title: Evaluation of the usefulness of a MOSFET detector in an anthropomorphic phantom for 6-MV photon beam.
abstract: In order to evaluate the usefulness of a metal oxide-silicon field-effect transistor (MOSFET) detector as a in vivo dosimeter, we performed in vivo dosimetry using the MOSFET detector with an anthropomorphic phantom. We used the RANDO phantom as an anthropomorphic phantom, and dose measurements were carried out in the abdominal, thoracic, and head and neck regions for simple square field sizes of 10 x 10, 5 x 5, and 3 x 3 cm(2) with a 6-MV photon beam. The dose measured by the MOSFET detector was verified by the dose calculations of the superposition (SP) algorithm in the XiO radiotherapy treatment-planning system. In most cases, the measured doses agreed with the results of the SP algorithm within +/-3%. Our results demonstrated the utility of the MOSFET detector for in vivo dosimetry even in the presence of clinical tissue inhomogeneities.
authors.affiliation: National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan. rkohno@east.ncc.go.jp
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Kohno
authors.forename: Eriko
authors.initials: E
authors.lastname: Hirano
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kitou
authors.forename: Tomonori
authors.initials: T
authors.lastname: Goka
authors.forename: Kana
authors.initials: K
authors.lastname: Matsubara
authors.forename: Satoru
authors.initials: S
authors.lastname: Kameoka
authors.forename: Taeko
authors.initials: T
authors.lastname: Matsuura
authors.forename: Takaki
authors.initials: T
authors.lastname: Ariji
authors.forename: Teiji
authors.initials: T
authors.lastname: Nishio
authors.forename: Mitsuhiko
authors.initials: M
authors.lastname: Kawashima
authors.forename: Takashi
authors.initials: T
authors.lastname: Ogino
mesh_terms: D006801:Humans; D010087:Oxides; D019047:Phantoms, Imaging; D017785:Photons; D011874:Radiometry / Q000295:instrumentation*; D012825:Silicon; D014173:Transistors, Electronic
chemical_list: D010087:Oxides; D012825:Silicon
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