Patent ID: 6297490
Filing Date: 2001-10-02
Classification: G01T

Abstract:
A method for determining a centre photo multiplying tube (PMT) from a plurality of PMTs, each said PMT for receiving scintillation light and generating an analog signal, said PMTs arranged in a planar array and outputting a set of PMT analog signals indicative of a scintillation event, the method comprising the steps of:a) converting said set of PMT analog signals into a set of PMT logical signals;b) dividing said plurality of PMTs into groups;c) forming pairs of said logical signals within said groups;d) comparing said paired logical signals of said groups and determining subsets of select signals and outputting a local PMT highest intensity value for each said groups so as to obtain a subset of local PMT highest intensity values; ande) repeating steps b) to d) for each said subset of local PMT highest intensity values until a PMT maximum intensity value representing said centre PMT is obtained.