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Determination of Phantom Scatter Factors for Small Photon Fields / 의학물리
Korean Journal of Medical Physics ; : 106-111, 2009.
Artigo em Coreano | WPRIM | ID: wpr-115851
ABSTRACT
Total scatter factor (Scp), head scatter factor (Sc) and phantom scatter factor (Sp) are very important for accurate radiation therapy at stereotactic radiosurgery (SRS) with irregular field shape using micro-MLC and intensity modulated radiation therapy (IMRT) including many small field sizes. In this study we measured and compared Scp with reference ion chamber, pinpoint chamber and diode detector and adapted the resuls form diode detector. Head scatter factors for small field sizes were also measured with diode detector covered 1.5 cm-thick solid water build-up cap. Some errors like as electron contamination of 1~3% were included in the values of Sc but trend of total results of Sc was coincided with basic theory. Phantom scatter factors for small field sizes were calculated form Scp and Sc. The results of Sp were compared and were well-agreed with those of other authors.
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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Água / Radiocirurgia / Fator de Crescimento de Hepatócito / Elétrons / Cabeça 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: Água / Radiocirurgia / Fator de Crescimento de Hepatócito / Elétrons / Cabeça Idioma: Coreano Revista: Korean Journal of Medical Physics Ano de publicação: 2009 Tipo de documento: Artigo