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Purushothaman S, Kostyleva D, Dendooven P, Haettner E, Geissel H, Schuy C, Weber U, Boscolo D, Dickel T, Graeff C, Hornung C, Kazantseva E, Kuzminchuk-Feuerstein N, Mukha I, Pietri S, Roesch H, Tanaka YK, Zhao J, Durante M, Parodi K, Scheidenberger C. Quasi-real-time range monitoring by in-beam PET: a case for 15O. Sci Rep 2023; 13:18788. [PMID: 37914762 PMCID: PMC10620432 DOI: 10.1038/s41598-023-45122-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Accepted: 10/16/2023] [Indexed: 11/03/2023] Open
Abstract
A fast and reliable range monitoring method is required to take full advantage of the high linear energy transfer provided by therapeutic ion beams like carbon and oxygen while minimizing damage to healthy tissue due to range uncertainties. Quasi-real-time range monitoring using in-beam positron emission tomography (PET) with therapeutic beams of positron-emitters of carbon and oxygen is a promising approach. The number of implanted ions and the time required for an unambiguous range verification are decisive factors for choosing a candidate isotope. An experimental study was performed at the FRS fragment-separator of GSI Helmholtzzentrum für Schwerionenforschung GmbH, Germany, to investigate the evolution of positron annihilation activity profiles during the implantation of [Formula: see text]O and [Formula: see text]O ion beams in a PMMA phantom. The positron activity profile was imaged by a dual-panel version of a Siemens Biograph mCT PET scanner. Results from a similar experiment using ion beams of carbon positron-emitters [Formula: see text]C and [Formula: see text]C performed at the same experimental setup were used for comparison. Owing to their shorter half-lives, the number of implanted ions required for a precise positron annihilation activity peak determination is lower for [Formula: see text]C compared to [Formula: see text]C and likewise for [Formula: see text]O compared to [Formula: see text]O, but their lower production cross-sections make it difficult to produce them at therapeutically relevant intensities. With a similar production cross-section and a 10 times shorter half-life than [Formula: see text]C, [Formula: see text]O provides a faster conclusive positron annihilation activity peak position determination for a lower number of implanted ions compared to [Formula: see text]C. A figure of merit formulation was developed for the quantitative comparison of therapy-relevant positron-emitting beams in the context of quasi-real-time beam monitoring. In conclusion, this study demonstrates that among the positron emitters of carbon and oxygen, [Formula: see text]O is the most feasible candidate for quasi-real-time range monitoring by in-beam PET that can be produced at therapeutically relevant intensities. Additionally, this study demonstrated that the in-flight production and separation method can produce beams of therapeutic quality, in terms of purity, energy, and energy spread.
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Affiliation(s)
- S Purushothaman
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany.
| | - D Kostyleva
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - P Dendooven
- Department of Radiation Oncology, Particle Therapy Research Center (PARTREC), University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - E Haettner
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - H Geissel
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
- II. Physikalisches Institut, Justus-Liebig-Universität, Gießen, Germany
| | - C Schuy
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - U Weber
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - D Boscolo
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - T Dickel
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
- II. Physikalisches Institut, Justus-Liebig-Universität, Gießen, Germany
| | - C Graeff
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
- Department of Electrical Engineering and Information Technology, Technische Universität Darmstadt, Darmstadt, Germany
| | - C Hornung
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - E Kazantseva
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | | | - I Mukha
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - S Pietri
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - H Roesch
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
- Institute for Nuclear Physics, Technische Universität Darmstadt, Darmstadt, Germany
| | - Y K Tanaka
- RIKEN Cluster for Pioneering Research, RIKEN, Wako, Japan
| | - J Zhao
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
- School of Physics, Beihang University, Beijing, China
| | - M Durante
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany.
- Department of Condensed Matter Physics, Technische Universität Darmstadt, Darmstadt, Germany.
