DEVICE FOR CONTRAST CALIBRATION OF DIAGNOSTIC x-RAY APPARATUSES Russian patent published in 2003 - IPC

FIELD: medical X-ray equipment, in particular, devices for measurement and monitoring of technical characteristics of diagnostic X-ray apparatuses, first of all, digital ones. SUBSTANCE: the device has a stepped absorber, whose components are fastened on a rigid base transparent to X-rays with a definite interval, additionally it has a flow-type ionization chambers with a power source and a measuring unit provided with a microprocessor and indicator, whose quantity twice exceeds the quantity of the absorber components. The ionization chambers make a number of optically conjugated pairs, with an absorber placed in each of them between the ionization chambers, the absorber represents a thin homogeneous standard layer of material with a high atomic number, located in parallel with the device base, besides, the ionization chambers are protected by a screen against scattered X-radiation. EFFECT: enhanced precision and truth of determination of the contrast characteristics of the diagnostic X-ray apparatuses. 7 dwg