Modelling simple helically delivered dose distributionsThis work was funded by NIH grant P01 CA088960.
D Fenwick, John; A Tomé, Wolfgang; Kissick, Michael W; Rock Mackie, T; D Fenwick, John; Department of Human Oncology, University of Wisconsin–Madison, 600 Highland Avenue, Madison, WI 53792, USA; Department of Medical Physics, University of Wisconsin–Madison, 1300 University Avenue, Madison, WI 53706, USA; Address for correspondence: Physics Department, Clatterbridge Centre for Oncology, Clatterbridge Road, Bebington, Wirral CH63 4JY, UK; A Tomé, Wolfgang; Department of Human Oncology, University of Wisconsin–Madison, 600 Highland Avenue, Madison, WI 53792, USA; Department of Medical Physics, University of Wisconsin–Madison, 1300 University Avenue, Madison, WI 53706, USA; Kissick, Michael W; Department of Medical Physics, University of Wisconsin–Madison, 1300 University Avenue, Madison, WI 53706, USA; Rock Mackie, T; Department of Human Oncology, University of Wisconsin–Madison, 600 Highland Avenue, Madison, WI 53792, USA; Department of Medical Physics, University of Wisconsin–Madison, 1300 University Avenue, Madison, WI 53706, USA; Tomotherapy Incorporated, 1240 Deming Way, Madison, WI 53717, USA
Журнал:
Physics in Medicine and Biology
Дата:
2005-04-07
Аннотация:
In a previous paper, we described quality assurance procedures for Hi-Art helical tomotherapy machines. Here, we develop further some ideas discussed briefly in that paper. Simple helically generated dose distributions are modelled, and relationships between these dose distributions and underlying characteristics of Hi-Art treatment systems are elucidated. In particular, we describe the dependence of dose levels along the central axis of a cylinder aligned coaxially with a Hi-Art machine on fan beam width, couch velocity and helical delivery lengths. The impact on these dose levels of angular variations in gantry speed or output per linear accelerator pulse is also explored.
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