3
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Barrientos L, Borja-Lloret M, Casaña JV, Dendooven P, García López J, Hueso-González F, Jiménez-Ramos MC, Pérez-Curbelo J, Ros A, Roser J, Senra C, Viegas R, Llosá G. Gamma-ray sources imaging and test-beam results with MACACO III Compton camera. Phys Med 2024; 117:103199. [PMID: 38142615 DOI: 10.1016/j.ejmp.2023.103199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 10/05/2023] [Accepted: 12/19/2023] [Indexed: 12/26/2023] Open
Abstract
Hadron therapy is a radiotherapy modality which offers a precise energy deposition to the tumors and a dose reduction to healthy tissue as compared to conventional methods. However, methods for real-time monitoring are required to ensure that the radiation dose is deposited on the target. The IRIS group of IFIC-Valencia developed a Compton camera prototype for this purpose, intending to image the Prompt Gammas emitted by the tissue during irradiation. The system detectors are composed of Lanthanum (III) bromide scintillator crystals coupled to silicon photomultipliers. After an initial characterization in the laboratory, in order to assess the system capabilities for future experiments in proton therapy centers, different tests were carried out in two facilities: PARTREC (Groningen, The Netherlands) and the CNA cyclotron (Sevilla, Spain). Characterization studies performed at PARTREC indicated that the detectors linearity was improved with respect to the previous version and an energy resolution of 5.2 % FWHM at 511 keV was achieved. Moreover, the imaging capabilities of the system were evaluated with a line source of 68Ge and a point-like source of 241Am-9Be. Images at 4.439 MeV were obtained from irradiation of a graphite target with an 18 MeV proton beam at CNA, to perform a study of the system potential to detect shifts at different intensities. In this sense, the system was able to distinguish 1 mm variations in the target position at different beam current intensities for measurement times of 1800 and 600 s.
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Affiliation(s)
- L Barrientos
- Instituto de Física Corpuscular (IFIC), CSIC-UV, Valencia, Spain.
| | - M Borja-Lloret
- Instituto de Física Corpuscular (IFIC), CSIC-UV, Valencia, Spain
| | - J V Casaña
- Instituto de Física Corpuscular (IFIC), CSIC-UV, Valencia, Spain
| | - P Dendooven
- Particle Therapy Research Center (PARTREC), Department of Radiation Oncology, University Medical Center Groningen, Groningen, The Netherlands
| | - J García López
- Centro Nacional de Aceleradores (Universidad de Sevilla, CSIC and Junta de Andalucía), E-41092 Sevilla, Spain; Departamento de Física Atómica, Molecular y Nuclear, Universidad de Sevilla, Sevilla, Spain
| | - F Hueso-González
- Instituto de Física Corpuscular (IFIC), CSIC-UV, Valencia, Spain
| | - M C Jiménez-Ramos
- Centro Nacional de Aceleradores (Universidad de Sevilla, CSIC and Junta de Andalucía), E-41092 Sevilla, Spain; Departamento de Física Aplicada II, Universidad de Sevilla, 41012 Sevilla, Spain
| | - J Pérez-Curbelo
- Instituto de Física Corpuscular (IFIC), CSIC-UV, Valencia, Spain
| | - A Ros
- Instituto de Física Corpuscular (IFIC), CSIC-UV, Valencia, Spain
| | - J Roser
- Instituto de Física Corpuscular (IFIC), CSIC-UV, Valencia, Spain
| | - C Senra
- Instituto de Física Corpuscular (IFIC), CSIC-UV, Valencia, Spain
| | - R Viegas
- Instituto de Física Corpuscular (IFIC), CSIC-UV, Valencia, Spain
| | - G Llosá
- Instituto de Física Corpuscular (IFIC), CSIC-UV, Valencia, Spain.
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6
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Sharma S, Baran J, Chug N, Curceanu C, Czerwiński E, Dadgar M, Dulski K, Eliyan K, Gajos A, Gupta-Sharma N, Hiesmayr BC, Kacprzak K, Kapłon Ł, Klimaszewski K, Konieczka P, Korcyl G, Kozik T, Krzemień W, Kumar D, Niedźwiecki S, Panek D, Parzych S, Del Rio EP, Raczyński L, Choudhary S, Shopa RY, Skurzok M, Stępień EŁ, Tayefi F, Tayefi K, Wiślicki W, Moskal P. Efficiency determination of J-PET: first plastic scintillators-based PET scanner. EJNMMI Phys 2023; 10:28. [PMID: 37029849 PMCID: PMC10082891 DOI: 10.1186/s40658-023-00546-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 03/22/2023] [Indexed: 04/09/2023] Open
Abstract
BACKGROUND The Jagiellonian Positron Emission Tomograph is the 3-layer prototype of the first scanner based on plastic scintillators, consisting of 192 half-metre-long strips with readouts at both ends. Compared to crystal-based detectors, plastic scintillators are several times cheaper and could be considered as a more economical alternative to crystal scintillators in future PETs. JPET is also a first multi-photon PET prototype. For the development of multi-photon detection, with photon characterized by the continuous energy spectrum, it is important to estimate the efficiency of J-PET as a function of energy deposition. The aim of this work is to determine the registration efficiency of the J-PET tomograph as a function of energy deposition by incident photons and the intrinsic efficiency of the J-PET scanner in detecting photons of different incident energies. In this study, 3-hit events are investigated, where 2-hits are caused by 511 keV photons emitted in [Formula: see text] annihilations, while the third hit is caused by one of the scattered photons. The scattered photon is used to accurately measure the scattering angle and thus the energy deposition. Two hits by a primary and a scattered photon are sufficient to calculate the scattering angle of a photon, while the third hit ensures the precise labeling of the 511 keV photons. RESULTS By comparing experimental and simulated energy distribution spectra, the registration efficiency of the J-PET scanner was determined in the energy deposition range of 70-270 keV, where it varies between 20 and 100[Formula: see text]. In addition, the intrinsic efficiency of the J-PET was also determined as a function of the energy of the incident photons. CONCLUSION A method for determining registration efficiency as a function of energy deposition and intrinsic efficiency as a function of incident photon energy of the J-PET scanner was demonstrated. This study is crucial for evaluating the performance of the scanner based on plastic scintillators and its applications as a standard and multi-photon PET systems. The method may be also used in the calibration of Compton-cameras developed for the ion-beam therapy monitoring and simultaneous multi-radionuclide imaging in nuclear medicine.
