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Positive beam limitation (PBL) technology is primarily associated with the collimator. The collimator is an essential device used in radiography to limit the size and shape of the X-ray beam. PBL technology enhances this function by automatically adjusting the collimation to the size of the image receptor being used, thus preventing unnecessary exposure of surrounding tissues to radiation.

PBL works by utilizing a sensor that detects the size of the image receptor and automatically adjusts the collimator blades accordingly. This ensures that the X-ray beam is as small as possible while still covering the area of interest, optimizing image quality and minimizing patient radiation dose. This improvement in precision and safety is crucial in diagnostic radiology, making the use of PBL technology in collimators significant.

While grids, image receptors, and control panels are important components in the imaging process, they do not inherently involve PBL technology in the same way collimators do. Grids are used to improve image quality by absorbing scatter radiation, image receptors capture the X-ray images, and control panels interface with the X-ray machine to manage exposure settings, but none of these directly relate to the automatic beam limitation that PBL offers through collimation.