The phase-modulated iso-density pseudocolor code of x-ray black and white medical images has been made by Ronchi grating. As a result, the intensified pseudocolor with highlight details are obtained. The theorem, procedure, and the results of that experiment are also given. Furthermore, the problems of pseudocolored experiment condition, color complement, and color repetition are discussed.
"Phase-modulated isodensity pseudocolor code of medical image", Proc. SPIE 1652, Medical Imaging VI: Image Processing, (1 June 1992); doi: 10.1117/12.59445; https://doi.org/10.1117/12.59445