Patent ID: 9329302
Filing Date: 2016-05-03
CPC Classification: G01T,G01V

Claim Text:
1. A method of detecting gamma rays using a gamma ray detector comprising: determining a first count of gamma rays having an energy in a first energy interval, using a controller coupled to the gamma ray detector; determining a second count of gamma rays having an energy in a second energy interval, the second energy interval having a higher energy than the first energy interval, using the controller; determining a third count of gamma rays having an energy in a third energy interval, the third energy interval having a higher energy than the second energy interval, using the controller; compensating the second count of gamma rays for noise based upon a ratio of the second count and the third count, using the controller; adjusting a system gain of the gamma ray detection system such that the ratio of the second count and the third count is constant in an absence of noise in the first energy interval; and detecting noise in the first energy interval based upon a ratio of the first count to the second count exceeding a given ratio, and ceasing system gain adjustment based thereupon.