| | - K Parodi
- Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians Universität München, Munich, Germany
| | - C Scheidenberger
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
- II. Physikalisches Institut, Justus-Liebig-Universität, Gießen, Germany
- Helmholtz Forschungsakademie Hessen für FAIR (HFHF), Campus Gießen, Gießen, Germany
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Haettner E, Geissel H, Franczak B, Kostyleva D, Purushothaman S, Tanaka Y, Amjad F, Boscolo D, Dickel T, Graeff C, Hessler C, Hornung C, Kazantseva E, Kuzminchuk N, Morrissey D, Mukha I, Pietri S, Rocco E, Roy P, Roesch H, Schuy C, Schütt P, Weber U, Weick H, Zhao J, Durante M, Parodi K, Scheidenberger C. Production and separation of positron emitters for hadron therapy at FRS-Cave M. Nucl Instrum Methods Phys Res B 2023; 541:114-116. [PMID: 37265512 PMCID: PMC7614599 DOI: 10.1016/j.nimb.2023.04.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The FRagment Separator FRS at GSI is a versatile spectrometer and separator for experiments with relativistic in-flight separated short-lived exotic beams. One branch of the FRS is connected to the target hall where the bio-medical cave (Cave M) is located. Recently a joint activity between the experimental groups of the FRS and the biophysics at the GSI and Department of physics at LMU was started to perform biomedical experiments relevant for hadron therapy with positron emitting carbon and oxygen beams. This paper presents the new ion-optical mode and commissioning results of the FRS-Cave M branch where positron emitting 15O-ions were provided to the medical cave for the first time. An overall conversion efficiency of 2.9±0.2×10-4 15O fragments per primary 16O ion accelerated in the synchrotron SIS18 was reached.
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Affiliation(s)
- E. Haettner
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - H. Geissel
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392, Gieβen, Germany
| | - B. Franczak
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - D. Kostyleva
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - S. Purushothaman
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - Y.K. Tanaka
- RIKEN Cluster for Pioneering Research, RIKEN, 351-0198, Saitama, Japan
| | - F. Amjad
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - D. Boscolo
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - T. Dickel
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392, Gieβen, Germany
| | - C. Graeff
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - C. Hessler
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - C. Hornung
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - E. Kazantseva
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - N. Kuzminchuk
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - D. Morrissey
- Department of Chemistry and NSCL, Michigan State University, 48824, East Lansing, USA
| | - I. Mukha
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - S. Pietri
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - E. Rocco
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - P. Roy
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - H. Roesch
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - C. Schuy
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - P. Schütt
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - U. Weber
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - H. Weick
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - J. Zhao
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - M. Durante
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
- Institut für Physik Kondensierter Materie, Technische Universität Darmstadt, 64289, Darmstadt, Germany
| | - K. Parodi
- Faculty of Physics, Department of Medical Physics, Ludwig-Maximilians-Universität München, 85748, München, Germany
| | - C. Scheidenberger
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392, Gieβen, Germany
- Helmholtz Research Academy Hesse for FAIR (HFHF), GSI Helmholtz Center for Heavy Ion Research, Campus Gieβen, 35392, Gieβen, Germany
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Kostyleva D, Purushothaman S, Dendooven P, Haettner E, Geissel H, Ozoemelam I, Schuy C, Weber U, Boscolo D, Dickel T, Drozd V, Graeff C, Franczak B, Hornung C, Horst F, Kazantseva E, Kuzminchuk-Feuerstein N, Mukha I, Nociforo C, Pietri S, Reidel CA, Roesch H, Tanaka YK, Weick H, Zhao J, Durante M, Parodi K, Scheidenberger C. Precision of the PET activity range during irradiation with 10C, 11C, and 12C beams. Phys Med Biol 2022; 68. [PMID: 36533621 DOI: 10.1088/1361-6560/aca5e8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 11/24/2022] [Indexed: 11/25/2022]
Abstract
Objective. Beams of stable ions have been a well-established tool for radiotherapy for many decades. In the case of ion beam therapy with stable12C ions, the positron emitters10,11C are produced via projectile and target fragmentation, and their decays enable visualization of the beam via positron emission tomography (PET). However, the PET activity peak matches the Bragg peak only roughly and PET counting statistics is low. These issues can be mitigated by using a short-lived positron emitter as a therapeutic beam.Approach.An experiment studying the precision of the measurement of ranges of positron-emitting carbon isotopes by means of PET has been performed at the FRS fragment-separator facility of GSI Helmholtzzentrum für Schwerionenforschung GmbH, Germany. The PET scanner used in the experiment is a dual-panel version of a Siemens Biograph mCT PET scanner.Main results.High-quality in-beam PET images and activity distributions have been measured from the in-flight produced positron emitting isotopes11C and10C implanted into homogeneous PMMA phantoms. Taking advantage of the high statistics obtained in this experiment, we investigated the time evolution of the uncertainty of the range determined by means of PET during the course of irradiation, and show that the uncertainty improves with the inverse square root of the number of PET counts. The uncertainty is thus fully determined by the PET counting statistics. During the delivery of 1.6 × 107ions in 4 spills for a total duration of 19.2 s, the PET activity range uncertainty for10C,11C and12C is 0.04 mm, 0.7 mm and 1.3 mm, respectively. The gain in precision related to the PET counting statistics is thus much larger when going from11C to10C than when going from12C to11C. The much better precision for10C is due to its much shorter half-life, which, contrary to the case of11C, also enables to include the in-spill data in the image formation.Significance. Our results can be used to estimate the contribution from PET counting statistics to the precision of range determination in a particular carbon therapy situation, taking into account the irradiation scenario, the required dose and the PET scanner characteristics.
