J-PET Framework: Software platform for PET tomography data reconstruction and analysis

Krzemień, W.; Gajos, A.; Kacprzak, K.; Rakoczy, K.; Korcyl, G.

doi:10.1016/j.softx.2020.100487

Cited by 27 publications

(26 citation statements)

References 38 publications

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“…For the data processing and simulations a dedicated software framework was developed [17][18][19]. The hit-position and hit-time are reconstructed by the dedicated reconstruction methods based on the compressing sensing theory and the library of synchronized model signals [13,[20][21][22].…”

Section: Pos(eps-hep2021)697mentioning

confidence: 99%

Physics Beyond the Standard Model with the J-PET detector

Río¹

2022

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)

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The Positronium (Ps) system, a bound state of an electron and a positron, is suitable for testing the predictions of quantum electrodynamics (QED), since its properties can be perturbatively calculated to high accuracy and, unlike the hydrogen system, is not affected by finite size or QCD effects at the current experimental precision level. This makes the Ps atom a good laboratory to test the Fundamental Symmetries of Physics and also search for new particles not included in the Standard Model (SM) of physics. On one hand, time reversal (T) and CP symmetry violation have never been observed in pure leptonic systems like the Ps atom, and the current experimental limits for CP and CPT violation in the decays of Ps is currently set at the level of 10 −3 , while for C violation are at the level of 10 −7 . These limits are still six and two orders of magnitude lower than the expected precision of 10 −9 set by photon-photon interactions. Secondly, experiments searching for invisible decays of the Ps triplet state, the ortho-Positronium (o-Ps), which mainly decays to three photons, are being conducted, since they are sensitive to new physics scenarios, e.g. Mirror Matter (MM), a suitable Dark Matter candidate, proposed to restore parity (P) violation. By performing a high precision measurement of the o-Ps lifetime, the accuracy of the present QED calculations can be tested and a search for the invisible decays of the o-Ps can be performed. These studies are conducted with the novel total-body Positron-Electron Tomograph (PET) scanner at the Jagiellonian University. The J-PET is a large and high precise medical imaging tool, based on the plastic scintillators. It is a high acceptance multi-purpose detector optimized for the detection of photons from positron-electron annihilation and can be used in a broad scope of interdisciplinary investigation, e.g. medical imaging, life-time measurements, quantum entanglement studies with o-Ps, and tests of discrete symmetries.

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Section: Pos(eps-hep2021)697mentioning

confidence: 99%

Physics Beyond the Standard Model with the J-PET detector

Río¹

2022

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)

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“…The signals are probed in the voltage domain with the accuracy of about 30 ps by a dedicated, fully digital front-end electronics and the data are collected by the trigger-less and re-configurable data acquisition system [19,20]. A dedicated software framework was developed for the data processing and simulations [21]. The hit-position and hit-time are reconstructed by the reconstruction methods based on the compressing sensing theory and the library of synchronized model signals [18,22,23].…”

Section: The J-pet Detector Setupmentioning

confidence: 99%

Test of discrete symmetries with J-PET

Krzemień¹

2022

Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)

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Search for possible violation of combined charge, parity, and time-reversal symmetries is yet another approach for a test of New Physics. Positronium being a bound state of electron and positron, is the lightest matter-antimatter system and at the same time eingenstate of the C and P operators, which makes it a unique probe in such endeavour. The experimental method consists of the measurement of angular correlations constructed based on the momenta and/or polarization of photons originating from the positronium annihilation, and the positronium spin orientation. The J-PET detector is the only device which enables determination of polarization of photons from positronium annihilation together with estimation of positronium spin axis on the event-by-event basis. This allows exploration of a new class of discrete symmetry-odd operators that has not been investigated before. With first measurements demonstrating such capabilities, we are able to reach the precision of CP and CPT tests at permill level. In this contribution we describe experimental techniques and new results of discrete symmetry tests in the decays of positronium.

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“…The scope of applications of the detector ranging from medical imaging development to fundamental studies of positronium annihilations (including modes not observed to date such as ortho-positronium (o-Ps) annihilation into 4γ [3]) requires the DAQ system to impose a minimal bias on the spectrum of recorded events [36]. This is achieved with recording of data in a trigger-less mode [32,37] followed by filtering and reconstruction with a dedicated analysis software framework [38][39][40]. While an unusual choice due to large resulting data volume, in the case of searches for small effects such as rare decays and symmetry violations which can be easily mimicked by a non-uniform response of the detector and DAQ elements such as trigger bias imposed on the data, only complete foregoing of the trigger allows for full control over systematic effects in the experiments.…”

Section: The J-pet Detectormentioning

confidence: 99%

Sensitivity of Discrete Symmetry Tests in the Positronium System with the J-PET Detector

Gajos

2020

Symmetry

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Study of certain angular correlations in the three-photon annihilations of the triplet state of positronium, the electron–positron bound state, may be used as a probe of potential CP and CPT-violating effects in the leptonic sector. We present the perspectives of CP and CPT tests using this process recorded with a novel detection system for photons in the positron annihilation energy range, the Jagiellonian Positron Emission Tomography (J-PET). We demonstrate the capability of this system to register three-photon annihilations with an unprecedented range of kinematical configurations and to measure the CPT-odd correlation between positronium spin and annihilation plane orientation with a precision improved by at least an order of magnitude with respect to present results. We also discuss the means to control and reduce detector asymmetries in order to allow J-PET to set the first measurement of the correlation between positronium spin and momentum of the most energetic annihilation photon which has never been studied to date.

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J-PET Framework: Software platform for PET tomography data reconstruction and analysis

Cited by 27 publications

References 38 publications

Physics Beyond the Standard Model with the J-PET detector

Physics Beyond the Standard Model with the J-PET detector

Test of discrete symmetries with J-PET

Sensitivity of Discrete Symmetry Tests in the Positronium System with the J-PET Detector

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