title: A convolution/superposition method using primary and scatter dose kernels formed for energy bins of X-ray spectra reconstructed as a function of off-axis distance: comparison of calculated and measured 10-MV X-ray doses in thorax-like phantoms.
abstract: We performed experimental studies on the convolution/superposition method reported in the former companion paper (Iwasaki in Radiol Phys Technol 4, 2011) using 10-MV X-ray beams from open-jaw-collimated fields. The method uses primary and scatter dose kernels formed for energy bins of X-ray spectra reconstructed as a function of off-axis distance. We made a comparison of calculations and measurements in water phantoms and thorax-like phantoms with respect to percentage depth dose curves, tissue-phantom ratio curves, and dose profiles. We made the dose calculation by taking into account the beam-hardening effect with depth and the off-axis radiation-softening effect. We found that the method could be used, in general, for performing accurate dose calculations.
authors.affiliation: Department of Radiology, Aomori City Hospital, 1-14-20 Katta, Aomori, Japan. rad_rtp_aomori@msb.biglobe.ne.jp
authors.forename: Shigenobu
authors.initials: S
authors.lastname: Kimura
authors.forename: Kohji
authors.initials: K
authors.lastname: Sutoh
authors.forename: Kazuo
authors.initials: K
authors.lastname: Kamimura
authors.forename: Akira
authors.initials: A
authors.lastname: Iwasaki
authors.forename: Makoto
authors.initials: M
authors.lastname: Sasamori
authors.forename: Fumio
authors.initials: F
authors.lastname: Komai
authors.forename: Morio
authors.initials: M
authors.lastname: Seino
authors.forename: Singo
authors.initials: S
authors.lastname: Terashima
authors.forename: Mamoru
authors.initials: M
authors.lastname: Kubota
authors.forename: Junichi
authors.initials: J
authors.lastname: Hirota
authors.forename: Yoichiro
authors.initials: Y
authors.lastname: Hosokawa
mesh_terms: D000465:Algorithms; D000818:Animals; D006801:Humans; D019047:Phantoms, Imaging; D013902:Radiography, Thoracic / Q000295:instrumentation / Q000379:methods*; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy / Q000295:instrumentation / Q000379:methods*; D012542:Scattering, Radiation; D014867:Water / Q000737:chemistry; D014965:X-Rays
chemical_list: D014867:Water