What is "quantum mottle" in radiographic imaging?

Quantum mottle refers to the statistical variation in the number of X-ray photons that reach the image receptor during radiographic imaging. It is a phenomenon that arises due to the inherent randomness in the detection of individual photons, which can lead to variations in the density of the resulting image. In situations where the number of photons is limited, the fluctuations can result in a grainy appearance, affecting the overall image quality.

This concept is particularly important in low-exposure situations or with high-sensitivity detectors, where a reduced number of photons can lead to greater visibility of quantum mottle. Understanding quantum mottle is crucial for radiographers, as it influences the quality of diagnostic images. Proper exposure techniques and adjusting the dose appropriately can help minimize quantum mottle and improve image clarity.