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Multileaf collimation of electrons-clinical effects on electron energy modulation and mixed beam therapy depending on treatment head design
Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper, Radiofysik.
Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper, Radiofysik.
Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper, Onkologi.
Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper, Radiofysik.
2002 (engelsk)Inngår i: Physics in Medicine and Biology, ISSN 0031-9155, E-ISSN 1361-6560, Vol. 47, nr 7, s. 1013-1024Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The aim Of this Study was to explore the possibilities of using multileaf-collimated electron beams for advanced radiation therapy with conventional scattering foil flattened beams. Monte Carlo simulations were performed with the aim to improve electron beam characteristics and enable isocentric multileaf collimation. The scattering foil positions, monitor chamber thickness, the MLC location and the amount of He in the treatment head were optimized for three common commercial accelerators. The performance of the three optimized treatment head designs was compared for different SSDs in air. at treatment depth in water and for some clinical cases. The effects of electron/photon beam matching including generalized random and static errors using Gaussian one-dimensional (1D) error distributions, and also electron energy modulation, were studied at treatment depth in beater, The modification of the treatment heads improved the electron beam characteristics and enabled the use of multileaf collimation in isocentric delivery of both electron and photon beams in a mixed beam IMRT procedure.

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2002. Vol. 47, nr 7, s. 1013-1024
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URN: urn:nbn:se:umu:diva-39941ISI: 000175285100003OAI: oai:DiVA.org:umu-39941DiVA, id: diva2:396902
Tilgjengelig fra: 2011-02-11 Laget: 2011-02-11 Sist oppdatert: 2018-06-08

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