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Selva A, Bolst D, Bianchi A, Guatelli S, Conte V. Energy imparted and ionisation yield at the nanometre scale: results for extended beams. RADIATION PROTECTION DOSIMETRY 2023; 199:1984-1988. [PMID: 37819329 DOI: 10.1093/rpd/ncac253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 10/17/2022] [Accepted: 11/02/2022] [Indexed: 10/13/2023]
Abstract
The metrological problem of interpreting ionisation-based micro- and nanodosimetric measurements in terms of quantities proportional to energy imparted becomes particularly relevant when the sensitive volume (SV) size is in the nanometre range. At these scales, a constant W-value cannot be assumed, and the stochastics of the energy transfer per single collision could play a more important role. This problem was recently analysed by our group by means of track-structure Monte Carlo simulations with the Geant4-DNA code, finding a strong correlation between the energy imparted and ionisation yield also for SV diameters of 1 nm. As the previous study was limited to primary beams of radius zero crossing the sensitive sphere along its diameter, it is the aim of the present work to extend the analysis to beams with a radius larger than the dimensions of the SV, to better assess the role played by secondary electrons.
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Affiliation(s)
- Anna Selva
- Istituto Nazionale di Fisica Nucleare INFN, Laboratori Nazionali di Legnaro, viale dell'Università 2, Legnaro 20133, Italy
| | - David Bolst
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Anna Bianchi
- Istituto Nazionale di Fisica Nucleare INFN, Laboratori Nazionali di Legnaro, viale dell'Università 2, Legnaro 20133, Italy
| | - Susanna Guatelli
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Valeria Conte
- Istituto Nazionale di Fisica Nucleare INFN, Laboratori Nazionali di Legnaro, viale dell'Università 2, Legnaro 20133, Italy
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2
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Rucinski A, Biernacka A, Schulte R. Applications of nanodosimetry in particle therapy planning and beyond. Phys Med Biol 2021; 66. [PMID: 34731854 DOI: 10.1088/1361-6560/ac35f1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 11/03/2021] [Indexed: 12/28/2022]
Abstract
This topical review summarizes underlying concepts of nanodosimetry. It describes the development and current status of nanodosimetric detector technology. It also gives an overview of Monte Carlo track structure simulations that can provide nanodosimetric parameters for treatment planning of proton and ion therapy. Classical and modern radiobiological assays that can be used to demonstrate the relationship between the frequency and complexity of DNA lesion clusters and nanodosimetric parameters are reviewed. At the end of the review, existing approaches of treatment planning based on relative biological effectiveness (RBE) models or dose-averaged linear energy transfer are contrasted with an RBE-independent approach based on nandosimetric parameters. Beyond treatment planning, nanodosimetry is also expected to have applications and give new insights into radiation protection dosimetry.
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Affiliation(s)
| | - Anna Biernacka
- University of Gdansk, Intercollegiate Faculty of Biotechnology of University of Gdańsk and Medical University of Gdansk, 80-307 Gdansk, Poland
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4
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Ngcezu SA, Rabus H. Investigation into the foundations of the track-event theory of cell survival and the radiation action model based on nanodosimetry. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2021; 60:559-578. [PMID: 34427743 PMCID: PMC8551112 DOI: 10.1007/s00411-021-00936-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 08/14/2021] [Indexed: 06/13/2023]
Abstract
This work aims at elaborating the basic assumptions behind the "track-event theory" (TET) and its derivate "radiation action model based on nanodosimetry" (RAMN) by clearly distinguishing between effects of tracks at the cellular level and the induction of lesions in subcellular targets. It is demonstrated that the model assumptions of Poisson distribution and statistical independence of the frequency of single and clustered DNA lesions are dispensable for multi-event distributions because they follow from the Poisson distribution of the number of tracks affecting the considered target volume. It is also shown that making these assumptions for the single-event distributions of the number of lethal and sublethal lesions within a cell would lead to an essentially exponential dose dependence of survival for practically relevant values of the absorbed dose. Furthermore, it is elucidated that the model equation used for consideration of repair within the TET is based on the assumption that DNA lesions induced by different tracks are repaired independently. Consequently, the model equation is presumably inconsistent with the model assumptions and requires an additional model parameter. Furthermore, the methodology for deriving model parameters from nanodosimetric properties of particle track structure is critically assessed. Based on data from proton track simulations it is shown that the assumption of statistically independent targets leads to the prediction of negligible frequency of clustered DNA damage. An approach is outlined how track structure could be considered in determining the model parameters, and the implications for TET and RAMN are discussed.
