Use of a dynamic rangeshifter for modifying the depth-dose distributions of negative pions.
Med Phys
; 4(5): 404-7, 1977.
Article
em En
| MEDLINE
| ID: mdl-409920
ABSTRACT
In order to use negative pions for the treatment of large deep-seated tumors in radiotherapy, it is necessary to produce depth-dose distributions tailored to specific shapes. We present here a method of beam shaping which utilizes a fluid-filled piston having a programmable, computer-controlled, time-dependent thickness. The fluid alters the residual range of the pions such that predetermined depth-dose distributions can be obtained. Changing from one distribution to another can be accomplished simply and rapidly without access to the treatment room. Depth-dose distributions which are flat over a range in depth up to 10 cm have been produced. Distributions tailored to produce flat "effective dose" versus depth have also been obtained.
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01-internacional
Base de dados:
MEDLINE
Assunto principal:
Dosagem Radioterapêutica
/
Radioterapia de Alta Energia
/
Neoplasias
Idioma:
En
Revista:
Med Phys
Ano de publicação:
1977
Tipo de documento:
Article