by Marcinkowski, R, España, S, Van Holen, R and Vandenberghe, S
Abstract:
The majority of current whole-body PET scanners are based on pixelated scintillator arrays with a transverse pixel size of 4 mm. However, recent studies have shown that decreasing the pixel size to 2 mm can significantly improve image spatial resolution. In this study, the performance of Digital Photon Counter (DPC) from Philips Digital Photon Counting (PDPC) was evaluated to determine their potential for high-resolution whole-body time of flight (TOF) PET scanners. Two detector configurations were evaluated. First, the DPC3200-44-22 DPC array was coupled to a LYSO block of 15 texttimes 15 2 texttimes 2 texttimes 22 mm(3) pixels through a 1 mm thick light guide. Due to light sharing among the dies neighbour logic of the DPC was used. In a second setup the same DPC was coupled directly to a scalable 4 texttimes 4 LYSO matrix of 1.9 texttimes 1.9 texttimes 22 mm(3) crystals with a dedicated reflector arrangement allowing for controlled light sharing patterns inside the matrix. With the first approach an average energy resolution of 14.5% and an average CRT of 376 ps were achieved. For the second configuration an average energy resolution of 11% and an average CRT of 295 ps were achieved. Our studies show that the DPC is a suitable photosensor for a high-resolution TOF-PET detector. The dedicated reflector arrangement allows one to achieve better performances than the light guide approach. The count loss, caused by dark counts, is overcome by fitting the matrix size to the size of DPC single die.
Reference:
Optimized light sharing for high-resolution TOF PET detector based on digital silicon photomultipliers. (Marcinkowski, R, España, S, Van Holen, R and Vandenberghe, S), In Physics in Medicine and Biology, IOP Publishing, volume 59, 2014.
Bibtex Entry:
@article{Marcinkowski:2014ga,
author = {Marcinkowski, R and Espa{~n}a, S and Van Holen, R and Vandenberghe, S},
title = {{Optimized light sharing for high-resolution TOF PET detector based on digital silicon photomultipliers.}},
journal = {Physics in Medicine and Biology},
year = {2014},
volume = {59},
number = {23},
pages = {7125--7139},
month = dec,
publisher = {IOP Publishing},
affiliation = {Department of Electronics and Information Systems, MEDISIP, Ghent University-iMinds Medical IT-IBiTech, De Pintelaan 185 block B, B-9000 Ghent, Belgium.},
doi = {10.1088/0031-9155/59/23/7125},
pmid = {25365502},
language = {English},
rating = {0},
date-added = {2015-01-08T16:01:36GMT},
date-modified = {2020-07-09T13:27:49GMT},
abstract = {The majority of current whole-body PET scanners are based on pixelated scintillator arrays with a transverse pixel size of 4 mm. However, recent studies have shown that decreasing the pixel size to 2 mm can significantly improve image spatial resolution. In this study, the performance of Digital Photon Counter (DPC) from Philips Digital Photon Counting (PDPC) was evaluated to determine their potential for high-resolution whole-body time of flight (TOF) PET scanners. Two detector configurations were evaluated. First, the DPC3200-44-22 DPC array was coupled to a LYSO block of 15 {texttimes} 15 2 {texttimes} 2 {texttimes} 22 mm(3) pixels through a 1 mm thick light guide. Due to light sharing among the dies neighbour logic of the DPC was used. In a second setup the same DPC was coupled directly to a scalable 4 {texttimes} 4 LYSO matrix of 1.9 {texttimes} 1.9 {texttimes} 22 mm(3) crystals with a dedicated reflector arrangement allowing for controlled light sharing patterns inside the matrix. With the first approach an average energy resolution of 14.5% and an average CRT of 376 ps were achieved. For the second configuration an average energy resolution of 11% and an average CRT of 295 ps were achieved. Our studies show that the DPC is a suitable photosensor for a high-resolution TOF-PET detector. The dedicated reflector arrangement allows one to achieve better performances than the light guide approach. The count loss, caused by dark counts, is overcome by fitting the matrix size to the size of DPC single die.},
url = {http://stacks.iop.org/0031-9155/59/i=23/a=7125?key=crossref.879024b8df808f65f919bcffeffd0820},
uri = {url{papers3://publication/doi/10.1088/0031-9155/59/23/7125}}
}