What factors determine the visibility of mottle in fluoroscopy?

The visibility of mottle in fluoroscopy is primarily influenced by factors such as resolution, sensitivity, and contrast level.

Resolution refers to the ability of the imaging system to reproduce fine details. Higher resolution allows for more distinct images, which can help in reducing the perception of mottle, a granular noise in the image caused by factors such as inadequate exposure or low radiation dose.

Sensitivity relates to how effectively the imaging system detects radiation. An increase in sensitivity allows the system to produce a usable image even with lower radiation levels, which can also improve the overall clarity and reduce the prominence of mottle.

Contrast level plays a critical role as well; it differentiates between various tissue densities in the image. Higher contrast can provide clearer distinctions between structures in the body versus noise, leading to reduced visibility of mottle.

In summary, the combination of resolution, sensitivity, and contrast significantly impacts the clarity of the fluoroscopic image and the visibility of mottle, which is why this is the correct answer in determining the factors influencing mottle visibility.