抄録
Gradation is very important in the image-diagnosis of a tissue by ultrasonotomography. This paper is concerned with the high-gradation display method using both black and white and color monitors.
Ultrasonotomograms are programably displayed in black and white so that any kind of gradation-characteristics may be obtained. Color has good discrimination, but it yields sometimes less recognizable whole image of a tissue. In order to improve it and to provide effective diagnosis a coloring method has been introduced in such a way that (1) a continuous luminance curve be based on a B/W monitor, (2) possible colors limited by the luminance be specified successively so that the gradation levels of picture elements should be continuous in luminance and chromaticity.
These computations and processings are implemented by a built-in microcomputer. Besides, the developed imaging system displays the gradated images fast without losing the original ultrasonotomogram.
