Reproducibility of conformal radiation therapy in localized carcinoma of the prostate without rigid immobilization.
Radiother Oncol
; 38(3): 223-30, 1996 Mar.
Article
em En
| MEDLINE
| ID: mdl-8693102
ABSTRACT
The reproducibility of 3-dimensional (3D) conformal therapy in localized prostate cancer was studied in 14 patients, based on retrospective analysis of 196 anteroposterior-posteroanterior (AP/PA) and lateral portal images. The patients were treated supine without rigid immobilization using six isocentric coplanar conformal fields. Three different observers independently compared the portal and simulation images, determining the deviation of each portal film from the corresponding simulation film. No significant deviations were observed in the cephalo-caudal or lateral axes (0 mm median values). However, a systematic median shift of 5 mm (0 to + 10, range) was observed in the anteroposterior direction, presumably as a consequence of a sagging in the treatment couch under the patient's weight. After modification of the treatment couch, no further systematic anteroposterior shifts have been observed. These results demonstrate that the daily setup of conformal prostate irradiation fields can be performed with acceptable reproducibility without the use of special immobilization devices.
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Bases de dados:
MEDLINE
Assunto principal:
Neoplasias da Próstata
/
Radioterapia Assistida por Computador
/
Adenocarcinoma
/
Radioterapia de Alta Energia
Limite:
Aged
/
Humans
/
Male
Idioma:
En
Revista:
Radiother Oncol
Ano de publicação:
1996
Tipo de documento:
Article
País de afiliação:
Suíça