Dynode-timing method for PET block detectors

被引:1
|
作者
Bauer, Florian [1 ,2 ]
Zhang, Nan [2 ]
Schmand, Matthias [2 ]
Loope, Michael [2 ]
Eriksson, Lars [1 ,2 ]
Aykac, Mehmet [2 ]
机构
[1] Univ Stockholm, Dept Phys, SE-10691 Stockholm, Sweden
[2] Siemens Med Sol, Mol Imaging, Knoxville, TN 37932 USA
关键词
detectors; dynode-timing; high resolution; positron emission tomography (PET); small animal; SPECT;
D O I
10.1109/TNS.2007.910879
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
The focus of this paper is the investigation of a new dynode-timing technique optimized for PET block detectors. This method allows utilization of dynode signals from single but especially multiple photo-multiplier tubes (PMTs), operated with negative high-voltage. The technique will provide an event-timing trigger without deteriorating the anode signal. A printed circuit board has been developed and built for this investigation. Benchmark measurements have been performed, comparing timing of the anode signal with timing of the inverted last-dynode signal and timing of the dynode signal extracted via a newly developed LVPECL-logic based board. Timing measurements were performed with plastic as well as LSO scintillators. From single PMT measurements we find a 30 ps improvement with the dynode-timing method compared to the standard anode timing with two Photonis XP2020Q PMTs with LSO (10 mm x 10 mm x 10 ram). For a quad-PMT block detector, assembled of four Hamamatsu R9800 with a Hi-Rez block, the timing-resolution improves similar to 10%, by 43 ps compared to the standard anode timing.
引用
收藏
页码:451 / 456
页数:6
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