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Affiliation(s)
- D Kostyleva
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - S Purushothaman
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - P Dendooven
- Particle Therapy Research Center (PARTREC), Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - E Haettner
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - H Geissel
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany.,II. Physikalisches Institut, Justus-Liebig-Universität, Gießen, Germany
| | - I Ozoemelam
- Fontys University of Applied Sciences, Eindhoven, The Netherlands
| | - C Schuy
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - U Weber
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - D Boscolo
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - T Dickel
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany.,II. Physikalisches Institut, Justus-Liebig-Universität, Gießen, Germany
| | - V Drozd
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany.,Faculty of Science and Engineering, University of Groningen, Groningen, The Netherlands
| | - C Graeff
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - B Franczak
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - C Hornung
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - F Horst
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - E Kazantseva
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | | | - I Mukha
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - C Nociforo
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - S Pietri
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - C A Reidel
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - H Roesch
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany.,Institute for Nuclear Physics, Technische Universität Darmstadt, Darmstadt, Germany
| | - Y K Tanaka
- RIKEN Cluster for Pioneering Research, Wako, Japan
| | - H Weick
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - J Zhao
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany.,School of Physics, Beihang University, Beijing, People's Republic of China
| | - M Durante
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany.,Department of Condensed Matter Physics, Technische Universität Darmstadt, Darmstadt, Germany
| | - K Parodi
- Department of Physics, Ludwig-Maximilians Universität München, Munich, Germany
| | - C Scheidenberger
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany.,II. Physikalisches Institut, Justus-Liebig-Universität, Gießen, Germany.,Helmholtz Forschungsakademie Hessen für FAIR (HFHF), Campus Gießen, Gießen, Germany
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Cordoni F, Attili A, Tommasino F, Boscolo D, Fuss M, La Tessa C, Scifoni E. FLASH Mechanisms Track (Oral Presentations) A MULTISCALE EXTENSION OF THE GENERALIZED STOCHASTIC MICRODOSIMETRIC MODEL (GSM2) TO DESCRIBE DYNAMICAL OXYGENATION AND FAST REACTION KINETICS FOR UNRAVELING THE FLASH EFFECT. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)01517-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Weber U, Tinganelli W, Sokol O, Quartieri M, Puspitasari A, Dokic I, Abdollahi A, Durante M, Haberer T, Debus J, Boscolo D, Voss B, Brons S, Moustafa M, Schuy C, Baack L, Horst F, Zink K, Simeonov Y. FLASH Modalities Track (Oral Presentations) ULTRA-HIGH DOSE RATE (FLASH) CARBON ION IRRADIATION: FIRST IN VITRO AND IN VIVO RESULTS. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)01510-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Camazzola G, Boscolo D, Scifoni E, Durante M, Kraemer M, Fuss M. CURRENT STATUS OF THE TRAX-CHEM EXTENSION TO THE HOMOGENEOUS CHEMICAL STAGE. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)01640-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Fuss MC, Boscolo D, Durante M, Scifoni E, Krämer M. Systematic quantification of nanoscopic dose enhancement of gold nanoparticles in ion beams. Phys Med Biol 2020; 65:075008. [PMID: 32045892 DOI: 10.1088/1361-6560/ab7504] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
High-Z material nanoparticles are being studied as localized dose enhancers in radiotherapeutic applications. Here, the nano-scale physical dose enhancement of proton, carbon and oxygen ion beam radiation by gold nanoparticles was studied by means of Monte Carlo track structure simulation with the TRAX code. We present 2D distributions and radial profiles of the additional dose and the dose enhancement factor for two geometries which consider an isolated and a water-embedded nanoparticle, respectively. Different nanoparticle sizes (radius of 1.2-22 nm) were found to yield qualitatively different absolute and relative dose enhancement distributions and different maximum dose enhancement factors (up to 20). Whereas the smallest nanoparticles produced the highest local dose enhancement factor close to the metal, larger ones led to lower, more diffuse dose enhancement factors that contributed more at larger distances. Differential absorption effects inside the metal were found to be responsible for those characteristics. For the energy range 15-204 MeVu-1, also a mild trend with ion E/A, regardless of the ion species, was found for embedded nanoparticles. In analogy to the width of the ion track itself, slower ions increased the enhancement at the nanoparticle surface. In contrast, no dependence on linear energy transfer was encountered. For slower ions (3-10 MeVu-1), the enhancement effect began to break down over all distances. Finally, the significance of any indirect physical effect was excluded, giving important hints especially in view of the low probabilities (at realistic concentrations and fluences) of direct ion-NP-hits. The very localized nature of the physical dose enhancement found suggests a strong action upon targets closeby, but no relevant effect at cellular distances. When pondering different possible damage enhancement mechanisms of gold nanoparticles in the context of published in vitro and in vivo experimental results, biological pathways are likely to play the key role.
