Quality Control of Portal Imaging with PTW EPID QC PHANTOM.
Strahlenther Onkol
; 185(1): 56-60, 2009 Jan.
Article
em En
| MEDLINE
| ID: mdl-19224148
ABSTRACT
PURPOSE:
Quality assurance (QA) and quality control (QC) of different electronic portal imaging devices (EPID) and portal images with the PTW EPID QC PHANTOM. MATERIAL ANDMETHODS:
Characteristic properties of images of different file formats were measured on Siemens OptiVue500aSi, Siemens BeamView Plus, Elekta iView, and Varian PortalVision and analyzed with the epidSoft 2.0 program in four radiation therapy centers. The portal images were taken with Kodak X-OMAT V and the Kodak Portal Localisation ReadyPack films and evaluated with the same program.RESULTS:
The optimal exposition both for EPIDs and portal films of different kind was determined. For double exposition, the 2+1 MU values can be recommended in the case of Siemens OptiVue500aSi Elekta iView and Kodak Portal Localisation ReadyPack films, while for Siemens BeamView Plus, Varian PortalVision and Kodak X-OMAT V film 7+7 MU is recommended.CONCLUSION:
The PTW EPID QC PHANTOM can be used not only for amorphous silicon EPIDs but also for images taken with a video-based system or by using an ionization chamber matrix or for portal film. For analysis of QC tests, a standardized format (used at the acceptance test) should be applied, as the results are dependent on the file format used.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Garantia da Qualidade dos Cuidados de Saúde
/
Radiometria
/
Ecrans Intensificadores para Raios X
/
Imagens de Fantasmas
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article