Technical note: Heterogeneity dose calculation accuracy in IMRT: Study of five commercial treatment planning systems using an anthropomorphic thorax phantom

Scott E. Davidson, Richard A. Popple, Geoffrey S. Ibbott, David S. Followill

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

The purpose of this study was to determine the accuracy of five commonly used intensity-modulated radiation therapy (IMRT) treatment planning systems (TPSs), 3 using convolution superposition algorithms or the analytical anisotropic algorithm (CSA/AAAs) and 2 using pencil beam algorithms (PBAs), in calculating the absorbed dose within a low-density, heterogeneous region when compared with measurements made in an anthropomorphic thorax phantom. The dose predicted in the target center met the test criteria (5% of the dose normalization point or 3 mm distance to agreement) for all TPSs tested; however, at the tumor-lung interface and at the peripheral lung in the vicinity of the tumor, the CSA/AAAs performed better than the PBAs (85% and 50%, respectively, of pixels meeting the 5%/3-mm test criteria), and thus should be used to determine dose in heterogeneous regions.

Original languageEnglish (US)
Pages (from-to)5434-5439
Number of pages6
JournalMedical Physics
Volume35
Issue number12
DOIs
StatePublished - 2008
Externally publishedYes

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Radiotherapy
Thorax
Therapeutics
Lung
Neoplasms

Keywords

  • Anthropomorphic phantom
  • Film
  • Heterogeneity dose calculation
  • Measurement
  • TLD

ASJC Scopus subject areas

  • Biophysics
  • Radiology Nuclear Medicine and imaging

Cite this

Technical note : Heterogeneity dose calculation accuracy in IMRT: Study of five commercial treatment planning systems using an anthropomorphic thorax phantom. / Davidson, Scott E.; Popple, Richard A.; Ibbott, Geoffrey S.; Followill, David S.

In: Medical Physics, Vol. 35, No. 12, 2008, p. 5434-5439.

Research output: Contribution to journalArticle

Davidson, Scott E. ; Popple, Richard A. ; Ibbott, Geoffrey S. ; Followill, David S. / Technical note : Heterogeneity dose calculation accuracy in IMRT: Study of five commercial treatment planning systems using an anthropomorphic thorax phantom. In: Medical Physics. 2008 ; Vol. 35, No. 12. pp. 5434-5439.
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