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Author(s) -
Callaghan Gill
Publication year - 2000
Publication title -
health and social care in the community
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 0.984
H-Index - 68
eISSN - 1365-2524
pISSN - 0966-0410
DOI - 10.1046/j.1365-2524.2000.00234-4.x
Subject(s) - imaging phantom , calibration , materials science , beam (structure) , nuclear medicine , irradiation , optics , proton , calibration curve , radiation , radiation therapy , physics , mathematics , medicine , nuclear physics , radiology , statistics , quantum mechanics , detection limit
This paper presents the results obtained using radiochromic (MD-55 GafChromic) film for the 2D and 3D dosimetric reconstruction of the dose delivered by a proton beam under the real conditions of a programme of radiotherapy treatment for ocular tumours. Standard microdensitometric measurements were used to determine the variation in film optical density (O.D.) vs dose. Calibration curves were obtained by least-square fitting of the experimental OD values using a second order polynomial. This allows conversion of O.D. to dose. With this procedure it was possible to determine the distribution of the dose delivered by the proton beam in a phantom composed of layers of GafChromic film, with high surface spatial resolution and, through sections, the complete mapping of the dose delivered to a volume subjected to irradiation, as in a course of radiotherapy treatment.