Dosimetric analysis on the region of perpendicular electron-photon matching fields / 生物医学工程学杂志
Journal of Biomedical Engineering
; (6): 673-677, 2008.
Article
em Zh
| WPRIM
| ID: wpr-342767
Biblioteca responsável:
WPRO
ABSTRACT
Hot spots and cold spots always appear in the matched region of electron-photon fields. The degree of this kind of dose heterogeneity depends on the physical characteristic of a treatment unit and the energy of electrons. In this paper, a set of dosimetric parameters have been measured on electron rays and x rays for the Elekta Precise treatment unit and the Elekta Synergy treatment unit, respectively. The hot spots and cold spots in the region of perpendicular electron-photon matching fields have been analysed quantitatively. The method to extend penumbra for photon beam profiles was proposed for improving the dose uniformity in the matched regions. And the dose profiles in the matched regions for different treatment units were compared. The results showed that there were stronger hot spots and cold spots for treatment unit with smaller penumbra for photon beams either under the condition of unmodified photon beam profile or the condition of modified photon beam profile.
Texto completo:
1
Base de dados:
WPRIM
Assunto principal:
Radioterapia
/
Dosagem Radioterapêutica
/
Simulação por Computador
/
Planejamento da Radioterapia Assistida por Computador
/
Radioterapia de Alta Energia
/
Fótons
/
Elétrons
/
Neoplasias de Cabeça e Pescoço
/
Métodos
/
Modelos Teóricos
Tipo de estudo:
Prognostic_studies
Limite:
Humans
Idioma:
Zh
Revista:
Journal of Biomedical Engineering
Ano de publicação:
2008
Tipo de documento:
Article