NDLI: Analog processing board for the MiCES small animal PET scanner

Content Provider	IEEE Xplore Digital Library
Author	Park, B. Lewellen, T.K. Miyaoka, R.S. Janes, M. Kinahan, P.
Copyright Year	2004
Description	Author affiliation: Univ. of Washington Med. Center, Seattle, WA, USA (Park, B.; Lewellen, T.K.; Miyaoka, R.S.; Janes, M.; Kinahan, P.)
Abstract	The analog signal summing board for the micro crystal element scanner (MiCES) small animal positron emission tomograph is described. The MiCES scanner uses a detector module with a position sensitive photomultiplier tube (PSPMT) providing 12 output signals. To reduce the number of electronic channels, the signals are summed to produce four output signals (X+, X-, Y+, Y-). Our current analog summing board uses a simple resistor network to provide weighting of the summed input signals. A weakness of this implementation is the decoding performance of crystals near the edges of the PSPMT. Because the MiCES scanner incorporates a very compact crystal array (22/spl times/22 crystals, each 0.8/spl times/0.8/spl times/10mm), that uses all of the PSPMT photocathode, improving the edge decoding is an important goal. The analog summing board described in this paper uses a threshold amplifier, weighted resistor network, and a low voltage differential signal (LVDS) converter. Thresholds are set on each of the 12 PSPMT signals to block those signals that inject more noise than information into the summing network. The result is an improvement in edge decoding. Output signals are converted to LVDS levels to minimize noise during signal transfer to the system analog processing boards.
Starting Page	3920
Ending Page	3923
File Size	1962149
Page Count	4
File Format	PDF
ISBN	0780387007
ISSN	10823654
e-ISBN	0780387015
DOI	10.1109/NSSMIC.2004.1466735
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-10-16
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Mice Animals Positron emission tomography Decoding Resistors Crystals Signal processing Radioactive decay Position sensitive particle detectors Photomultipliers
Content Type	Text
Resource Type	Article

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