FIELD: medical devices. SUBSTANCE: solid body image generator receives sequence of time samples during waiting time before radiation by X-ray source. Signal, which is received by charge-coupled device, is compared to threshold value in unit, which detects start of X-ray radiation. This is represented by rapid alteration of signal level. Threshold detection conditions alter according to alterations in environment state, including temperature alterations taking into account shadow current increase with temperature increase. This results in possibility to set threshold value, upon which charge-coupled device is started at moment, when image is received, by relatively low value. EFFECT: minimal probability of false start. 10 cl, 4 dwg
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