Which device is used for compensating uneven thickness in radiography?

A compensating filter is specifically designed to address issues related to varying thickness or density within a radiographic image. When different parts of the object being imaged have unequal thickness, it can lead to uneven exposure on the radiograph. This uneven exposure may result in certain areas appearing overly dark or too light, which can obscure important details and hinder accurate diagnosis.

The compensating filter works by selectively attenuating the x-ray beam as it passes through the different thicknesses of the object. Thicker areas receive less radiation due to the filter's higher attenuation, while thinner areas allow more radiation to pass through. This balancing act helps to achieve a more uniform exposure across the entire image, thereby improving the overall quality and diagnostic value of the radiograph.

Other devices, while important in radiography, serve different purposes. A grid is primarily used to reduce scatter radiation and improve image contrast but does not specifically compensate for uneven thickness. A collimator is used to restrict the x-ray beam to a specific area of interest, helping to minimize patient exposure and improve image quality, but it does not address exposure differences due to thickness. A protective filter is not a standard term in radiographic practice, and it would not serve the specific function of compensating for uneven thickness