Method and apparatus for acoustic subtraction imaging using line

Details Method and apparatus for acoustic subtraction imaging using line Method and apparatus for acoustic subtraction imaging using line

1998-12-30

2000-01-04

Getzow, Scott M.

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

A61B 800

Patent

active

060104562

ABSTRACT:
A method and an apparatus for imaging a nonlinear signal component isolated from the echo signal derived from transmission of a base waveform having fundamental frequency f.sub.0 and relatively high peak power. The nonlinear signal component is isolated by subtracting the linear signal component from the echo signal. This is accomplished using a second transmit firing derived from the same base waveform, but having different transmit characteristics, i.e., the base waveform is convolved with a code sequence to form a coded waveform. The coded waveform is transmitted at relatively low peak power. The beamsummed signal produced from the low-peak-power coded transmit is pulse compressed and then subtracted from the beamsummed signal produced from the high-peak-power uncoded transmit. The signals are scaled as necessary to achieve cancellation of the linear signal components when one beamsummed signal is subtracted from the other, leaving the nonlinear signal component for imaging.

REFERENCES:
patent: 4771786 (1988-09-01), Iinuma
patent: 5485842 (1996-01-01), Quistgaard
patent: 5544659 (1996-08-01), Banjanin
patent: 5577505 (1996-11-01), Brock-Fisher
patent: 5632277 (1997-05-01), Chapman et al.
patent: 5706819 (1998-01-01), Hwang et al.
patent: 5840032 (1998-11-01), Hatfield et al.
Fatemi et al., "Assessment of Tissue Nonlinearity Using `Nonlinear Shadowing` Effect," IEEE Ultrason. Symp. 1995, pp. 1219-1223.

Affiliated with

Also associated with

Rating

Method and apparatus for acoustic subtraction imaging using line does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1068564