Continuous photographing system in capacitor type x-ray device

Abstract

Abstract PURPOSE:To perform fine concentration adjustment of film with simple operation by setting the total exposure amount prior to photographing, and allowing a CPU to emit the set exposure amount divided into an integer number of X-ray exposures in which the ripple ratio of the output is taken into consideration from the set tube voltage value. CONSTITUTION:Prior to photographing, a calculator 24 calculates the X-ray exposure amount per occasion and the number of photographings from a preset ripple ratio, the total exposure amount of X-rays (mAs), and the set tube voltage (kV). The data of calculated X-ray exposure amount (mAs) per occasion is sent to an X-ray shutoff circuit 28, which makes time-counting upon receiving X-ray output (X-ray ON) signal from an X-ray exposure circuit 30, and when the time is up to the correspondence to the calculated mAs value, an X-ray shutoff (X-ray OFF) signal is sent to a charging control circuit 32, to start charging. The calculated number of photographings is preset on a counter 26, and an increment is made upon receiving the signal at every X-ray exposure, and when the number of photographings is attained, feed of X-ray output signal by the X-ray exposure circuit 30 is suppressed.

Inventors

• 👤 Akira Saito

Bibliographic Details