Patent ID: 9361275
Filing Date: 2016-06-07
CPC Classification: G01T,G06F

Claim Text:
1. A method for analyzing a signal of a radiation sensor, the method comprising: detecting a signal from a radiation sensor; identifying the presence of a multitude of steps in the signal from the radiation sensor, the steps being randomly spaced apart by signal plateaus; filtering the signal plateaus; estimating the height of each step; forming a density distribution or a histogram based on the estimated heights; and determining the composition from the density distribution or histogram; wherein a variance of the height of each step is estimated using an estimate of the variance of the signal plateau preceding the step and an estimate of the variance of the signal plateau following the step, the estimate of the variance of each of the signal plateaus based on the length of time over which the signal plateau occurs; and each of the multitude of steps contributing to the density distribution or histogram according to a weight factor, the relationship between the weight factor and the step height variance being such that the value of the weight factor increases as a function of decreasing step height variance.