Process and installation for producing and recording ultrasonic

Details Process and installation for producing and recording ultrasonic Process and installation for producing and recording ultrasonic

1979-01-23

1981-06-30

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

358112, G01N 2900, H04N 300

Patent

active

042755956

ABSTRACT:
In an exemplary embodiment, an examination object is scanned line-by-line with an ultrasonic beam and the developing echo signals are correspondingly recorded line-by-line on an image recording installation to form a visible image. The echo recording is to ensue amplitude-compressed without a simultaneous deterioration of the resolution or of the image sharpness. To this end, a preselectable plurality of echo lines (Z.sub.n through Z.sub.n+3) which preferably determine the breadth of a surround field for echoes to be depicted together with a current line (Z.sub.n+4) are always written into intermediate memories. Subsequently, the stored and, under certain conditions, current echo signal information are supplied to an evaluation installation. During a specific section time, which determines the depth (.tau.) of the surround field, a mean value of the echo intensity in the surround field is here at least approximately comprehended. This, if necessary after previous dynamic limitation, is placed in ratio at a ratio former to the echo respectively to be depicted. The ratio signal is the recording signal for the recording installation.

REFERENCES:
patent: 4135140 (1979-01-01), Buchner
patent: 4167753 (1979-09-01), Lynk
patent: 4174705 (1979-11-01), Buchner

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