How does increased quantum mottle affect spatial resolution?

Increased quantum mottle refers to the grainy or speckled appearance seen in an image, typically caused by insufficient x-ray photon quantity reaching the detector. This phenomenon is related to the statistical nature of photon detection, where lower exposure results in higher variability in the number of photons recorded, leading to random noise in the image.

Spatial resolution is the ability of an imaging system to distinguish small details or separate structures in an image. When quantum mottle is pronounced, various areas of the image become less distinct because the noise obscures finer details. The random fluctuations in light intensity disrupt the clarity of the image, ultimately leading to a decrease in the sharpness and accuracy of the representation of structures—therefore, reducing spatial resolution.

When interpreting images with significant quantum mottle, it becomes challenging to identify small, closely spaced features, which are critical for accurate diagnosis. Thus, the presence of increased quantum mottle directly correlates with a deterioration in spatial resolution.