Patent Number: 6,297,490

Title: Method and apparatus for determining the centre photodetector in a digital scintillation camera

Abstract: A method and apparatus for determining the centre photodetector in a planar array of photodetectors of a gamma scintillation camera is provided. The analog signals generated by a plurality of photomultiplier tubes (PMT) following a scintillation event, are digitized, integrated, and stored in a first memory. A first comparison means is used to divide the set of PMT logical signals into groups. Each group comprises an arbitrary number of PMTs. The PMT logical signals within a group are combined into pairs and compared to select the highest intensity value for each individual group. Subsets of local PMT highest intensity values are created. A second comparison means is used to receive the subsets of local PMT highest values, combine them into pairs, compare the paired signals, and record the selected signals in a second memory, until a PMT with the maximum intensity value or a centre PMT is obtained. The data stored during processing are then arranged in a versatile look up table to facilitate the assembly of relevant information characterizing the distribution of scintillations around the centre photodetector.

Inventors: Schreck; Zoltan (Ville de Lery, CA), Stark; Iain (Manotick, CA)

Assignee: 152 Research Inc.

International Classification: G01T 1/00 (20060101); G01T 1/208 (20060101); G01T 001/20 ()

Expiration Date: 10/02/2018