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Affiliation(s)
- S Sharma
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland.
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland.
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland.
| | - J Baran
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - N Chug
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - C Curceanu
- INFN, Laboratori Nazionali di Frascati, 00044, Frascati, Italy
| | - E Czerwiński
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - M Dadgar
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - K Dulski
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - K Eliyan
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - A Gajos
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - N Gupta-Sharma
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
| | - B C Hiesmayr
- Faculty of Physics, University of Vienna, 1090, Vienna, Austria
| | - K Kacprzak
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - Ł Kapłon
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - K Klimaszewski
- Department of Complex Systems, National Centre for Nuclear Research, 05-400, Otwock-Świerk, Poland
| | - P Konieczka
- Department of Complex Systems, National Centre for Nuclear Research, 05-400, Otwock-Świerk, Poland
| | - G Korcyl
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
| | - T Kozik
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
| | - W Krzemień
- High Energy Physics Division, National Centre for Nuclear Research, 05-400, Otwock-Świerk, Poland
| | - D Kumar
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - Sz Niedźwiecki
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - D Panek
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - S Parzych
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - E Perez Del Rio
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - L Raczyński
- Department of Complex Systems, National Centre for Nuclear Research, 05-400, Otwock-Świerk, Poland
| | - Shivani Choudhary
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - R Y Shopa
- Department of Complex Systems, National Centre for Nuclear Research, 05-400, Otwock-Świerk, Poland
| | - M Skurzok
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - E Ł Stępień
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - F Tayefi
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - K Tayefi
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
| | - W Wiślicki
- High Energy Physics Division, National Centre for Nuclear Research, 05-400, Otwock-Świerk, Poland
| | - P Moskal
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. Stanisława Łojasiewicza 11, 30-348, Cracow, Poland
- Total-Body Jagiellonian-PET Laboratory, Jagiellonian University, 30-348, Cracow, Poland
- Center for Theranostics, Jagiellonian University, 31-034, Cracow, Poland
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7
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Tashima H, Nishina T, Takyu S, Nishikido F, Suga M, Yamaya T. Optimum selection for multi-interaction events in Compton-PET hybrid reconstruction: a Monte Carlo study. Radiol Phys Technol 2023; 16:254-261. [PMID: 36943646 DOI: 10.1007/s12194-023-00714-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 03/13/2023] [Accepted: 03/13/2023] [Indexed: 03/23/2023]
Abstract
In Compton PET, that has a scatterer inserted inside a PET ring, there are multi-interaction events that can be treated as both PET and Compton events. A PET event from multi-interaction events that include a Compton event and a photoelectric absorption event or two Compton events can be extracted by applying a PET recovery method. In this study, we aimed to establish a method to maximize image quality by utilizing such redundant events. We conducted brain-scale Monte Carlo simulations of a C-shaped Compton-PET geometry and a whole gamma imaging (WGI) geometry. Images were reconstructed by a hybrid image reconstruction method combining both PET and Compton events. The result showed that the spatial resolution was improved when treated as PET events while keeping the noise level. The effect of improvement was more significant in WGI than in C-shaped Compton PET because the number of events recovered as PET events having more accurate spatial information was much larger in WGI. When the PET-recovered multi-interaction events were also included as Compton events in the hybrid reconstruction, we did not observe any improvement in image quality, while the number of used events was largest. The results suggested that treating events as PET events exclusively was better for image quality.
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Affiliation(s)
- Hideaki Tashima
- National Institutes for Quantum Science and Technology, 4-9-1, Anagawa, Inage-ku, Chiba-shi, Chiba, 263-8555, Japan.
| | - Takumi Nishina
- National Institutes for Quantum Science and Technology, 4-9-1, Anagawa, Inage-ku, Chiba-shi, Chiba, 263-8555, Japan
- Medical Engineering Course, Graduate School of Science and Engineering, Chiba University, 1-33, Yayoicho, Inage-ku, Chiba-shi, Chiba, 263-8522, Japan
| | - Sodai Takyu
- National Institutes for Quantum Science and Technology, 4-9-1, Anagawa, Inage-ku, Chiba-shi, Chiba, 263-8555, Japan
| | - Fumihiko Nishikido
- National Institutes for Quantum Science and Technology, 4-9-1, Anagawa, Inage-ku, Chiba-shi, Chiba, 263-8555, Japan
| | - Mikio Suga
- Medical Engineering Course, Graduate School of Science and Engineering, Chiba University, 1-33, Yayoicho, Inage-ku, Chiba-shi, Chiba, 263-8522, Japan
- Center for Frontier Medical Engineering, Chiba University, 1-33, Yayoicho, Inage-ku, Chiba-shi, Chiba, 263-8522, Japan
| | - Taiga Yamaya
- National Institutes for Quantum Science and Technology, 4-9-1, Anagawa, Inage-ku, Chiba-shi, Chiba, 263-8555, Japan
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