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What happens when the grid is placed upside down

Recently, a customer asked what would happen if the grid is reversed?
The wire grid is made of lead foil (that is, thin lead strips with a thickness of 0.05 to 0.1 mm) spaced at a certain distance (0.15 to 0.35 mm) and arranged in parallel or at a certain slope. Paper or wooden strips are filled and fixed, and both sides are supplemented with aluminum or synthetic resin protective layers.
Scattered rays are extremely harmful in X-ray photography. Because of its biological effects, that is, biological cells are inhibited, damaged, or even killed after being irradiated by different doses of X-rays. Therefore, scattered rays make the subject and the work Personnel increased unnecessary radiation dose and radiation damage, and increased the contrast of X-ray pictures, and even lost the possibility of useful information. For this reason, it is very important to remove scattered rays in X-ray photography. The grid is designed for this purpose.
When shooting, the grid is placed between the film and the body. The scattered rays cannot pass through the gap between the lead bars because of the angle with the lead bars, so most of them are absorbed by the lead bars, which greatly reduces the scattered rays received on the film. , Thereby improving the contrast of the image, improving the imaging quality of the X-ray film, and reducing the damage to the human body.
If the grid is inverted, the image will be very unclear, and the black and white contrast of the image will be obvious, so be sure not to reverse it when using it.

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Author:Lillian


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