X-RAY DIAGNOSTIC APPARATUS Russian patent published in 1996 - IPC

FIELD: X-ray appartuses with adjusting autotransformer and digital facilities for setting high voltage and heater current. SUBSTANCE: apparatus uses calculating unit for analytical approximation of dependence I_a= F(K₁, K₂, K₃, I_h, U_a), where I_a is anode current of X-ray tube; I_h is heater current; U_a is high voltage; K₁, K₂, K₃ arefactors incorporated in approximation dependence constant for each particular tube throughout entire range of I_a, U_a, I_h and determined during apparatus calibration. EFFECT: provision for automatic setting of desired values of U_a and I_a due to using analytical approximation dependence for entire range of associated changes of I_a, U_a, I_h by setting autotransformer ratio and heater current dispensing with considerable calculating resources. 2 dwg