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

Abstract

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 supporting frame is located below the compressor.After the mammary gland type is determined, hard rays or soft rays in X ray are filtered out through the mammary gland beam limiter so that the penetrating force of remaining X rays can be changed, and it can be guaranteed that an optimal image is acquired and the radiation dosage a patient suffering from can be reduced.

Description

technical field [0001] The invention relates to the technical field of medical electronic equipment, in particular to a digital mammary X-ray machine and an automatic exposure image optimization method thereof. Background technique [0002] The automatic exposure control mode of the current digital mammography machine is usually as follows: the digital mammography machine uses a compressor to compress the breast, and the system judges the size and density of the breast by analyzing the breast thickness and pressure after compression, so as to determine the X-rays used tube voltage, and then the system uses the combination of the tube voltage and a fixed tube current time product (such as 10mAs) to perform a pre-exposure, and calculates the gray level of the pre-exposure image obtained through the pre-exposure The required tube current time product, when the exposure dose reaches the calculated value, the exposure is stopped, so as to realize automatic exposure control. In t...

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Problems solved by technology

[0005] In view of the deficiencies in the prior art above, the object of the present invention is to provide a digital mammography machine and its automatic exposure image optimization method, aiming at solving the problem of determining the required value of the digital mammography machine in the prior art during automatic exposure. The tube current time product is inaccurate, resulting in poor image quality

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