What device protects the image receptor from being fogged by scatter radiation?

The Bucky or grid is the correct choice because it is specifically designed to reduce the amount of scatter radiation that reaches the image receptor. Scatter radiation can degrade the quality of the radiographic image by adding unwanted fog, which can obscure important details. The grid consists of thin lead strips arranged in a specific pattern that allows the primary radiation from the X-ray beam to pass through while absorbing a significant amount of scatter radiation. This results in a clearer, more defined image by minimizing the obscuring effect of scatter.

In contrast, while the collimator helps shape the X-ray beam and reduce excess exposure, it does not directly filter out scatter radiation once it is produced. A shielding panel is typically used to protect certain areas or individuals from excess radiation but does not function to protect the image receptor specifically. The X-ray apron is designed to protect patients and staff from radiation exposure rather than address the quality of the image receptor. Through its design and functionality, the grid enhances the diagnostic quality of radiographic images by maintaining the integrity of the image receptor against scatter interference.