TY - GEN
T1 - A flexible AdvancedTCA based sampling ADC system for multimodality positron emission tomography
AU - Mann, Alexander B.
AU - Konorov, Igor
AU - Paul, Stephan
AU - Spanoudaki, Virginia C.
AU - Ziegler, Sibylle I.
PY - 2007
Y1 - 2007
N2 - Multimodality imaging allows to combine the advantages of different imaging techniques within nuclear medicine. The combination of positron emission tomography (PET) and magnetic resonance Imaging (MRI) has also to ensure that both modalities do not interfere with each other. The PET data acquisition system (DAQ) has to handle in particular the strong RF signals which occur during MR operation. Therefore, a DAQ system based on sampling ADCs and field programmable gate arrays (FPGAs) for online data processing is presented. The changeable FPGA firmware implements special trigger and noise suppression algorithms which allow the operation of silicon photomultipller based PET detectors inside a MR system without additional shielding. In a second step, the FPGAs determine also the precise time information for each detected photon event from the pulse form data. The basic building block is an easy exchangeable mezzanine card with a size of 70 mm × 130 mm, which includes up to 32 ADC channels with 70 MHz sampling rate at 12 bit. To integrate the required amount of ADC channels for a complete PET system, four mezzanine cards are combined on an AdvancedTCA (ATCA) carrier module, which equals 128 ADC channels. A complete AdvancedTCA crate can then house up to 1536 analog channels. The resolution of the time reconstruction algorithm was verified with coincidence measurements. Additionally, data was acquired inside a running MR tomograph, to test the behavior of the trigger algorithms.
AB - Multimodality imaging allows to combine the advantages of different imaging techniques within nuclear medicine. The combination of positron emission tomography (PET) and magnetic resonance Imaging (MRI) has also to ensure that both modalities do not interfere with each other. The PET data acquisition system (DAQ) has to handle in particular the strong RF signals which occur during MR operation. Therefore, a DAQ system based on sampling ADCs and field programmable gate arrays (FPGAs) for online data processing is presented. The changeable FPGA firmware implements special trigger and noise suppression algorithms which allow the operation of silicon photomultipller based PET detectors inside a MR system without additional shielding. In a second step, the FPGAs determine also the precise time information for each detected photon event from the pulse form data. The basic building block is an easy exchangeable mezzanine card with a size of 70 mm × 130 mm, which includes up to 32 ADC channels with 70 MHz sampling rate at 12 bit. To integrate the required amount of ADC channels for a complete PET system, four mezzanine cards are combined on an AdvancedTCA (ATCA) carrier module, which equals 128 ADC channels. A complete AdvancedTCA crate can then house up to 1536 analog channels. The resolution of the time reconstruction algorithm was verified with coincidence measurements. Additionally, data was acquired inside a running MR tomograph, to test the behavior of the trigger algorithms.
UR - https://www.scopus.com/pages/publications/48349130198
U2 - 10.1109/NSSMIC.2007.4436494
DO - 10.1109/NSSMIC.2007.4436494
M3 - Conference contribution
AN - SCOPUS:48349130198
SN - 1424409233
SN - 9781424409235
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 1729
EP - 1732
BT - 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
T2 - 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
Y2 - 27 October 2007 through 3 November 2007
ER -