Study of two-layer tapered depth of interaction PET detector

Behnamian, H ; Sharif University of Technology | 2021

204 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.apradiso.2021.109731
  3. Publisher: Elsevier Ltd , 2021
  4. Abstract:
  5. 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. © 2021 Elsevier Ltd
  6. Keywords:
  7. Geometry ; Health care ; Image resolution ; Medical imaging ; Scanning ; Depth of interaction ; Depth of interactions ; Detector geometry ; PET detector for small animal imaging ; PET scanner ; Small animal PET scanners ; Spatial resolution ; Tapered detectors ; Two-layer ; Two-layer tapered crystal ; Animals ; Crystal layer ; Equipment design ; Image quality ; Physical parameters ; Physical phenomena ; Priority journal ; Sensitivity ; Signal noise ratio ; Simulation ; Tapered detector geometry
  8. Source: Applied Radiation and Isotopes ; Volume 174 , 2021 ; 09698043 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S096980432100138X