NDLI: Timing resolution improved by DOI information in an LYSO TOF-PET detector

Content Provider	IEEE Xplore Digital Library
Author	Shibuya, K. Nishikido, F. Inadama, N. Yoshida, E. Chihfung Lam Tsuda, T. Yamaya, T. Murayama, H.
Copyright Year	2007
Description	Author affiliation: Nat. Inst. of Radiol. Sci., Chiba (Shibuya, K.; Nishikido, F.; Inadama, N.; Yoshida, E.; Chihfung Lam; Tsuda, T.; Yamaya, T.; Murayama, H.)
Abstract	Depth-of-interaction (DOI) detectors are considered to be advantageous to time-of-flight positron emission tomography (TOF-PET) because they can observe timing error arising in the scintillation crystals due to a propagation speed difference between annihilation radiation and scintillation photons. We experimentally measured this timing error in our four-layer DOI detector. The upper layer exhibited a larger timing delay due to the longer path length after conversion from annihilation radiation into scintillation photons that traveled with the zigzag paths at a decreased speed by a factor of the refractive index (n). The maximum timing delay between the first and fourth layers was evaluated as 164 ps when n=1.47. Because this delay can be corrected using three-dimensional crystal address, thick detector can be employed for TOF-PET to achieve a higher sensitivity without degrading the timing resolution. This demonstration was the first step for a DOI-TOF-PET.
Starting Page	3678
Ending Page	3680
File Size	191053
Page Count	3
File Format	PDF
ISBN	9781424409228
ISSN	10957863
DOI	10.1109/NSSMIC.2007.4436919
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-10-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Timing Photonic crystals Solid scintillation detectors Radiation detectors Optical propagation Positron emission tomography Delay Refractive index Voltage Photomultipliers
Content Type	Text
Resource Type	Article

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