[Comparison of a Radiation Dose During Standard Digital Radiography, Tomosynthesis, and Multislice Spiral Computed Tomography in an Experimental Study of Pediatric Anthropomorphic Phantom].

Objective: To compare a radiation dose obtained during standard digital radiography, tomosynthesis, and multislice spiral computed tomography (MSCT). Material and Methods: Life-size full body pediatric anthropomorphic mannequin phantom was examined with a Fujifilm FDR Ac Selerate 200 X-ray diagnostic apparatus and a Toshiba Aquilion Prime 64 computed scanner using the Piranha dosimetry equipment, as well as Gammex planar target, for comparison of the resolution of the apparatus. The effective radiation doses were calculated for different anatomical regions with the formulas specified in the methodical instructions, using the coefficients K and Kd. Results: The tables and graphs comparing the radiation dose when using different radiation diagnostic techniques were presented. The resolution of standard digital radiography versus that of tomosynthesis was analyzed. Fluctuations of the doses obtained were associated with the difference in the volume of irradiated tissue and in the presence of the doses in the irradiated volume of organs with high radiosensitivity. Optimal physical and technical parameters of photography were proposed, which could reduce a dose load on the patient, without significantly losing the quality of films. Conclusion: The effective doses of tomosynthesis were significantly higher than those of standard digital radiography (p < 0.05) while those of (MSCT) were above those of both X-ray and tomosynthesis, and the resolution of the latter was slightly lower.

[Digital X-ray study in the monitoring of collapse therapy in patients with destructive pulmonary tuberculosis].

Digital versus analogue X-ray studies in identifying different X-ray symptoms are analyzed; their accuracy, sensitivity, and radiation load on a patient were established. The costs of consumables used at digital and analogue X-ray studies have been calculated. An algorithm for monitoring artificial pneumothorax and pneumoperitoneum has been proposed for patients with destructive pulmonary tuberculosis. A procedure has been developed to determine a commissural process in the pleural cavity by digital X-ray study and X-ray computed tomography. The findings are indicative of the expediency and medicoeconomic effectiveness of digital X-ray study used in the monitoring collapse therapy in patients with destructive pulmonary tuberculosis.