By Topic

Development of a gamma camera based on an 8×8 array of LaBr3(Ce) scintillator pixels coupled to a 64-channel multi-anode PMT

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

15 Author(s)
H. Kubo ; Department of Physics, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwake, Sakyo-ku, 606-8502, Japan ; K. Hattori ; C. Ida ; S. Iwaki
more authors

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 8times8 array of LaBr3(Ce) pixels with a size of 5.8times5.8times15 mm3 and a 64-channel MAPMT (Hamamatsu flat-panel H8500) with an effective area of 49times49 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 4.33plusmn0.02% at 356 keV and 3.25plusmn0.01% 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) plusmn1.0 (RMS) % at 356 keV and 4.5plusmn1.0 % 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 8.6plusmn1.0% at 356 keV and 5.8plusmn0.9 % at 662 keV. The averages were represented by (5.8plusmn0.7) (E/662 keV)-052 plusmn 0.02 % at energies from 122 keV to 835 keV.

Published in:

2007 IEEE Nuclear Science Symposium Conference Record  (Volume:6 )

Date of Conference:

Oct. 26 2007-Nov. 3 2007