METHOD OF CONTROL OF GEOMETRICAL QUALITY OF IMAGE OF DIGITAL X-RAY APPARATUS Russian patent published in 2009 - IPC A61B6/03 G03B42/02 

FIELD: medicine.

SUBSTANCE: invention concerns medical equipment. The method provides roentgenography of control rectangular radiopaque fine-grain lattice adjoining entrance window of the receiver of radiation, the subsequent visual analysis and measurement of the image of control lattice on the screen of video monitor connected to the computer. The video monitor is switched in the mode of stereocomparator and on its screen form stereopair which left image is the x-ray film of control lattice, and right - the test image of the same lattice generated by the computer. Analysis and measurements of the obtained stereopair are made the by means of stereoscope supplied with measuring brand, at horizontal and vertical mutual orientation of images of stereopair concerning eye basis of observer. Geometrical quality of the image in inspection zone is estimated on size of horizontal parallax Δp, under the formula , where h - excess the observable point of the image of lattice over zero plane, measured at stereopair observation, b - basis of stereoscope, s - main distance of stereoscope in a direction of the central beam.

EFFECT: application of the given method allows to increase accuracy of the control and to reduce operation time.

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