Compact high resolution detector for small animal SPECT

被引：77
|
作者：
Schramm, N
Wirrwar, A
Sonnenberg, F
Halling, H
机构：
[1] Forschungszentrum Julich, Zent Lab Elektron, D-52425 Julich, Germany
[2] Univ Dusseldorf, Nukl Med Klin, D-40225 Dusseldorf, Germany
来源：
IEEE TRANSACTIONS ON NUCLEAR SCIENCE | 2000年 / 47卷 / 03期
关键词：
D O I：
10.1109/23.856564
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We present a high-resolution detector for small animal SPECT and the scintigraphic examination of human extremities or scintimammography. The system consists of a 2mm NaI(Tl) disk coupled to a 5 " position sensitive photomultiplier (Hamamatsu, R3292) and an ultra high-resolution, parallel-hole collimator. The usable FOV of this detector has a diameter of 90mm. The intrinsic spatial resolution is 1.4mm FWHM and the energy resolution at 140keV amounts to 8.7%. The system resolution is 1.8mm FWHM close to the collimator and 2.5mm at 30mm source distance with a system sensitivity of 8.8cps/MBq. Using an iterative reconstruction algorithm the tomographical resolution (in water) amounts to 2.7mm. When using a pinhole collimator (1.1mm aperture) the system resolution at 30mm improves to 1.4mm and the sensitivity increases by a factor of 3.2 to an absolute value of 27.9cps/MBq.
引用
收藏
页码：1163 / 1167
页数：5
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