The dosimetric properties of an applicator system for intraoperative electron-beam therapy utilizing a Clinac-18 accelerator.
Med Phys
; 9(2): 261-8, 1982.
Article
em En
| MEDLINE
| ID: mdl-6806596
ABSTRACT
A prototype electron applicator system providing circular and rectangular fields for use in intraoperative electron beam therapy with a Varian Clinac 18 linear accelerator has been fabricated. The dosimetric properties of this system for a variety of electron-beam energies, applicator sizes, and x-ray collimator settings was documented. Significant findings include (a) surface dose values are in excess of 90% for electron energies of 12 MeV and above; (b) for the 18-MeV beam, the deepest depth where the central axis dose in 90% of its maximum value is in excess of 50 mm for circular applicators whose diameters are in excess of 5 cm; and (c) the treatment time to deliver 1000 rads "given dose" (at given dose rate of 300 MU/min) is on the order of 3-4 min. Cross-field behavior is acceptable for the intended application and x-ray contamination is less than 4% for any applicator/electron energy combination. A system for irregular field blocking and TLD verification dosimetry has been developed.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Radioterapia de Alta Energia
/
Elétrons
/
Neoplasias
Limite:
Humans
Idioma:
En
Revista:
Med Phys
Ano de publicação:
1982
Tipo de documento:
Article