Analysis of fiducial markers used for on-line verification in the external-beam radiotherapy of patients with cranial tumours.
Clin Transl Oncol
; 9(8): 531-6, 2007 Aug.
Article
em En
| MEDLINE
| ID: mdl-17720656
ABSTRACT
PURPOSE:
Evaluate the fiducial marker-based position verification in the external-beam radiotherapy of patients with cranial tumour.METHODS:
Thirteen patients with intracranial tumours were treated with external- beam radiotherapy using 3 gold markers implanted in the skull. Before each fraction the patient was positioned on the treatment table and 2 orthogonal portal images were performed to localise the 3 gold seeds and the target position was calculated using a commercialised computer program (ISOLOC software, MEDTEC). This program provides the couch movements required to move the target to the isocentre.RESULTS:
When the set-up error was corrected using the coordinates of the 3 markers, the final movements were less than 2 mm in all cases lateral, mean v., 1.21 mm; longitudinal, 1.23 mm; and anteroposterior, 1.18 mm. No serious complications related to the gold marker insertion were noted.CONCLUSION:
The use of 3 implanted fiducial seeds is an optimal technique for precise set-up in patients with brain tumours treated with external radiotherapy. This commercial system is highly suitable for fractionated stereotactic irradiation.
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Base de dados:
MEDLINE
Assunto principal:
Crânio
/
Planejamento da Radioterapia Assistida por Computador
/
Neoplasias Encefálicas
Tipo de estudo:
Diagnostic_studies
Limite:
Humans
Idioma:
En
Ano de publicação:
2007
Tipo de documento:
Article