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Estimation of Inhomogeneity Correction Factor in Small Field Dosimetry / 의학물리
Korean Journal of Medical Physics ; : 260-268, 2009.
Artigo em Coreano | WPRIM | ID: wpr-227386
ABSTRACT
In this study, we estimated inhomogeneity correction factor in small field. And, we evaluated accuracy of treatment planning and measurement data which applied inhomogeneity correction factor or not. We developed the Inhomogeneity Correction Phantom (ICP) for insertion of inhomogeneity materials. The inhomogeneity materials were 12 types in each different electron density. This phantom is able to adapt the EBT film and 0.125 cc ion chamber for measurement of dose distribution and point dose. We evaluated comparison of planning and measurement data using ICP. When we applied to inhomogeneity correction factor or not, the average difference was 1.63% and 10.05% in each plan and film measurement data. And, the average difference of dose distribution was 10.09% in each measurement film. And the average difference of point dose was 0.43% and 2.09% in each plan and measurement data. In conclusion, if we did not apply the inhomogeneity correction factor in small field, it shows more great difference in measurement data. The planning system using this study shows good result for correction of inhomogeneity materials. In radiosurgery using small field, we should be correct the inhomogeneity correction factor, more exactly.
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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Radiocirurgia / Elétrons Idioma: Coreano Revista: Korean Journal of Medical Physics Ano de publicação: 2009 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Radiocirurgia / Elétrons Idioma: Coreano Revista: Korean Journal of Medical Physics Ano de publicação: 2009 Tipo de documento: Artigo