Estimation of position resolution for DOI-PET detector using φ 0.2 mm WLS fibers

N. Kaneko, H. Ito, S. Han, K. Kamada, H. Kawai, S. Kodama, A. Kobayashi, M. Tabata, Y. Shoji, A. Yoshikawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

We have been developing a submillimeter resolution and low-cost DOI-PET detector using wavelength shifting fibers (WLSF), scintillating crystal plates and MPPCs (Hamamatsu Photonics). Conventional design of DOI-PET detectors had approximately mm3 of resolution by using some scintillating blocks with a volume of 1 mm3, which detects gamma-ray. They are expensive due to difficulties in processing scintillating crystals and a large number of photo-detectors, and these technologies are likely to reach the limit of the resolution. Development of a lower cost DOI-PET detector with higher resolution is challenging to popularize the PET diagnosis. We propose two type of PET detector. One is a whole body PET system, and the other is a pet system for brain or small animals. Each PET system consists 6 blocks. The former consists of 6 layers of crystal plates with 300 mm × 300 mm × 4 mm. The latter consists of 16 crystal layers, forming 4 × 4 crystal arrays. The size of the crystal plate is 40 mm × 40 mm × 1 mm. Wavelength shifting fiber (WLSF) sheets are attatched to above and up and down side of crystal planes. The whole PET system has 8 MPPCs attached on each side. For the brain PET detector, 9 WLSF fibers are attached on the each side. The expected position resolution would be less than 1 mm at the former system. We have performed an experimental performance estimation for the system component using 22Na radioactive source. We achieved a collection efficiency of 10% using the WLSF sheet and Ce:Gd3(Al, Ga)5O12 (GAGG) crystals at 511 keV. The linear relationship between reconstruction position and incident position was obtained, and a resolution of 0.7 mm (FWHM) for x-axis of DOI by the WLSF readout was achieved.

Original languageEnglish
Title of host publication2015 4th International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications, ANIMMA 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479999187
DOIs
Publication statusPublished - 2015 Jan 1
Event4th International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications, ANIMMA 2015 - Lisbon, Portugal
Duration: 2015 Apr 202015 Apr 24

Publication series

Name2015 4th International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications, ANIMMA 2015

Other

Other4th International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications, ANIMMA 2015
CountryPortugal
CityLisbon
Period15/4/2015/4/24

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiation
  • Instrumentation
  • Nuclear and High Energy Physics

Fingerprint Dive into the research topics of 'Estimation of position resolution for DOI-PET detector using φ 0.2 mm WLS fibers'. Together they form a unique fingerprint.

Cite this