Development of a large-area monolithic 4 x 4 MPPC array for a future PET scanner employing pixelized Ce:LYSO and Pr:LuAG crystals

被引：32

作者：

Kato, T. ^{[1
]}

Kataoka, J. ^{[1
]}

Nakamori, T. ^{[1
]}

Miura, T. ^{[1
]}

Matsuda, H. ^{[1
]}

Sato, K. ^{[2
]}

Ishikawa, Y. ^{[2
]}

Yamamura, K. ^{[2
]}

Kawabata, N. ^{[2
]}

Ikeda, H. ^{[3
]}

Sato, G. ^{[3
]}

Kamada, K. ^{[4
]}

机构：

[1] Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, Tokyo, Japan

[2] Hamamatsu Photon KK, Div Solid State, Shizuoka, Japan

[3] ISAS JAXA, Chuo Ku, Sagamihara, Kanagawa, Japan

[4] Furukawa Co Ltd, Mat Res Lab, Tsukuba, Ibaraki 3050856, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2011年 / 638卷 / 01期

关键词：

Multi-Pixel Photon Counter; Gamma-rays; Positron emission tomography; PHOTON COUNTERS; APD;

D O I：

10.1016/j.nima.2011.02.049

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We have developed a new type of large-area monolithic Multi-Pixel Photon Counter (MPPC) array consisting of a 4 x 4 matrix of 3 x 3 mm(2) pixels. Each pixel comprises 3600 Geiger mode avalanche photodiodes (APDs) that achieve an average gain of 9.68 x 10(5) at 71.9 V at 0 degrees C with variations of only +/- 7.2% over 4 x 4 pixels. Excellent uniformity was also obtained for photon detection efficiencies (PDE) of +/- 6.4%, whilst dark count rates at the single photoelectron (1 p.e.) level amounted to similar or equal to 2 Mcps/pixel, measured at 0 degrees C. As the first step toward using the device in scintillation photon detectors, we fabricated a prototype gamma-ray camera consisting of an MPPC array optically coupled with a scintillator matrix, namely a 4 x 4 array of 3 x 3 x 10 mm(3) crystals. Specifically, we tested the performance with Ce-doped (Lu, Y)(2)(SiO4)O (Ce:LYSO), Pr-doped Lu3Al5O12 (Pr:LuAG) and "surface coated" Pr:LuAG (Pr:LuAG (WES)) matrices whereby the emission peak of Pr:LuAG was shifted from 310 to 420 nm via a wavelength shifter (WLS). Average energy resolutions of 13.83%, 14.70% and 13.96% (FWHM) were obtained for 662 keV gamma-rays, as measured at 0 degrees C with Ce:LYSO, Pr:LuAG and Pr:LuAG (WLS) scintillator matrices, respectively. We confirmed that the effective PDE for Pr:LuAG (WLS) had improved by more than 30% compared to original, non-coated Pr:LuAG matrix. These results suggest that a large-area monolithic MPPC array developed here could be promising for future medical imaging, particularly in positron emission tomography (PET). (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：83 / 91

页数：9

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