Editorial:
IOP Publishing on behalf of the Institute of Physics and Engineering in Medicine
Fecha de edición:
2012-10
Cita:
Physics in Medicine and Biology, (2012), 57(22), 7493-7518
ISSN:
0031-9155 (Print) 1361-6560 (Online)
DOI:
10.1088/0031-9155/57/22/7493
Agradecimientos:
This work was partially funded by the AMIT project (CEN-20101014) from the CDTICENIT program, RECAVA-RETIC Network (RD09/0077/00087), projects TEC2010-21619-C04-01 and TEC2011-28972-C02-01 from the Spanish Ministerio de Ciencia e Innovación, PRECISION grant IPT-300000-2010-3, CPAN (CSD-2007-00042@Ingenio2010), MEC (FPA2010-17142) and ARTEMIS program (S2009/DPI-1802) from the Spanish Comunidad de Madrid and EU-ERDF program.
Technological advances have improved the assembly process of PET detectors, resulting in quite small mechanical tolerances. However, in high-spatialresolution systems, even submillimetric misalignments of the detectors may lead to a notable degradation of imagTechnological advances have improved the assembly process of PET detectors, resulting in quite small mechanical tolerances. However, in high-spatialresolution systems, even submillimetric misalignments of the detectors may lead to a notable degradation of image resolution and artifacts. Therefore, the exact characterization of misalignments is critical for optimum reconstruction quality in such systems. This subject has been widely studied for CT and SPECT scanners based on cone beam geometry, but this is not the case for PET tomographs based on rotating planar detectors. The purpose of this work is to analyze misalignment effects in these systems and to propose a robust and easy-to-implement protocol for geometric characterization. The result of the proposed calibration method, which requires no more than a simple calibration phantom, can then be used to generate a correct 3D-sinogram from the acquired list mode data.[+][-]
