{"paper":{"title":"Towards 2+1 photon tomography: Energy-based selection of two 511 keV photons and a prompt photon with the J-PET scanner","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ins-det"],"primary_cat":"physics.med-ph","authors_text":"A. Gajos, A. Wieczorek, B. G{\\l}owacz, B. Hiesmayr, B. Jasi\\'nska, B. Zgardzi\\'nska, C. Curceanu, D. Kisielewska, E. Czerwi\\'nski, E. Kubicz, G. Korcyl, K. Dulski, K. Klimaszewski, L. Raczy\\'nski, M. Gorgol, M. Mohammed, M. Pa{\\l}ka, M. Pawlik-Nied\\'zwiecka, M. Silarski, M. Skurzok, M. Zieli\\'nski, N.G. Sharma, N. Krawczyk, P. Bia{\\l}as, P. Kowalski, P. Moskal, R. Mase{\\l}ek, R. Shopa, S. Nied\\'zwiecki, S. Sharma, T. Kozik, W. Krzemien, W. Wi\\'slicki, Z. Rudy","submitted_at":"2018-03-02T18:58:00Z","abstract_excerpt":"The possibility to separate signals caused by 511 keV photons created in annihilation of electron-positron pairs and the so-called prompt photons from nuclei de- excitation is investigated. It could potentially be used to improve the quality of reconstructed images in the J-PET scanner in 2+1 photon tomography. Firstly, a research is conducted for several radioisotopes that decay via \\b{eta}+ decay followed by de-excitation of an excited nucleus. Efficiency, purity and false positive rate are calculated for each isotope as a function of energy deposited threshold, with a hypothesis that signal"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.00996","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}