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Evaluation of STIR Library Adapted for PET Scanners with Non-Cylindrical Geometry

Dao, Viet; Mikhaylova, Ekaterina; Ahnen, Max L; Fischer, Jannis; Thielemans, Kris; Tsoumpas, Charalampos; (2022) Evaluation of STIR Library Adapted for PET Scanners with Non-Cylindrical Geometry. Journal of Imaging , 8 (6) , Article 172. 10.3390/jimaging8060172. Green open access

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Abstract

Software for Tomographic Image Reconstruction (STIR) is an open source C++ library used to reconstruct single photon emission tomography and positron emission tomography (PET) data. STIR has an experimental scanner geometry modelling feature to accurately model detector placement. In this study, we test and improve this new feature using several types of data: Monte Carlo simulations and measured phantom data acquired from a dedicated brain PET prototype scanner. The results show that the new geometry class applied to non-cylindrical PET scanners improved spatial resolution, uniformity, and image contrast. These are directly observed in the reconstructions of small features in the test quality phantom. Overall, we conclude that the revised “BlocksOnCylindrical” class will be a valuable addition to the next STIR software release with adjustments of existing features (Single Scatter Simulation, forward projection, attenuation corrections) to “BlocksOnCylindrical”.

Type: Article
Title: Evaluation of STIR Library Adapted for PET Scanners with Non-Cylindrical Geometry
Open access status: An open access version is available from UCL Discovery
DOI: 10.3390/jimaging8060172
Publisher version: https://doi.org/10.3390/jimaging8060172
Language: English
Additional information: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Keywords: tomography; image reconstruction; brain; imaging
UCL classification: UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Medicine > Department of Imaging
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Medicine
URI: https://discovery.ucl.ac.uk/id/eprint/10150958
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