state and adds the in-phase signals, thereby obtaining a received beam. The received signals are mixed with phase-controlled reference signals. The low frequency component of the mixed wave is sequentially sampled and stored in a memory which is controlled by a clock signal of a predetermined period, and thereafter, the stored sampled signals are read out. Most of the necessary time adjustment results from the difference between the writing time and the reading time. The remaining micro time adjustment is performed by phase control of the reference signals.

REFERENCES:
patent: 3815409 (1974-06-01), Macouski
patent: 4019169 (1977-04-01), Takamizawa
patent: 4140022 (1979-02-01), Maalak
patent: 4325257 (1982-04-01), Kino et al.
patent: 4330875 (1982-05-01), Tachita et al.
patent: 4542746 (1985-09-01), Takamizawa
patent: 4959998 (1990-10-01), Yano
patent: 4974211 (1990-11-01), Corl

Affiliated with

Also associated with

Rating

Ultrasonic imaging apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ultrasonic imaging apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrasonic imaging apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-15407