Which of the following is NOT a factor that affects quality in radiography?

In radiography, sharpness, distortion, and contrast are all fundamental factors that directly impact the quality of an image. Sharpness refers to the clarity and detail visible in the radiographic image, with well-defined edges indicating higher quality. Distortion relates to the accuracy of the radiographic representation of the subject; any misrepresentation can result in a distorted image that diminishes diagnostic utility. Contrast defines the degree of difference between various shades in the image, influencing the ability to differentiate between structures in the radiographic film.

Brightness, while it can affect the overall appearance of an image, does not inherently affect the quality of the image in the same critical manner as the other factors listed. It is more about the level of exposure and processing conditions of the radiograph rather than the inherent qualities of the image that contribute to its diagnostic value. Therefore, brightness can often be adjusted without impacting the true quality metrics that define the effectiveness of radiographic imaging.