a scintillator , having two faces , for use in medical diagnostic imaging devices , said devices including a plurality of light sensors for converting light generated in said scintillators to electrical signals , processors for converting the electrical signals to images and a monitor for displaying the images , said scintillator including a two dimensional distribution of intrinsic light controllers , said controllers changing the light distribution among the sensors to achieve a desired distribution wherein the light controllers focus the light such that the spread of light to detectors is reduced .