Feasibility study of a lens-coupled charge-coupled device gamma camera

Hakjae Lee, Young Jun Jung, Jung Min Kim, Seungbin Bae, Kisung Lee, Jungwon Kang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A charge-coupled device (CCD) is generally used in a digital camera as a light-collecting device such as a photomultiplier tube (PMT). Because of its low sensitivity and very high dark current, CCD have not been popularly used for gamma imaging systems. However, a recent CCD technological breakthrough has improved CCD sensitivity, and the use of a Peltier cooling system can significantly minimize the dark current. In this study, we investigated the feasibility of a prototype CCD gamma camera consisting of a CsI scintillator, optical lenses, and a CCD module. Despite electron-multiplying (EM) CCDs having higher performance, in this study, we built a cost-effective system consisted of low-cost components compared to EMCCDs. Our prototype detector consists of a CsI scintillator, two optical lenses, and a conventional Peltier-cooled CCD. The performance of this detector was evaluated by acquiring the sensitivity, resolution, and the modulation transfer function (MTF). The sensitivity of the prototype detector showed excellent linearity. With a 1 mm-diameter pinhole collimator, the full width at half-maximum (FWHM) of a 1.1 mm Tc-99m line source image was 2.85 mm. These results show that the developed prototype camera is feasible for small animal gamma imaging.

Original languageEnglish
Pages (from-to)3631-3635
Number of pages5
JournalJournal of the Korean Physical Society
Volume59
Issue number61
DOIs
Publication statusPublished - 2011 Dec 15

Keywords

  • CCD
  • Gamma camera
  • Optical lens

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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