Clinical implementation of dynamic multileaf collimation for compensated bladder treatments.
Radiother Oncol
; 59(1): 31-8, 2001 Apr.
Article
em En
| MEDLINE
| ID: mdl-11295203
ABSTRACT
BACKGROUND AND PURPOSE:
To describe the clinical implementation of dynamic multileaf collimation (DMLC). Custom compensated four-field treatments of carcinoma of the bladder have been used as a simple test site for the introduction of intensity modulated radiotherapy. MATERIALS ANDMETHODS:
Compensating intensity modulations are calculated from computed tomography (CT) data, accounting for scattered, as well as primary radiation. Modulations are converted to multileaf collimator (MLC) leaf and jaw settings for dynamic delivery on a linear accelerator. A full dose calculation is carried out, accounting for dynamic leaf and jaw motion and transmission through these components. Before treatment, a test run of the delivery is performed and an absolute dose measurement made in a water or solid water phantom. Treatments are verified by in vivo diode measurements and real-time electronic portal imaging.RESULTS:
Seven patients have been treated using DMLC. The technique improves dose homogeneity within the target volume, reducing high dose areas and compensating for loss of scatter at the beam edge. A typical total treatment time is 20 min.CONCLUSIONS:
Compensated bladder treatments have proven an effective test site for DMLC in an extremely busy clinic.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias da Bexiga Urinária
/
Planejamento da Radioterapia Assistida por Computador
/
Carcinoma
/
Radioterapia de Alta Energia
Tipo de estudo:
Diagnostic_studies
/
Prognostic_studies
Limite:
Humans
Idioma:
En
Revista:
Radiother Oncol
Ano de publicação:
2001
Tipo de documento:
Article
País de afiliação:
Reino Unido
País de publicação:
IE
/
IRELAND
/
IRLANDA