2D and 3D dose distribution determination in proton beam radiotherapy with GafChromic film detectors.
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.
Troja
S O
SO
Dipartimento di Fisica dell'Università, Catania, Italy. olindo.troja@ct.infn.it
Egger
E
E
Francescon
P
P
Gueli
A M
AM
Kacperek
A
A
Coco
M
M
Musmeci
R
R
Pedalino
A
A
D005134:Eye Neoplasms / Q000532:radiotherapy; D005373:Film Dosimetry / Q000295:instrumentation* / Q000379:methods; D006801:Humans; D019047:Phantoms, Imaging; D061766:Proton Therapy; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods*; D011882:Radiotherapy, High-Energy / Q000379:methods*; D012680:Sensitivity and Specificity; D011522:Protons
D011522:Protons