Optimizing the performance of a PET detector using discrete GSO crystals on a continuous lightguide
- 1 June 2000
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Nuclear Science
- Vol. 47 (3) , 1030-1036
- https://doi.org/10.1109/23.856543
Abstract
The authors are designing a new detector for PET scanners using discrete 4×4×10 mm3 GSO(Ce) crystals on a continuous lightguide with 39 mm photomultiplier tubes. The lightguide is designed to optimize identification of the 4 mm crystals while also minimizing the detector dead area for a given event, thereby reducing pulse pileup at high count rates. The authors' simulations show that a 1.8 cm thick lightguide produces a narrow Light Response Function (LRF) with good crystal discrimination. The LRF describes the spread of light from the crystal to the PMT array. Further improvement is achieved by extending the lightguide to 2.3 cm in thickness, but with 0.5 cm slots cut in its front surface, which results in reduced tails of the LRF The slotted lightguide also minimizes the spatial dependence of event positioning on different depths of interaction of the gamma ray. Experiments are in general agreement with the simulations. The good spatial resolution and narrow LRF of such a detector will result in high performance for a PET scanner which is based on the CSO detectorKeywords
This publication has 18 references indexed in Scilit:
- A high-resolution GSO-based brain PET cameraPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- A more physical approach to model the surface treatment of scintillation counters and its implementation into DETECTPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Slotted surface treatment on position-sensitive NaI(Tl) detectors to improve spatial resolutionPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Energy resolution of scintillation detectors readout with large area avalanche photodiodes and photomultipliersIEEE Transactions on Nuclear Science, 1998
- An analog decoding BGO block detector using circular photomultipliersIEEE Transactions on Nuclear Science, 1995
- A comparison of PET detector modules employing rectangular and round photomultiplier tubesIEEE Transactions on Nuclear Science, 1995
- Effect of refraction index and light sharing on detector element identification for 2D detector modules in Positron Emission TomographyNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1994
- Surface reflection: physical and geometrical perspectivesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1991
- Figures of Merit for Different Detector (Configurations Utilized in High Resolution Positron CamerasIEEE Transactions on Nuclear Science, 1986
- A Multicrystal Two Dimensional BGO Detector System for Positron Emission TomographyIEEE Transactions on Nuclear Science, 1986