Compact high resolution detector for small animal SPECT

被引：0
|
作者：
Schramm, N [1 ]
Wirrwar, A [1 ]
Sonnenberg, F [1 ]
Halling, H [1 ]
机构：
[1] FZ Julich, Zent Lab Elektr, D-52428 Julich, Germany
来源：
1999 IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD, VOLS 1-3 | 1999年
关键词：
D O I：
暂无
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 (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 8.5%. The system resolution is 1.8mm FWHM close to the collimator and 2.5mm at 30mm source distance with a system sensitivity of 8.5cps/MBq. Using an iterative reconstruction algorithm the tomographical resolution (in water) amounts to 2.7mm. When using a pinhole collimator (1.2mm aperture) the system resolution at 30mm improves to 1.4mm and the sensitivity increases by a factor of 3.3.
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页码：1479 / 1482
页数：4
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