What is the purpose of the pluggable design of the filter grids of an X-ray machine?


Filter grids are common components of X-ray machines. After the X-ray passes through the human body, it produces a longer wavelength, indeterminate direction of the continuation of the emission line that is scattered rays. The greater the energy of the primary rays, the thicker the limb penetrated, the higher the conditions of casting, the more scattered rays produced. Scatter rays are also fluorescent and photographic, sensitizing the film and reducing the contrast and sharpness of the image.

In order to reduce and eliminate the adverse effects of scattered rays in the projection, the most effective way is to use a filter grid. Filter grids help to filter out scattered rays, reduce gray haze, improve contrast, and make images clearer and sharper.

Sharper image after using a filter grid

Although a grating filters out scattered rays, it also absorbs some of the useful rays, resulting in a lower dose of x-rays. In order to maintain the same amount of x-rays as without the grids, the amount of primary rays has to be increased, and the risk of radiation dose increases accordingly.

Taking this into account, many manufacturers are in the X-ray equipment on the use of filter grids pluggable design, i.e., removable filter grids. For example, the PLX8100 multifunctional dynamic DR machine developed by domestic X-ray machine manufacturer PUAI Medical, uses a pluggable filter grid design, which can be freely removed according to the actual clinical situation. Combined with the DAP dose monitoring system, it displays the cumulative radiation dose absorbed by the patient in a single examination, making it easy to control radiation risks and take care of the patient’s health.

Multi-functional dynamic DR machine + workstation

In DR filming, the thicker the patient’s lesion is, the more stray rays there are, and the more filter grids are needed. On the other hand, thinner locations such as children’s torsos or adult limbs have fewer stray rays, and removing the filter grid will not improve the image quality, but will significantly reduce the radiation dose.

Therefore, X-ray machines with pluggable grids are designed to meet the low dose requirements for thin locations such as limbs and for specific groups of people such as gynecologists and pediatricians.


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