Development of a gamma camera based on an 8×8 array of LaBr3(Ce) scintillator pixels coupled to a 64-channel multi-anode PMT
Development of a gamma camera based on an 8×8 array of LaBr3(Ce) scintillator pixels coupled to a 64-channel multi-anode PMT
复制标题
开发基于与 64 通道多阳极 PMT 耦合的 8×8 LaBr3(Ce) 闪烁体像素阵列的伽马相机
DOI：
10.1109/nssmic.2007.4437127
复制
发表时间：
2007
期刊：
影响因子：
--
通讯作者：
K. Ueno
中科院分区：
文献类型：
--
作者：
H. Kubo;K. Hattori;C. Ida;S. Iwaki;S. Kabuki;Shunsuke Kurosawa;K. Miuchi;T. Nagayoshi;H. Nishimura;Y. Okada;R. Orito;A. Takada;T. Tanimori;K. Tsuchiya;K. Ueno
我们开发了一种基于与多阳极光电倍增管 (MAPMT) 耦合的 LaBr3(Ce) 闪烁体像素阵列的伽马相机。它由尺寸为5.8×5.8×15 mm3的8×8 LaBr3(Ce)像素阵列和有效面积为49×49 mm2的64通道MAPMT（Hamamatsu平板H8500）组成。 LaBr3(Ce)阵列的像素由两个直径为38 mm、高度为38 mm的LaBr3(Ce)单片晶体制成，其能量分辨率在356 keV下为4.33plusmn0.02%，在662 keV下为3.25plusmn0.01%。它们被组装成阵列，像素之间有一个反射器，并通过我们自己的技术密封。 LaBr3(Ce) 像素的间距为 6.1 mm，经确定与阳极的间距相同。像素厚度为15毫米，对亚MeV/MeV伽马射线具有中等的检测效率。我们对性能进行了如下评估。首先，为了消除MAPMT阳极之间增益差异的影响，将阵列耦合到单阳极PMT，并将来自同位素的准直伽马射线照射到阵列中的一个像素。能量分辨率 (FWHM) 在 356 keV 处为 5.4（平均）plusmn1.0 (RMS)%，在 662 keV 处为 4.5plusmn1.0%。接下来，为了仅通过四个通道的读出来获得64像素的伽马射线图像，我们在电荷分割方法中使用了电阻链读出系统。在伽马射线的泛场照射下，每个像素都清晰可见。 64个像素的能量分辨率（FWHM）在356 keV处为8.6plusmn1.0%，在662 keV处为5.8plusmn0.9%。能量从 122 keV 到 835 keV 时，平均值由 (5.8plusmn0.7) (E/662 keV)-052 plusmn 0.02 % 表示。
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.
带 CsI (TI) 闪烁体阵列的平板多阳极 PMT 不同前端系统性能研究
DOI：
--
发表时间：
2006
期刊：
Nuclear Instruments and Methods A (In press)
影响因子：
--
作者：
H.Sekiya;et al.
通讯作者：
et al.
康普顿伽马射线相机使用气态 TPC 和 GSO(Ce)-LaBr3(Ce) 闪烁体像素阵列
DOI：
--
发表时间：
2009
期刊：
影响因子：
--
作者：
Suzuki;D.;et al.;楯 辰哉;S.Kurosawa
通讯作者：
S.Kurosawa
开发基于气态 TPC 的电子跟踪康普顿相机和闪烁相机
DOI：
--
发表时间：
2008
期刊：
影响因子：
--
作者：
Kazuki Ueno;et al.
通讯作者：
et al.