Improvement of time resolution in a TOF PET system with the use of BaF2 crystals |
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| Affiliation: | 1. Oak Ridge National Laboratory, 1 Bethel Valley Rd., Oak Ridge, TN 37831, USA;2. Department of Nuclear Engineering and Radiological Sciences, University of Michigan, 1906 Cooley Bldg., 2355 Bonisteel Blvd., Ann Arbor, MI 48109, USA;1. Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Cracow, Poland;2. Department of Nuclear Methods, Institute of Physics, Maria Curie-Sklodowska University, 20-031 Lublin, Poland;3. Świerk Computing Centre, National Centre for Nuclear Research, 05-400 Otwock-Świerk, Poland;4. High Energy Department, National Centre for Nuclear Research, 05-400 Otwock-Świerk, Poland;1. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Mengxi Road 2, Zhenjiang, Jiangsu Province, 212003, China;2. Yangzijiang Shipbuilding (Holdings) Ltd, 1# Lianyi Road, Jiangyin-Jingjiang Industry Zone, Jingjiang, Jiangsu Province, 214532, China |
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| Abstract: | In the course of the construction of a new type of time-of-flight positron emission tomograph (TOF PET), the time resolution of a system with BaF2 crystals has been tested. It was found that low-viscosity silicon oil is one of the best optical coupling media between the BaF2 crystal and the photomultiplier tube, and that the time resolution is less sensitive to the geometry between the detector and the source position. The dependence of the time resolution on the size of the BaF2 crystal has been determined as well. Absorption and attenuation of photons in the detector system are expected to be of particular importance for the better performance of the TOF PET. |
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