Full-automatic exposure control method and device of digital mammary gland X-ray imaging system

Abstract

The invention discloses a full-automatic exposure control method and device of a digital mammary gland X-ray imaging system. The method includes the steps of obtaining stress and the stress thickness, and calculating the corresponding pre-exposure voltage KV1 according to the stress and the stress thickness; conducting pre-exposure according to the obtained pre-exposure voltage KV1 and preset mAs1 to obtain a pre-exposed image; detecting the texture region of the pre-exposed image, and judging the type of the texture region, wherein types of the texture region include compact texture, loose texture and conventional texture; regulating the exposure voltage KV2 according to the type of the texture region, calculating exposure mAs2 according to a preset formula, and conducting conventional exposure according to the exposure voltage KV2 and exposure mAs2 to obtain a conventionally-exposed image. Cost of the device is reduced; the texture density is determined through the grey level of the texture region in the pre-exposed image, KV values are automatically regulated, more precise exposure parameters are obtained, and high-quality images are obtained.

Description

technical field [0001] The invention relates to the field of automatic exposure control, in particular to a fully automatic exposure control method and device for a digital mammary X-ray imaging system. Background technique [0002] As an important topic of women's health, breast has been paid more and more attention. In recent years, the incidence of breast cancer has been increasing year by year, and it has become the most common malignant tumor in women, which seriously threatens women's health. Studies have shown that if breast cancer can be detected early, the cure rate will be greatly improved, so early diagnosis of breast cancer has very important clinical value. [0003] The early clinical findings of breast cancer show that there are tiny calcifications in the mammary gland. These tiny calcifications are difficult to find when using ultrasound equipment, and the use of digital mammography imaging system to examine the breast is an effective way to detect calcificat...

AI Technical Summary

Problems solved by technology

The problem with this method is that the exposure voltage KV value adjusted according to the compression force is not necessarily accurate because the compression force is greatly affected by factors such as placement, which may lead to insufficient penetration and loose tissue areas. Excessive penetrability of the tissue area, affecting image quality

The problem with this method is that it will not only increase the cost of equipment, but also because the sensor is installed between the detector and human tissue, it will attenuate the ray signal to a certain extent and reduce the signal-to-noise ratio of the image.

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