What does quantum mottle refer to in fluoroscopy?

Quantum mottle refers to the grainy or blotchy appearance that can occur in fluoroscopic images due to insufficient x-ray photon density reaching the image receptor. It is a result of statistical variations in the number of x-ray photons that interact with the imaging detector, which can lead to visual noise. In fluoroscopy, an inadequate number of x-ray photons can result in a lack of uniformity in the image, making it look mottled or speckled rather than smooth and continuous.

This phenomenon is particularly noticeable in imaging situations where there is low exposure or a high level of contrast between different tissues. When the quantum mottle is present, diagnostic quality may be compromised, making it harder for healthcare professionals to interpret images accurately. Thus, recognizing and mitigating quantum mottle is important for improving image quality in fluoroscopy and ensuring effective patient assessments.