Medical X-ray imaging equipment, after a century of development, from washed film to CR, and then to digital DR, reflecting the continuous pursuit of low-dose irradiation and high-quality images. Medical X-ray imaging equipment imaging quality is actually determined by what indicators, the process will be affected by what factors? Medical X-ray manufacturers Perlove Medical for you to answer. Contrast (density resolution), spatial resolution, gray level of the image, astigmatism, exposure conditions, signal conversion process, post-processing of the image.
The main indicators affecting the imaging quality of medical X-ray imaging equipment:
1, contrast (density resolution)
Refers to the density difference between adjacent tissue images on the X-ray image.
Spatial resolution reflects the image of fine structure resolution and tissue reconstruction ability, determined by the number of pixels per unit area. The number of pixels per unit area is much lower in digital imaging than in analog imaging. Therefore, the spatial resolution of digital imaging is not as high as that of analog X-ray images.
The number of gray levels is determined by 2N, which is the number of digits of a binary number, often referred to as bits, and is used to represent the gray level accuracy of each pixel.
The main factors affecting the imaging quality of X-ray imaging equipment:
1, scattered rays
The formation of scattered rays is generated by the X-ray primary rays irradiated to the illuminated body and its interaction, usually all away from the direction of the primary radiation is called scattered rays. It has a photo-sensitive effect on the photo, can produce image density, the formation of gray fog, so that the photo gray fog increases, affecting image sharpness and contrast, so that the image becomes blurred seriously affect the diagnostic value of the photo.
2、Exposure conditions
If the exposure conditions are too low, it is possible to miss the diagnostic information, in the image shown as spots, fine particles, mesh or snowflake-like abnormal structure; exposure conditions are too high, so that some minor lesions can be easily penetrated, the contrast between the tissues is reduced, the resolution is reduced.
3, signal conversion process
For digital X-ray imaging equipment, in the analog signal and digital signal conversion process, there will inevitably be signal loss.
4、Post-processing of images
Image post-processing can help us get high-quality images, but if not used properly will also bring negative effects.
Perlove Medical multi-function dynamic DR equipment PLX8100 has powerful image post-processing functions. The self-developed tissue equalization technology, based on the multi-layer graded detail equalization algorithm that extends the low gray area to the high gray area, makes the human body image through the tissue equalization, the image details are prominent and obvious, and the fine blood vessels at the end of the lung texture and the texture of the bones and the muscle level can be clearly displayed. In addition, it can also be extended with fully intelligent IBS control function, which automatically recognizes the information of the photographed body without manually adjusting the exposure parameters, realizing fast and stable image output.
