Study of two-layer tapered depth of interaction PET detector
Behnamian H. Yousefnejad S. Shafiee M. Rafiei A.
August 2021Elsevier Ltd
Applied Radiation and Isotopes
2021#174
Improving detection efficiency in small animal PET scanners without degrading spatial resolution is one of the main problems of these scanners. Commercial small animal PET scanners use different methods to achieve desirable levels of sensitivity and spatial resolution. GE Healthcare eXplore VISTA PET scanner uses double layer (LYSO-GSO) depth-of-interaction (DOI) capable cuboid detector modules. In this work, the design of GE Healthcare eXplore VISTA PET scanner is improved using tapered detector geometry instead of cuboid geometry. Using tapered detector geometry, the gaps between adjacent modules are filled and the sensitive volume has increased about 11.5%. The new designed PET scanner sensitivity and spatial resolution are studied for different crystal layer configurations (LYSO-GSO and GSO-LYSO with different thicknesses). As expected, average sensitivity over FOV is improved. Spatial resolution is slightly degraded but it is still uniform over FOV.
Depth of interaction (DOI) , PET detector For small animal imaging , Two-layer tapered crystal
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Department of Physics, University of Guelph, 50 Stone Road East, Guelph, ON, Canada
Iranian Light Source Facility, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran
Energetic Cosmos Laboratory, Nazarbayev University, Astana, Kazakhstan
Department of Energy Engineering, Sharif University of Technology, Tehran, Iran
Department of Physics
Iranian Light Source Facility
Energetic Cosmos Laboratory
Department of Energy Engineering
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