Ultrasound doppler wall filter

Details Ultrasound doppler wall filter Ultrasound doppler wall filter

1996-12-30

1998-10-20

Jaworski, Francis

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

A61B 806

Patent

active

058239642

ABSTRACT:
An improved digital wall filter comprises an infinite impulse response (IIR) second order digital filter. The coefficients w(-1) and w(-2) are pre-initialized from a set of m samples of the input signal. The number of samples m is related to the ratio of a constant .gamma., selected between 0 and 1, and the feedback filter coefficients. To ensure maximum performance of the filter, the filter is periodically re-initialized before filtering a new set of input data. To produce a video line, the filtered data created from the input samples used to initialize the filter are averaged with data that was not used to initialize the filter.

REFERENCES:
patent: 5327894 (1994-07-01), Thomas
patent: 5349524 (1994-09-01), Daft et al.
patent: 5349525 (1994-09-01), Dunki-Jacobs et al.
patent: 5419333 (1995-05-01), Hagiwara et al.
patent: 5467770 (1995-11-01), Smith et al.
Chornoboy, E.S., "Initialization For Improved IIR Filter Performance,"0 IEEE Transactions On Signal Processing, 40(3):543-550, Mar. 1992.

Affiliated with

Also associated with

Rating

Ultrasound doppler wall filter does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-239345