Preliminary studies of PQS PET detector module for dose verification of carbon beam therapy

H. I. Kim, S. Jung An, C. Y. Lee, W. J. Jo, E. Min, Kisung Lee, Y. Kim, J. Joung, Y. H. Chung

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

PET imaging can be used to verify dose distributions of therapeutic particle beams such as carbon ion beams. The purpose of this study was to develop a PET detector module which was designed for an in-beam PET scanner geometry integrated into a carbon beam therapy system, and to evaluate its feasibility as a monitoring system of patient dose distribution. A C-shaped PET geometry was proposed to avoid blockage of the carbon beam by the detector modules. The proposed PET system consisted of 14 detector modules forming a bore with 30.2 cm inner diameter for brain imaging. Each detector module is composed of a 9 × 9 array of 4.0 mm × 4.0 mm × 20.0 mm LYSO crystal module optically coupled with four 29 mm diameter PMTs using Photomultiplier-quadrant-sharing (PQS) technique. Because the crystal pixel was identified based upon the distribution of scintillation lights of four PMTs, the design of the reflector between crystal elements should be well optimized. The optical design of reflectors was optimized using DETECT2000, a Monte Carlo code for light photon transport. A laser-cut reflector set was developed using the Enhanced Specular Reflector (ESR, 3M Co.) mirror-film with a high reflectance of 98% and a thickness of 0.064 mm. All 81 crystal elements of detector module were identified. Our result demonstrates that the C-shaped PET system is under development and we present the first reconstructed image.

Original languageEnglish
Article numberC05025
JournalJournal of Instrumentation
Volume9
Issue number5
DOIs
Publication statusPublished - 2014 May 1

Fingerprint

Quadrant
quadrants
Photomultipliers
Therapy
therapy
Dose
Carbon
Sharing
modules
Detector
Reflector
Detectors
Module
dosage
reflectors
carbon
detectors
Crystal
Crystals
crystals

ASJC Scopus subject areas

  • Instrumentation
  • Mathematical Physics

Cite this

Preliminary studies of PQS PET detector module for dose verification of carbon beam therapy. / Kim, H. I.; An, S. Jung; Lee, C. Y.; Jo, W. J.; Min, E.; Lee, Kisung; Kim, Y.; Joung, J.; Chung, Y. H.

In: Journal of Instrumentation, Vol. 9, No. 5, C05025, 01.05.2014.

Research output: Contribution to journalArticle

Kim, H. I. ; An, S. Jung ; Lee, C. Y. ; Jo, W. J. ; Min, E. ; Lee, Kisung ; Kim, Y. ; Joung, J. ; Chung, Y. H. / Preliminary studies of PQS PET detector module for dose verification of carbon beam therapy. In: Journal of Instrumentation. 2014 ; Vol. 9, No. 5.
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