Total body irradiation for standard treatment rooms: a robust sweeping beam technique with respect to the body shape.
TBI
arc therapy
patient comfort
sweeping beam technique
total body irradiation
Journal
Reports of practical oncology and radiotherapy : journal of Greatpoland Cancer Center in Poznan and Polish Society of Radiation Oncology
ISSN: 1507-1367
Titre abrégé: Rep Pract Oncol Radiother
Pays: Poland
ID NLM: 100885761
Informations de publication
Date de publication:
2022
2022
Historique:
received:
15
12
2022
accepted:
23
02
2022
entrez:
27
10
2022
pubmed:
28
10
2022
medline:
28
10
2022
Statut:
epublish
Résumé
The purpose of this work is to improve a sweeping beam technique for total body irradiation (TBI) on a low flat couch using a varying patient thickness model. We designed a flat couch for total body irradiation in supine and prone position. Three generic arcs with rectangular segments for a patient torso thickness of 16, 22 and 28 cm were generated with respect to varying patient thickness of four particular parts of the body: head, torso, thighs and calves. Longitudinal and transversal dose profiles were measured using an ionization chamber and the EBT3 gafchromic film in a solid water slab phantom. The robustness of the method was examined in phantoms of different thicknesses. Measured dose homogeneity stays within ±10% of prescribed dose for all of the three patient thickness models. The robustness of the method was evaluated as the increase in dose in the phantom center of 0.7% per 1 cm reduction in phantom thickness. The method is applicable for the broad range of patient sizes, comfortable for patients, robust and suitable for standard treatment rooms with a standard linear accelerator. It requires minimal investments into equipment.
Sections du résumé
Background
UNASSIGNED
The purpose of this work is to improve a sweeping beam technique for total body irradiation (TBI) on a low flat couch using a varying patient thickness model. We designed a flat couch for total body irradiation in supine and prone position. Three generic arcs with rectangular segments for a patient torso thickness of 16, 22 and 28 cm were generated with respect to varying patient thickness of four particular parts of the body: head, torso, thighs and calves.
Materials and methods
UNASSIGNED
Longitudinal and transversal dose profiles were measured using an ionization chamber and the EBT3 gafchromic film in a solid water slab phantom. The robustness of the method was examined in phantoms of different thicknesses.
Results
UNASSIGNED
Measured dose homogeneity stays within ±10% of prescribed dose for all of the three patient thickness models. The robustness of the method was evaluated as the increase in dose in the phantom center of 0.7% per 1 cm reduction in phantom thickness.
Conclusion
UNASSIGNED
The method is applicable for the broad range of patient sizes, comfortable for patients, robust and suitable for standard treatment rooms with a standard linear accelerator. It requires minimal investments into equipment.
Identifiants
pubmed: 36299377
doi: 10.5603/RPOR.a2022.0039
pii: rpor-27-2-268
pmc: PMC9591034
doi:
Types de publication
Journal Article
Langues
eng
Pagination
268-274Informations de copyright
© 2022 Greater Poland Cancer Centre.
Déclaration de conflit d'intérêts
Conflict of interest None declared.
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