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- W1978103445 abstract "We completed an implementation of pencil-beam scanning (PBS), a technology whereby a focused beam of protons, of variable intensity and energy, is scanned over a plane perpendicular to the beam axis and in depth. The aim of radiotherapy is to improve the target to healthy tissue dose differential. We illustrate how PBS achieves this aim in a patient with a bulky tumor.Our first deployment of PBS uses broad pencil-beams ranging from 20 to 35 mm (full-width-half-maximum) over the range interval from 32 to 7 g/cm(2). Such beam-brushes offer a unique opportunity for treating bulky tumors. We present a case study of a large (4,295 cc clinical target volume) retroperitoneal sarcoma treated to 50.4 Gy relative biological effectiveness (RBE) (presurgery) using a course of photons and protons to the clinical target volume and a course of protons to the gross target volume.We describe our system and present the dosimetry for all courses and provide an interdosimetric comparison.The use of PBS for bulky targets reduces the complexity of treatment planning and delivery compared with collimated proton fields. In addition, PBS obviates, especially for cases as presented here, the significant cost incurred in the construction of field-specific hardware. PBS offers improved dose distributions, reduced treatment time, and reduced cost of treatment." @default.
- W1978103445 created "2016-06-24" @default.
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- W1978103445 date "2010-02-01" @default.
- W1978103445 modified "2023-10-01" @default.
- W1978103445 title "A Case Study in Proton Pencil-Beam Scanning Delivery" @default.
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- W1978103445 doi "https://doi.org/10.1016/j.ijrobp.2009.06.065" @default.
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