Program Information
Characterization of a Scintillating Radiation Detector for Emission Tomography Imaging Utilizing a Compact Acquisition System That Improves Affordability
J Dominguez Kondo*, E Moreno Barbosa , B Alonso , Benemerita Universidad Autonoma de Puebla, Puebla, Puebla
Presentations
TU-L-GePD-IT-1 (Tuesday, August 1, 2017) 1:15 PM - 1:45 PM Room: Imaging ePoster Theater
Purpose: To characterize a compact data acquisition system (CDA) with applications in emission tomography in terms of: homogeneity response maps and energy spectra.
Methods: Two experimental setups were compared. The novel consisted of a crystal detector with an array of 20 x 20 LYSO:Ce scintillator crystals attached to a position-sensitive multianode photomultiplier tube. A resistive chain encoded the signals of the tube. The four output signals were digitalized by the CDA and processed with an in-house programmed python script. The CDA (10 x 6 x 2 cm3) was a commercial compact FPGA platform (RedPitaya ®) with a bandwidth of 50 MHz, mainly used for teaching purposes. The CDA was programmed to acquire data at 120 samples per second from each channel of the resistive chain separately. Homogeneity maps and energy spectra of the detector system in presence and absence of a 137Cs source were acquired for comparison purposes. These data were compared to results obtained with a regular laboratory system composed of: a 200 MHz oscilloscope and an external power supply. This system was controlled and data were analyzed using LabVIEW applications (National Instruments ®).
Results: We obtained the response maps and energy spectra when 137Cs was not present and when it was.
Conclusion: The CDA system resulted in a more compact and affordable DAQ system to retrieve homogeneity response maps for emission tomography in real time.
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