NDLI: An 1152 channel singles list-mode data acquisition system for MADPET-II

Content Provider	IEEE Xplore Digital Library
Author	McElroy, D.P. Hoose, M. Pimpl, W. Schuler, T. Ziegler, S.I.
Copyright Year	2004
Description	Author affiliation: Tech. Univ. Munchen, Germany (McElroy, D.P.; Hoose, M.)
Abstract	A data acquisition system has been developed to read out signals from the MADPET-II small animal LSO-AFD PET scanner. The scanner consists of 36 independent detector modules arranged in a dual-radial layer ring (/spl Phi/ 71 mm). Each module contains a 4/spl times/8 array of optically isolated, 2/spl times/2 mm LSO crystals, coupled one-to-one to a 32 channel APD. To take full advantage of the detector geometry, signals from each crystal are individually processed without any data reduction. This is realised using custom designed mixed-signal ASICs for analogue signal processing, and KPGAs to control the digitisation of analogue signals and subsequent multiplexing. A DCs digitise the signal peak height, TDCs time stamp each event relative to a system clock, and two 32 bit words containing the energy, time and position information for each event are multiplexed through three FIFO stages before being written to disk via gigabit Ethernet. Even' singles event is processed and stored in list mode format, and coincidences are sorted post-acquisition in software. A 128-channel prototype system is currently in operation. System pulse height linearity and count rate performance were measured by supplying test inputs to the pre-amplifier. All channels responded linearly with R/sup 2/>0.9988 over a 6:1 input dynamic range, and input pulses were transmitted to disk with 0% data loss up to 45,000 cps/channel. The timing resolution of the TDC was measured to be 1 ns FWHM.
Starting Page	2370
Ending Page	2373
File Size	966985
Page Count	4
File Format	PDF
ISBN	0780387007
ISSN	10823654
e-ISBN	0780387015
DOI	10.1109/NSSMIC.2004.1462733
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	Data acquisition Detectors Optical arrays Optical signal processing Signal processing Pulse measurements Animals Positron emission tomography Crystals Optical coupling
Content Type	Text
Resource Type	Article

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