Cargando…
Sparse proportional re-scanning with hadron beams
Spot Scanning is a well-established technique to deliver the dose with hadron therapy systems. For many years re-scanning (called also re-painting) has been used to achieve uniform dose distribution in particular for moving organs, although it leads to an increase of the treatment time. Reducing thi...
Autores principales: | , , , , , |
---|---|
Lenguaje: | eng |
Publicado: |
2019
|
Materias: | |
Acceso en línea: | https://dx.doi.org/10.1016/j.ejmp.2019.07.022 http://cds.cern.ch/record/2759035 |
_version_ | 1780970293858140160 |
---|---|
author | Amaldi, Ugo Cuccagna, Caterina Lo Moro, Alessandra Rizzoglio, Valeria Bernier, Jacques Bulling, Shelley |
author_facet | Amaldi, Ugo Cuccagna, Caterina Lo Moro, Alessandra Rizzoglio, Valeria Bernier, Jacques Bulling, Shelley |
author_sort | Amaldi, Ugo |
collection | CERN |
description | Spot Scanning is a well-established technique to deliver the dose with hadron therapy systems. For many years re-scanning (called also re-painting) has been used to achieve uniform dose distribution in particular for moving organs, although it leads to an increase of the treatment time. Reducing this time is a major focus of present research. In this paper, after reviewing the current re-scanning techniques, sparse proportional re-scanning is defined and applied to 29 proton patient cases for a total of 54 fields. In this technique, only the highest weighted spot in the whole target is visited a number of times that is equal to the number N of re-scans. The number of visits of the beam spot to all remaining spots is scaled down proportionally to their weight. Sparse proportional re-scanning is advantageous especially in volumetric re-scanning. In order to quantify the potential advantages of this technique in terms of treatment time, a reduction factor of the number of scanned spots has been introduced, evaluated and analysed for 54 proton fields. The conclusion is that the reduction factor is a function of N (having values equal to 2.8 ± 0.3 and 3.6 ± 0.4 for N = 5 and N = 12 respectively) and does not depend either on the shape and volume of the target or on the distance between the scanned layers and the spot grid. The same values are approximately valid also for carbon ion treatments. |
id | oai-inspirehep.net-1849841 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2019 |
record_format | invenio |
spelling | oai-inspirehep.net-18498412021-06-21T13:16:49Zdoi:10.1016/j.ejmp.2019.07.022http://cds.cern.ch/record/2759035engAmaldi, UgoCuccagna, CaterinaLo Moro, AlessandraRizzoglio, ValeriaBernier, JacquesBulling, ShelleySparse proportional re-scanning with hadron beamsAccelerators and Storage RingsHealth Physics and Radiation EffectsSpot Scanning is a well-established technique to deliver the dose with hadron therapy systems. For many years re-scanning (called also re-painting) has been used to achieve uniform dose distribution in particular for moving organs, although it leads to an increase of the treatment time. Reducing this time is a major focus of present research. In this paper, after reviewing the current re-scanning techniques, sparse proportional re-scanning is defined and applied to 29 proton patient cases for a total of 54 fields. In this technique, only the highest weighted spot in the whole target is visited a number of times that is equal to the number N of re-scans. The number of visits of the beam spot to all remaining spots is scaled down proportionally to their weight. Sparse proportional re-scanning is advantageous especially in volumetric re-scanning. In order to quantify the potential advantages of this technique in terms of treatment time, a reduction factor of the number of scanned spots has been introduced, evaluated and analysed for 54 proton fields. The conclusion is that the reduction factor is a function of N (having values equal to 2.8 ± 0.3 and 3.6 ± 0.4 for N = 5 and N = 12 respectively) and does not depend either on the shape and volume of the target or on the distance between the scanned layers and the spot grid. The same values are approximately valid also for carbon ion treatments.oai:inspirehep.net:18498412019 |
spellingShingle | Accelerators and Storage Rings Health Physics and Radiation Effects Amaldi, Ugo Cuccagna, Caterina Lo Moro, Alessandra Rizzoglio, Valeria Bernier, Jacques Bulling, Shelley Sparse proportional re-scanning with hadron beams |
title | Sparse proportional re-scanning with hadron beams |
title_full | Sparse proportional re-scanning with hadron beams |
title_fullStr | Sparse proportional re-scanning with hadron beams |
title_full_unstemmed | Sparse proportional re-scanning with hadron beams |
title_short | Sparse proportional re-scanning with hadron beams |
title_sort | sparse proportional re-scanning with hadron beams |
topic | Accelerators and Storage Rings Health Physics and Radiation Effects |
url | https://dx.doi.org/10.1016/j.ejmp.2019.07.022 http://cds.cern.ch/record/2759035 |
work_keys_str_mv | AT amaldiugo sparseproportionalrescanningwithhadronbeams AT cuccagnacaterina sparseproportionalrescanningwithhadronbeams AT lomoroalessandra sparseproportionalrescanningwithhadronbeams AT rizzogliovaleria sparseproportionalrescanningwithhadronbeams AT bernierjacques sparseproportionalrescanningwithhadronbeams AT bullingshelley sparseproportionalrescanningwithhadronbeams |