| Autor: |
Konrad Lankes, Albert Aguilar, Antonio González, C. Correcher, Sven Junge, Andrea Gonzalez-Montoro, Jose M. Benlloch, Pablo Conde, Cesar Molinos |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC). |
| Popis: |
This works shows the feasibility study performed with a new small animal PET design based on SiPM arrays in front of a high field MR scanner. The PET ring is made out of 8 detector blocks each containing a single monolithic 50×50×10 mm3 LYSO block and coupled to an array of 12×12 SiPMs. The PET system performance has been evaluated both alone and in front of the MR with about 400–500 mT magnetic field. We evaluated two important parameters such as the energy and the spatial resolution. We did not observe, on overage, any energy resolution degradation when the system was inside the residual magnetic field. A slight shift to lower energies of about 7 keV on average was determined. The use of monolithic blocks and the high readout granularity has allowed us to explore novel approaches to precisely determine the 511 keV photon depth of interaction (DOIs). An accurate DOI resolution permitted to efficiently correct the parallax error for all events within the FOV, even those near the edges, resulting on a homogenous spatial resolution across the entire FOV. The spatial resolution performance did not degrade in the presence of the residual magnetic field. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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