[Triumf-seminars] TRIUMF Seminar today at 14:00

[postmaster at admin.triumf.ca]

Date/Time: Thu 2007-12-20 at 14:00

Location:  Auditorium          

Speaker:   Philip Lu (UBC)

Title:     A liquid Xenon detector for Positron Emission Tomography

Abstract: Positron Emission Tomography (PET) relies on the beta decays of radiopharmaceuticals which produce positrons that will subsequently annihilate and produce two detectable back-to-back 511 keV gamma rays.  Traditional PET scanners employ solid scintillating crystals as their detection media.  But such systems suffer from poor energy resolutions, parallax errors, Compton blurring, and low detection sensitivities.  To address these shortcomings, the application of liquid xenon time projection chamber for PET purposes has been proposed. We constructed GEANT4 simulations of a liquid xenon PET detector and studied its potential performance.  In particular, we examined carefully how the Compton reconstruction algorithm performed on different event topologies, and identified the inherent geometrical limit to its effectiveness.  We found that liquid xenon technology greatly improves the imaging quality of PET scans compare to currently available detectors.

Stimulants available 15 minutes before the talk.

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