12 September 2014 A new columnar CsI(Tl) scintillator for iQID detectors
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Abstract
A 1650 μm thick columnar CsI(Tl) scintillator for upgrading iQID detectors, which is a high-resolution photon-counting gamma-ray and x-ray detector recently developed at the Center for Gamma-Ray Imaging (CGRI), has been studied in terms of sensitivity, spatial resolution and depth-of-interaction effects. To facilitate these studies, a new frame-parsing algorithm for processing raw event data is also proposed that has more degrees of freedom in data processing and can discriminate against a special kind of noise present in some low-cost intensifiers. The results show that in comparison with a 450 μm-thickness columnar CsI(Tl) scintillator, the 1650 μm thick CsI(Tl) scintillator provides more than twice the sensitivity at the expense of some spatial resolution degradation. The depth-of-interaction study also shows that event size and amplitude vary with scintillator thickness, which can assist in future detector simulations and 3D-interactionposition estimation.
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Ling Han, Brian W. Miller, H. Bradford Barber, Vivek V Nagarkar, Lars R. Furenlid, "A new columnar CsI(Tl) scintillator for iQID detectors", Proc. SPIE 9214, Medical Applications of Radiation Detectors IV, 92140D (12 September 2014); doi: 10.1117/12.2066179; https://doi.org/10.1117/12.2066179
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