A radiograph detector pixel registers a mean count of photons in one exposure
PHYSICS · Subjective · Fermi University Physics · Biophysics & Medical Physics · Radiation physics and diagnostic imaging · Radiation physics and diagnostic imaging
Life at Thermal Energy, Ch Images from attenuation and from decay
Problem
A radiograph detector pixel registers a mean count of N=8100 photons in one exposure. Using the result that a photon count's variance equals its mean, find the standard deviation of the count, and express it as a percentage of the mean count, the size of the quantum noise relative to the signal.