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November 8, 2005 JLAB Awake Animal Project
New Instrumentation for JLAB Awake Animal Project
• Smaller Pixel Size requires higher granularity in PMT (2.4 – 1.2 mm)
• Higher granularity requires more anodes• More anodes require more resistive network
and/or more acquisition channels• Need optimal readout electronics and data
acquisition system
November 8, 2005 JLAB Awake Animal Project
Two Options for Readout Electronics of 10 cm X 20 cm Gamma-Camera
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Resistive Network Resistive Network with 4 Output with 4 Output Channels per Channels per
ModuleModule
4 Output Channels 4 Output Channels X 8 Modules = 32 X 8 Modules = 32
Channels TotalChannels Total
8 Rows and 8 8 Rows and 8 Columns with 16 Columns with 16 Output ChannelsOutput Channels
32 Output 32 Output Channels X 2 Channels X 2 Modules = 64 Modules = 64 Channels totalChannels total
Each Module Each Module Read Out Read Out SeparatelySeparately
2x2 Modules 2x2 Modules Read Out in Read Out in SeriesSeries
Type IType I Type IIType II
November 8, 2005 JLAB Awake Animal Project
Raw Image showing four Hamamatsu 8500 tubes (each tube 5 cm square)
Raw Image Summed in Y-Dimenision Showing High-Contrast and Spatial Uniformity
10 cm X 10 cm Gamma-Camera Built for Deutsches Krebsforschungszentrum
(German Cancer Research Center)
Gamma Camera Components
November 8, 2005 JLAB Awake Animal Project
Dual Modality Gamma/Optical Imager Deutsches Krebsforschungszentrum
(German Cancer Research Center)
Gamma/Optical System on Tomographic Gantry
Tc-99m MDP Bone ScanPlanar, Pinhole Collimator
November 8, 2005 JLAB Awake Animal Project
New 10 cm X 20 cm Gamma-Camera for John Hopkins University Awake Animal Imager
Composed of Two Modules Like the 10 cm X 10 cm Gamma-Camera Made for the Deutsches
Krebsforschungszentrum
November 8, 2005 JLAB Awake Animal Project
New 10 cm X 20 cm Gamma-Camera for John Hopkins University Awake Animal Imager
Image Showing Two Modules of 4 Tubes
Close-Up of Central Region Showing Pixel Resolution in Crack Between Tubes of Different Modules
Module 2Module 2
Module 1Module 1
November 8, 2005 JLAB Awake Animal Project
Resistive Network with Four Readout Channels
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R1 R2 R3 R31 R32
R1' R2' R3' R31' R32'
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1.2 mm step CsI(Tl) crystal with 22Na source
Resistive Network used to read out 1024 channels of
Burle 85021 PMT using four readout channels Lineout of Image Showing
High-Contrast Pixel Separation
November 8, 2005 JLAB Awake Animal Project
Readout Data Acquisition System
• PCI Based System– Two 16 channel Datel PCI416 cards in the current two
detector / 16 channel per detector system
– Two 32 Channel Datel PCI417 needed for next 64 channel detector (type 2)
– One 32 Channel Datel PCI417 needed for next 32 channel detector (type 1)
• VME Based System– Capable of modules of 64 channels
• USB Based System– Capable of modules of 128 channels
