Technical note: Heterogeneity dose calculation accuracy in IMRT: study of five commercial treatment planning systems using an anthropomorphic thorax phantom.
Med Phys
; 35(12): 5434-9, 2008 Dec.
Article
en En
| MEDLINE
| ID: mdl-19175103
ABSTRACT
The purpose of this study was to determine the accuracy of five commonly used intensity-modulated radiation therapy (IMRT) treatment planning systems (TPSs), 3 using convolution superposition algorithms or the analytical anisotropic algorithm (CSA/AAAs) and 2 using pencil beam algorithms (PBAs), in calculating the absorbed dose within a low-density, heterogeneous region when compared with measurements made in an anthropomorphic thorax phantom. The dose predicted in the target center met the test criteria (5% of the dose normalization point or 3 mm distance to agreement) for all TPSs tested; however, at the tumor-lung interface and at the peripheral lung in the vicinity of the tumor, the CSA/AAAs performed better than the PBAs (85% and 50%, respectively, of pixels meeting the 5%/3-mm test criteria), and thus should be used to determine dose in heterogeneous regions.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Radiometría
/
Neoplasias Torácicas
/
Planificación de la Radioterapia Asistida por Computador
/
Radiografía Torácica
/
Radioterapia de Intensidad Modulada
/
Neoplasias Pulmonares
Tipo de estudio:
Prognostic_studies
Límite:
Humans
Idioma:
En
Revista:
Med Phys
Año:
2008
Tipo del documento:
Article
País de afiliación:
Estados Unidos