Comparison of acrylic polymer adhesive tapes and silicone optical grease in light sharing detectors for positron emission tomography.
Comparison of acrylic polymer adhesive tapes and silicone optical grease in light sharing detectors for positron emission tomography.
Phys Med Biol. 2018 Jan 16;:
Authors: Van Elburg DJ, Noble SD, Hagey S, Goertzen AL
Abstract
Optical coupling is an important factor in detector design as it improves optical photon transmission by mitigating internal reflections at light-sharing boundaries. In this work we compare optical coupling materials, namely double-sided acrylic polymer tapes and silicone optical grease (SiG), in the context of positron emission tomography (PET). Four double-sided tapes from 3M of varying thicknesses (0.229mm-1.016mm) and adhesive materials ('100MP', adhesive 100 'A100', 'VHB') were characterized with spectrophotometer measurements and photopeak amplitude and energy resolution measurements using lutetium-yttrium oxy-orthosilicate (LYSO) coupled to photomultiplier tubes (PMT) or silicon photomultipliers (SiPMs). Transmission spectra from the spectrophotometer showed over 80% transmission for all tapes at 420nm and above, with 89.6% and 88.8% transmission for 0.508mm and 1.016mm thick VHB tapes, respectively, at 420nm. Measurements with single-pixel LYSO-PMT and 4×4 array (one-to-one coupled) LYSO-SiPM setups determined that SiG had the greatest photopeak amplitude, with tapes showing 2.1%-14.8% photopeak amplitude reduction with respect to SiG. Energy resolution changed by <4% on a relative basis between...
Source: Physics in Medicine and Biology - Category: Physics Authors: Van Elburg DJ, Noble SD, Hagey S, Goertzen AL Tags: Phys Med Biol Source Type: research