Comparison of different methods for shielding design in computed tomography.
Radiat Prot Dosimetry
; 147(1-2): 133-6, 2011 Sep.
Article
em En
| MEDLINE
| ID: mdl-21743070
ABSTRACT
The purpose of this work is to compare different methods for shielding calculation in computed tomography (CT). The BIR-IPEM (British Institute of Radiology and Institute of Physics in Engineering in Medicine) and NCRP (National Council on Radiation Protection) method were used for shielding thickness calculation. Scattered dose levels and calculated barrier thickness were also compared with those obtained by scatter dose measurements in the vicinity of a dedicated CT unit. Minimal requirement for protective barriers based on BIR-IPEM method ranged between 1.1 and 1.4 mm of lead demonstrating underestimation of up to 20 % and overestimation of up to 30 % when compared with thicknesses based on measured dose levels. For NCRP method, calculated thicknesses were 33 % higher (27-42 %). BIR-IPEM methodology-based results were comparable with values based on scattered dose measurements, while results obtained using NCRP methodology demonstrated an overestimation of the minimal required barrier thickness.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Doses de Radiação
/
Proteção Radiológica
/
Tomografia Computadorizada por Raios X
/
Desenho Assistido por Computador
Limite:
Humans
Idioma:
En
Revista:
Radiat Prot Dosimetry
Ano de publicação:
2011
Tipo de documento:
Article