NDLI: A comparison of methods to calculate the energy spectrum of a PET system operating in coincidence mode

Content Provider	IEEE Xplore Digital Library
Author	Goertzen, A.L. Joon Young Suk Thompson, C.J.
Copyright Year	2007
Description	Author affiliation: Univ. of Manitoba, Winnipeg (Goertzen, A.L.)
Abstract	PET system energy response is normally characterized with the system operating in singles detection mode. However, there are many imaging situations in which the energy spectrum of coincidence events can be different that that measured in singles mode. In this work we develop a simple method to measure the energy spectrum of coincidence events in a PET system operating in coincidence mode. The method uses a linear combination of two sets of coincident count measurements, one made by stepping the lower level discriminator (LLD) and the other made by stepping the upper level discriminator (ULD). Monte Carlo simulations were used to generate coincident count data for the geometry of a Siemens microPET R4 that included a model of the intrinsic radioactivity present in the scintillator crystals. The results indicate that the energy spectrum calculation method we propose here accurately recovers the true energy spectrum of the coincident events including the $beta^{-}$ emission spectrum characteristic of the $^{176}Lu$ present in the LSO scintillator crystals. In addition, the 511 keV photopeak location and FWHM energy resolution were measured using the calculation technique. This spectrum calculation technique can be used for any tomograph that can independently vary the upper and lower discriminator levels.
Starting Page	3709
Ending Page	3712
File Size	536666
Page Count	4
File Format	PDF
ISBN	9781424409228
ISSN	10957863
DOI	10.1109/NSSMIC.2007.4436927
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-10-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Positron emission tomography Energy measurement Event detection Crystals Helium Brain Solid scintillation detectors Nuclear and plasma sciences Geometry Solid modeling Monte Carlo simulation positron emission tomography energy spectrum coincidence LSO intrinsic activity
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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Validation of GATE simulations of the $^{176}Lu$ intrinsic activity in LSO detectors

Simulation results of a small animal liquid xenon PET detector

Comparison of LuYAP, LSO and BGO as scintillators for high resolution PET detectors

Monte Carlo simulation study of LSO crystals

Validation of a GATE Model of $^{176}$Lu Intrinsic Radioactivity in LSO PET Systems

Monte Carlo simulation study on the time resolution of a PMT-quadrant-sharing LSO detector block for time-of-flight PET

Investigation of the block effect in LSO detectors

Characterization of LSO/PMT scintillation pulses

Light output measurements of LSO single crystals and 4/spl times/8 arrays: comparison of experiment with Monte Carlo simulations

A comparison of methods to calculate the energy spectrum of a PET system operating in coincidence mode

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