Model of a novel gamma camera collimator based on a uniformly redundant array
by Plemmons, Mark, Ph.D., THE UNIVERSITY OF TEXAS AT DALLAS, 2011, 209 pages; 3474692

Abstract:

Recent advances in production of NaI crystals have lead to the ability to manufacture crystals that are 1mm in thickness. Accordingly, a new and novel method for determining the angle of incidence of an incoming gamma photon has been facilitated. By placing 1mm square by 10mm crystals into a uniformly redundant array (URA) of cells manufactured into shielding material, the scintillator and collimator can effectively be combined into one unit. In theory, this will reduce the signal to noise ratio significantly. The reduction in signal to noise ratio is affected by the fact that independent, individually shielded crystals convert gamma photons into more readily detected visible photons. This phenomenon eliminates the need to ratio the signals produced in an array of detector optically coupled to a scintillator converting gamma photons from many different incident angles. This work models the signal-to-noise of URAs configured with NaI(Tl) from 1mm to 10mm with a lead shield ranging from 0.4mm up to 1mm.

 
AdviserRoy Chaney
SchoolTHE UNIVERSITY OF TEXAS AT DALLAS
SourceDAI/B 73-01, p. , Oct 2011
Source TypeDissertation
SubjectsOptics; Biophysics
Publication Number3474692
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