A Positron Emission Tomograph based on LSO-APD modules with a sampling ADC read-out system for a students' advanced laboratory course

Florian R. Schneider, Alexander B. Mann, Igor Konorov, Gaspar Delso, Stephan Paul, Sibylle I. Ziegler

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

A one-day laboratory course on positron emission tomography (PET) for the education of physics students and PhD students in medical physics has been set up. In the course, the physical background and the principles of a PET scanner are introduced. Course attendees set the system in operation, calibrate it using a 22Na point source and reconstruct different source geometries filled with 18F. The PET scanner features an individual channel read-out of 96 lutetium oxyorthosilicate (LSO) scintillator crystals coupled to avalanche photodiodes (APD). The analog data of each APD are digitized by fast sampling analog to digital converters (SADC) and processed within field programmable gate arrays (FPGA) to extract amplitudes and time stamps. All SADCs are continuously sampling with a precise rate of 80MHz, which is synchronous for the whole system. The data is transmitted via USB to a Linux PC, where further processing and the image reconstruction are performed. The course attendees get an insight into detector techniques, modern read-out electronics, data acquisition and PET image reconstruction. In addition, a short introduction to some common software applications used in particle and high energy physics is part of the course. .

Original languageEnglish
Pages (from-to)143-149
Number of pages7
JournalZeitschrift fur Medizinische Physik
Volume22
Issue number2
DOIs
StatePublished - Jun 2012

Keywords

  • Data acquisition
  • Education
  • Laboratory course
  • Positron emission tomography
  • Sampling analog to digital converter
  • Signal processing

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