Digital mammary gland X-ray machine and automatic exposure image optimization method thereof

The invention provides a digital mammary gland X-ray machine and an automatic exposure image optimization method thereof.The digital mammary gland X-ray machine comprises a mammary gland X-ray machine base, a spherical pipe support, a spherical pipe, a mammary gland beam limiter, a stepping motor, a lead screw, a potentiometer, a lead screw nut, a pressure sensor, a compressor and a breast supporting frame.The spherical pipe is arranged on the top of the spherical pipe support.The mammary gland beam limiter is arranged on the spherical pipe support, located below the spherical pipe and used for filtering out hard rays or soft rays in X rays emitted by the spherical pipe and prompting the irradiation range of X rays.The stepping motor is arranged on the mammary gland X-ray machine base.The lead screw is connected with the stepping motor.The lead screw nut is arranged on the lead screw.The pressure sensor is connected with the lead screw nut.The compressor is connected with the pressure sensor.The breast suppor