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According to the World Health Organization (WHO), roentgenographic examinations constitute the major part of medical X-ray examinations. A roentgenographic apparatus should meet the following requirements: 1) high quality of imaging; 2) possibility of X-raying in main X-ray projections; 3) safety of patients and medical personnel; 4) easy installation and maintenance; 5) easy use; 6) possibility of working with autonomous power supply. The apparatus should implement functions of X-ray table and X-ray support and have three workplaces. According to WHO, apparatuses meeting these requirements are used to perform up to 50% of all X-ray examinations. Apparatuses of this type for film roentgenography are available from many manufacturers [2]. The same requirements can be extended to digital roentgenographic apparatuses, such as the ARTs-01-OKO digital roentgenographic apparatus available from Electron Scientific-Manufacturing Association (Fig. 1).The ARTs-01-OKO digital X-ray apparatus is used for roentgenographic examinations of a patient in standing, sitting, or supine positions. It provides Xraying in more than 100 standard projections of various organs and systems of the human body. A functional diagram of the apparatus is shown in Fig. 2.The X-ray power supply (XRPS) of the apparatus is based on inverter technology with power-line frequency conversion to kilohertz range. Voltage pulsations do not exceed 5%. The power supply allows varying the anode voltage within a range of 40 to 145 kV with a step of 1 kV. The quantity of electricity can be varied discretely within the range of 0.2 to 640 mAsec (34 steps).The X-ray source has a bifocal X-ray tube with focal spot sizes of 0.6 and 1.2 mm and a maximal voltage of 150 kV. The variable aperture diaphragm of the X-ray source has a disk with filters. Use of a high-power mid-range power supply and an X-ray source