Corrección del efecto volumétrico en una matriz 2D de cámaras de ionización
- Díaz Fuentes, Raúl
- Cabello Murillo, Eduardo
- Rodríguez Rodríguez, César
- Ferrando Sánchez, Alejandro
- Clemente Gutiérrez, Francisco
- Casa de Julián, Miguel Ángel de la
- Adaimi Hernández, P.
ISSN: 1576-6632
Year of publication: 2011
Volume: 12
Issue: 1
Pages: 33-38
Type: Article
More publications in: Revista de Física Médica
Abstract
There are three main snags related to the measurement of spatial distributions of absorbed dose with two-dimensional array devices of ionisation chambers: spatial under-sampling, volumetric effect and inaccuracy in electric charge to absorbed dose conversion coefficient due to lack of lateral electronic equilibrium. In this work we have experimentally estimated the error in the raw measurement of dose by one of such chambers. We have found that the major error factor is the volumetric effect, which can be corrected through the well-known techniques of convolution/deconvolution.