TY - GEN
T1 - A short drift GEM tracking detector for measuring escaped positrons in PET
AU - Cao, T.
AU - Azmoun, B.
AU - Purschke, M. L.
AU - Stoll, S.
AU - Vaska, P.
AU - Alexoff, D.
AU - Rhoades-Brown, A.
AU - Woody, C.
PY - 2012
Y1 - 2012
N2 - A short drift GEM detector has been studied for use as a tracking device for positrons emitted from isotopes used in PET. The detector utilizes a triple GEM detector with a short drift region above the GEM stack to collect the ionization from positrons that traverse the gap. An XY strip readout is used to measure two transverse coordinates and the drift time is used to measure the third coordinate in the drift direction. The three dimensional coordinates are used to construct a vector for the track which can be used to determine the direction of the incident positron. A full Monte Carlo simulation of the detector response was implemented and produced lines of response that were used for image reconstruction and compared with actual data from the detector, as well as to estimate the position and angular resolution for tracks incident on the detector at different angles. In addition, a separate Geant4 Monte Carlo program was used to evaluate the effect of multiple scattering of low momentum positron tracks. The motivation and possible applications for imaging thin structures in biological systems, such as plant leaves, is discussed and preliminary phantom results of positron imaging are presented.
AB - A short drift GEM detector has been studied for use as a tracking device for positrons emitted from isotopes used in PET. The detector utilizes a triple GEM detector with a short drift region above the GEM stack to collect the ionization from positrons that traverse the gap. An XY strip readout is used to measure two transverse coordinates and the drift time is used to measure the third coordinate in the drift direction. The three dimensional coordinates are used to construct a vector for the track which can be used to determine the direction of the incident positron. A full Monte Carlo simulation of the detector response was implemented and produced lines of response that were used for image reconstruction and compared with actual data from the detector, as well as to estimate the position and angular resolution for tracks incident on the detector at different angles. In addition, a separate Geant4 Monte Carlo program was used to evaluate the effect of multiple scattering of low momentum positron tracks. The motivation and possible applications for imaging thin structures in biological systems, such as plant leaves, is discussed and preliminary phantom results of positron imaging are presented.
UR - https://www.scopus.com/pages/publications/84881560333
U2 - 10.1109/NSSMIC.2012.6551651
DO - 10.1109/NSSMIC.2012.6551651
M3 - Conference contribution
SN - 9781467320306
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 2852
EP - 2855
BT - 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2012
T2 - 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2012
Y2 - 29 October 2012 through 3 November 2012
ER -