Method and apparatus for adaptive B-mode image enhancement

Details Method and apparatus for adaptive B-mode image enhancement Method and apparatus for adaptive B-mode image enhancement

1997-11-07

1999-10-05

Lateef, Marvin M.

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

A61B 800

Patent

active

059614617

ABSTRACT:
A method and an apparatus for adaptively enhancing the B-mode image during post-detection image processing in an ultrasound imaging system. A low pass filter which smooths out speckle and a high pass filter which enhances edges are placed in parallel signal paths connected to the output of an envelope detector in a B-mode processor. The signals in the high pass filter path are logarithmically compressed before high pass filtering. The signals in the low pass filter path are logarithmically compressed after low pass filtering. Respective weighting factors are applied to the low- and high-pass-filtered signals by an adaptive weighting device, which may take the form of a processor or a look-up table. The weighted low- and high-pass-filtered signals are then summed and optionally input to an anti-aliasing low pass filter before decimation and scan conversion.

REFERENCES:
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patent: 5622174 (1997-04-01), Yamazaki
patent: 5718229 (1998-02-01), Pesque et al.
Gehlbach, "Speckle reduction processing," SPIE vol. 768 Int'l Symp. Pattern Recog. & Acoust. Imaging, pp. 178-180 (1987).
Kotropoulos et al., "Optimum nonlinear signal detection and estimation in the presence of ultrasonic speckle," Ultrasonic Imaging, vol. 14, pp. 249-275 (1992).
Rhyne et al., "An optimal measurement of integrated backscatter and cyclic variation of integrated backscatter," Ultrasonic Imaging, vol. 12, pp. 189-204 (1990).

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