NDLI: WSF gamma camera with SiPMs: First small animal tests

Content Provider	IEEE Xplore Digital Library
Author	Castro, I.F. Soares, A.J.D. Moutinho, L.M. Ferreira, M.A. Ferreira, R. Combo, A. Muchacho, F. Santos, A.C. Veloso, J.F.C.A.
Copyright Year	2013
Description	Author affiliation: ISA - Intell. Sensing Anywhere S.A., Coimbra, Portugal (Ferreira, M.A.; Ferreira, R.; Combo, A.; Muchacho, F.) \|\| Fac. of M.ed., Univ. of Coimbra, Coimbra, Portugal (Santos, A.C.) \|\| Phys. Dept., Univ. of Aveiro, Aveiro, Portugal (Castro, I.F.; Soares, A.J.D.; Moutinho, L.M.; Veloso, J.F.C.A.)
Abstract	Following the introduction of the wavelength-shifting fiber (WSF) gamma camera by Soares et al. and evolution of photodiodes into highly sensitive silicon photomultipliers (SiPMs), we have assembled a WSF gamma camera applying SiPMs to individually read out 1 mm diameter WSFs carrying the position information of scintillation events in a continuous CsI(Na) crystal. Despite the challenge of using many SiPMs to read out light pulses of very low amplitude and slow decay time, at room-temperature, SiPMs show great potential to improve the spatial resolution and overall performance of the WSF gamma camera, due to their high photodetection efficiency. Moreover, they allow building a compact and low power consuming camera, aimed for breast-specific gamma imaging. Tests carried out with $^{57}Co$ and $^{99}mTc$ on a small prototype with 10×10 $mm^{2}$ field-of-view demonstrated the concept's feasibility and characterized its imaging performance. A larger camera with 10×10 $cm^{2}$ is being developed for clinical application, but isn't yet fully operational. Imaging of a small mouse injected with $^{99m}Tc-HMDP$ was therefore carried out by performing several scans with the small prototype. Despite experimental limitations, the resulting images compared favorably to those obtained by a traditional Anger camera. Furthermore, performance can be improved by several optimizations, in order to minimize and control effects of thermal noise and non-uniformity of response of multiple SiPMs.
Starting Page	1
Ending Page	6
File Size	408587
Page Count	6
File Format	PDF
e-ISBN	9781479905348
DOI	10.1109/NSSMIC.2013.6829099
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-10-27
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cameras Prototypes Crystals Spatial resolution Bones Energy resolution
Content Type	Text
Resource Type	Article

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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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