Optimized stochastic resonance signal detection method

A method of increasing the probability of detecting at least one micro-calcification lesion in a mammogram, said method comprising the steps of:na. obtaining digital mammogram data by using an X-ray digital mammography system;b. calculating stochastic resonance noise with a processor by determining the stochastic resonance noise probability density function that does not increase the probability of false alarm and calculating the stochastic resonance noise data probability density function from a known probability density function for said digital mammogram data, wherein the stochastic resonance noise probability density function equals pnopt(n)=λδ(n−n1)+(1−λ)δ(n−n2), with values n1 and n2 equal to two delta function locations having probabilities of λ and 1−λ respectively, where n1 and n2 denote two discrete vectors, λ denotes the probability of occurrence of said two vectors, and n is a randomization of said two discrete vectors added with the probabilities of λ and 1−λ, respectively; andc. adding said stochastic resonance noise to said digital mammogram data by using said processor, thereby improving the detection of said at least one micro-calcification lesion in the mammogram.