| 摘要 |
PURPOSE:To provide an automatically setting device of X-ray photographing tube voltage which can automatically set appropriate photographing tube voltage in oesophagus photographing and pressure photographing. CONSTITUTION:A correction circuit 30 in which photographing environmental conditions comprising picture signal sent from a TV camera control circuit 14, a bed falling angle signal from a falling controller 6, and split size signal such as four split signal or right and left two split signal in a split mask 7 from a split mask control circuit 8 are inputted and from which control signal is outputted to a photographing voltage automatic control circuit 19 is arranged. In the correction circuit 30, when oesophagus photographing is conducted to a patient 5, rising correction signal, and when pressure photographing is conducted, falling signal are outputted as control signal to the photographing voltage automatic control circuit 19 respectively. In oesophagus photographing, photographing voltage is set high against the same fluoroscopy tube voltage. In pressure photographing, the voltage is set low. |
