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Microdosimetric comparison of scanned and conventional proton beams used in radiation therapy. 2011
John F Dicello, and
Bradford B Gersey, and
Daila S Gridley, and
George B Coutrakon, and
David Lesyna, and
Vincent L Pisacane, and
James B Robertson, and
Reinhard W Schulte, and
Jerry D Slater, and
Andrew J Wroe, and
James M Slater
Department of Radiation Medicine, Loma Linda University Medical Center, 25 Westminster Bridge Way, Timonium, MD, USA. dicello@usna.edu
Multiple groups have hypothesised that the use of scanning beams in proton therapy will reduce the neutron component of secondary radiation in comparison with conventional methods with a corresponding reduction in risks of radiation-induced cancers. Loma Linda University Medical Center (LLUMC) has had FDA marketing clearance for scanning beams since 1988 and an experimental scanning beam has been available at the LLUMC proton facility since 2001. The facility has a dedicated research room with a scanning beam and fast switching that allows its use during patient treatments. Dosimetric measurements and microdosimetric distributions for a scanned beam are presented and compared with beams produced with the conventional methods presently used in proton therapy.
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