Adaptive temporal filter for ultrasound imaging system

Details Adaptive temporal filter for ultrasound imaging system Adaptive temporal filter for ultrasound imaging system

1987-11-04

1989-12-12

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

358166, 36472417, 36472419, G06K 944

Patent

active

048873063

ABSTRACT:
An improved temporal compounding technique for a medical ultrasound imaging system. The imaging system produces a plurality of pixel signals, such that each pixel signal comprises a time series of pixel values X(k), each pixel value being a function of the magnitude of the echo received from a particular sample volume. Each pixel signal is filtered to produce a filtered signal comprising a time series of filtered values Y(k). For each pixel signal, the characteristic of the filter varies as the magnitude of the pixel signal varies. In one embodiment, each filtered value Y(k) is equal to A.multidot.X(k)+(1-A).multidot.Y(k-1), with A being a monotonically increasing function of X(k). Embodiments are also disclosed in which the filter characteristic is a function of the absolute value of the difference between X(k) and Y(k-1).

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patent: 4038536 (1977-07-01), Feintuch
patent: 4305133 (1981-12-01), Amada et al.
patent: 4408228 (1983-10-01), Mahony
patent: 4694342 (1987-09-01), Klees
patent: 4761819 (1988-08-01), Denison et al.
patent: 4771470 (1988-09-01), Geiser et al.

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