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Affiliation(s)
- M C Fuss
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
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Boscolo D, Krämer M, Durante M, Fuss M, Scifoni E. TRAX-CHEM: A pre-chemical and chemical stage extension of the particle track structure code TRAX in water targets. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.02.051] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Sokol O, Scifoni E, Tinganelli W, Kraft-Weyrather W, Wiedemann J, Maier A, Boscolo D, Friedrich T, Brons S, Durante M, Krämer M. Oxygen beams for therapy: advanced biological treatment planning and experimental verification. Phys Med Biol 2017; 62:7798-7813. [PMID: 28841579 DOI: 10.1088/1361-6560/aa88a0] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Nowadays there is a rising interest towards exploiting new therapeutical beams beyond carbon ions and protons. In particular, [Formula: see text]O ions are being widely discussed due to their increased LET distribution. In this contribution, we report on the first experimental verification of biologically optimized treatment plans, accounting for different biological effects, generated with the TRiP98 planning system with [Formula: see text]O beams, performed at HIT and GSI. This implies the measurements of 3D profiles of absorbed dose as well as several biological measurements. The latter includes the measurements of relative biological effectiveness along the range of linear energy transfer values from ≈20 up to ≈750 keV μ [Formula: see text], oxygen enhancement ratio values and the verification of the kill-painting approach, to overcome hypoxia, with a phantom imitating an unevenly oxygenated target. With the present implementation, our treatment planning system is able to perform a comparative analysis of different ions, according to any given condition of the target. For the particular cases of low target oxygenation, [Formula: see text]O ions demonstrate a higher peak-to-entrance dose ratio for the same cell killing in the target region compared to [Formula: see text]C ions. Based on this phenomenon, we performed a short computational analysis to reveal the potential range of treatment plans, where [Formula: see text]O can benefit over lighter modalities. It emerges that for more hypoxic target regions (partial oxygen pressure of ≈0.15% or lower) and relatively low doses (≈4 Gy or lower) the choice of [Formula: see text]O over [Formula: see text]C or [Formula: see text]He may be justified.
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Affiliation(s)
- O Sokol
- Biophysics Department, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, D-64291 Darmstadt, Germany
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Bovolenta S, Boscolo D, Dovier S, Morgante M, Pallotti A, Piasentier E. Chemical, physiochemical properties and microbiological characterization of a typical product, Pitina, made by Alpagota sheep meat. Italian Journal of Animal Science 2016. [DOI: 10.4081/ijas.2007.1s.536] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- S. Bovolenta
- Dipartimento di Scienze Animali, Università di Udine, Italy
| | - D. Boscolo
- Dipartimento di Scienze Animali, Università di Udine, Italy
| | - S. Dovier
- Dipartimento di Scienze Animali, Università di Udine, Italy
| | - M. Morgante
- Dipartimento di Scienze Animali, Università di Udine, Italy
| | - A. Pallotti
- Dipartimento di Salute Pubblica Veterinaria e Patologia Animale, Università di Bologna, Italy
| | - E. Piasentier
- Dipartimento di Scienze Animali, Università di Udine, Italy
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Osualdini M, Iacumin L, Boscolo D, Bovolenta S, Comi G. MICROBIAL ECOLOGY OF PITINA. Ital J Food Saf 2009. [DOI: 10.4081/ijfs.2008.4.63] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Iacumin L, Manzano M, Pustetto H, Giusto C, Boscolo D, Comi G. EFFECT OF ESSENTIAL OIL ON BIOFILM PRODUCTION BY DIFFERENT LISTERIA MONOCYTOGENES STRAINS. Ital J Food Saf 2008. [DOI: 10.4081/ijfs.2008.2.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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