Because the filter screen filters out the characteristics of the ray, it will absorb a small part of the original emission line while filtering out the scattered line. Therefore, the exposure condition should be increased to increase the amount of the original emission line to offset the filter line. The amount of original emission line consumed by the gate to ensure image quality.
In photography, it is necessary to pay attention to the focus of the X-ray tube to coincide with the convergence line so that the radiation direction of the original emission line is consistent with the direction of the lead strip and pass through the grid. If the focus of the X-ray tube and the convergence line of the grid are not When the grid is in the coincident state, or the grid is placed within the specified focal length range, the original emission line loss will occur too much. The difference between the focus and the convergence line is larger, and the difference between the focal length and the focal length is The larger the volume, the greater the loss of the original emission line.
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