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Affiliation(s)
| | - Hans Rabus
- Physikalisch-Technische Bundesanstalt (PTB), 10587, Berlin, Germany.
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5
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Harrison RM, Ainsbury E, Alves J, Bottollier-Depois JF, Breustedt B, Caresana M, Clairand I, Fantuzzi E, Fattibene P, Gilvin P, Hupe O, Knežević Ž, Lopez MA, Olko P, Olšovcová V, Rabus H, Rühm W, Silari M, Stolarczyk L, Tanner R, Vanhavere F, Vargas A, Woda C. EURADOS STRATEGIC RESEARCH AGENDA 2020: VISION FOR THE DOSIMETRY OF IONISING RADIATION. RADIATION PROTECTION DOSIMETRY 2021; 194:42-56. [PMID: 33989429 PMCID: PMC8165425 DOI: 10.1093/rpd/ncab063] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 02/28/2021] [Accepted: 04/06/2021] [Indexed: 05/02/2023]
Abstract
Since 2012, the European Radiation Dosimetry Group (EURADOS) has developed its Strategic Research Agenda (SRA), which contributes to the identification of future research needs in radiation dosimetry in Europe. Continued scientific developments in this field necessitate regular updates and, consequently, this paper summarises the latest revision of the SRA, with input regarding the state of the art and vision for the future contributed by EURADOS Working Groups and through a stakeholder workshop. Five visions define key issues in dosimetry research that are considered important over at least the next decade. They include scientific objectives and developments in (i) updated fundamental dose concepts and quantities, (ii) improved radiation risk estimates deduced from epidemiological cohorts, (iii) efficient dose assessment for radiological emergencies, (iv) integrated personalised dosimetry in medical applications and (v) improved radiation protection of workers and the public. This SRA will be used as a guideline for future activities of EURADOS Working Groups but can also be used as guidance for research in radiation dosimetry by the wider community. It will also be used as input for a general European research roadmap for radiation protection, following similar previous contributions to the European Joint Programme for the Integration of Radiation Protection Research, under the Horizon 2020 programme (CONCERT). The full version of the SRA is available as a EURADOS report (www.eurados.org).
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Affiliation(s)
| | - E Ainsbury
- Public Health England, Chilton, Didcot, UK
| | - J Alves
- Instituto Superior Técnico (IST), CTN, Lisboa, Portugal
| | - J-F Bottollier-Depois
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Fontenay-aux-Roses Cedex, France
| | - B Breustedt
- Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | | | - I Clairand
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Fontenay-aux-Roses Cedex, France
| | - E Fantuzzi
- ENEA - Radiation Protection Institute, Bologna, Italy
| | - P Fattibene
- Istituto Superiore di Sanità (ISS), Rome, Italy
| | - P Gilvin
- Public Health England, Chilton, Didcot, UK
| | - O Hupe
- Physikalisch Technische Bundesanstalt (PTB), Braunschweig and Berlin, Germany
| | - Ž Knežević
- Ruđer Bošković Institute (RBI), Zagreb, Croatia
| | - M A Lopez
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
| | - P Olko
- Instytut Fizyki Jądrowej Polskiej Akademii Nauk (IFJ PAN), Kraków, Poland
| | - V Olšovcová
- ELI Beamlines, Institute of Physics, Czech Academy of Sciences, Dolní Břežany, Czech Republic
| | - H Rabus
- Physikalisch Technische Bundesanstalt (PTB), Braunschweig and Berlin, Germany
| | - W Rühm
- Helmholtz Zentrum München, Institute of Radiation Medicine, Neuherberg, Germany
| | - M Silari
- CERN, 1211 Geneva 23, Switzerland
| | - L Stolarczyk
- Danish Centre for Particle Therapy, Aarhus, Denmark
- Instytut Fizyki Jądrowej Polskiej Akademii Nauk (IFJ PAN), Kraków, Poland
| | - R Tanner
- Public Health England, Chilton, Didcot, UK
| | - F Vanhavere
- Belgian Nuclear Research Centre (SCK-CEN), Mol, Belgium
| | - A Vargas
- Institute of Energy Technologies, Universitat Politecnica de Catalunya, Barcelona, Spain
| | - C Woda
- Helmholtz Zentrum München, Institute of Radiation Medicine, Neuherberg, Germany
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