We require an x-ray image detector that is linear with respect to amplitude as well as having low aberration of the
image transmission channel. An x-ray visualizer based on a scintillation shield, light guide, image converter tube, and television
cameras, the signal from which is transmitted to a computer, is used. The linear resolution of the visualizer in the working
range of the x-radiation is on the order of 20 mm. We may either use a calibrated visualizer or perform independent calibration
by obtaining an image of a test object with known dimensions.