Development of a gamma camera based on an 8×8 array of LaBr 3(Ce) scintillator pixels coupled to a 64-channel multi-anode PMT

H. Kubo, K. Hattori, C. Ida, S. Iwaki, S. Kabuki, S. Kurosawa, K. Miuchi, T. Nagayoshi, H. Nishimura, Y. Okada, R. Orito, A. Takada, T. Tanimori, K. Tsuchiya, K. Ueno

研究成果: Conference contribution

10 被引用数 (Scopus)

抄録

We have developed a gamma camera based on an array of LaBr3(Ce) scintillator pixels coupled to a multi-anode photomultiplier tube (MAPMT). It consisted of an 8×8 array of LaBr3(Ce) pixels with a size of 5.8×5.8×15 mm3 and a 64-channel MAPMT (Hamamatsu flat-panel H8500) with an effective area of 49×49 mm2. The pixels of the LaBr3(Ce) array were made from two LaBr3(Ce) monolithic crystals with a diameter of 38 mm and a height of 38 mm, which had energy resolutions of 4.33+0.02 % at 356 keV and 3.25±0.01 % at 662 keV. They were assembled into the array with a reflector between pixels, and sealed hermetically by our own technique. The pitch of the LaBr3(Ce) pixels, 6.1 mm, was determined to be the same as that of the anodes. The thickness of pixels was 15 mm to have moderate detection efficiency for sub-MeV/MeV gamma rays. We evaluated the performance as follows. At first, in order to remove the effect of the gain variance among anodes of the MAPMT, the array was coupled to a single-anode PMT, and collimated gamma rays from isotopes were irradiated to one pixel in the array. The energy resolutions (FWHM) were 5.4 (average) ±1.0 (RMS) % at 356 keV and 4.5±1.0 % at 662 keV. Next, in order to obtain a gamma-ray image of 64 pixels by readout of only four channels, we used a resistor-chain readout system in the charge division method. In flood field irradiation of gamma rays, each pixel was clearly resolved. The energy resolutions (FWHM) of 64 pixels were 8.6±1.0 % at 356 keV and 5.8±0.9 % at 662 keV. The averages were represented by (5.8±0.7) (E/662 keV)-0.52±0.02 % at energies from 122 keV to 835 keV.

本文言語English
ホスト出版物のタイトル2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
ページ4569-4573
ページ数5
DOI
出版ステータスPublished - 2007
外部発表はい
イベント2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC - Honolulu, HI, United States
継続期間: 2007 10 272007 11 3

出版物シリーズ

名前IEEE Nuclear Science Symposium Conference Record
6
ISSN(印刷版)1095-7863

Other

Other2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
国/地域United States
CityHonolulu, HI
Period07/10/2707/11/3

ASJC Scopus subject areas

  • 放射線
  • 核物理学および高エネルギー物理学
  • 放射線学、核医学およびイメージング

フィンガープリント

「Development of a gamma camera based on an 8×8 array of LaBr <sub>3</sub>(Ce) scintillator pixels coupled to a 64-channel multi-anode PMT」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル