Modelling simple helically delivered dose distributions

John D. Fenwick, Wolfgang A. Tomé, Michael W. Kissick, T. Rock Mackie

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)1505-1517
Number of pages13
JournalPhysics in Medicine and Biology
Issue number7
StatePublished - Apr 7 2005
Externally publishedYes

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging


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