Assessment of skin dose for breast chest wall radiotherapy as a function of bolus material

Shu-Hui Hsu, Peter L. Roberson, Yu Chen, Robin B. Marsh, Lori J. Pierce, Jean M. Moran

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Skin dose assessment for chest wall radiotherapy is important to ensure sufficient dose to the surface target volume without excessive skin reaction. This study quantified changes to the surface doses as a function of bolus material for conventional and intensity modulated radiation therapy (IMRT) tangential fields. Three types of bolus materials (2 mm solid, 2 mm fine mesh and 3.2 mm large mesh Aquaplast) were compared with Superflab. Surface dose measurements were performed using an Attix parallel plate chamber in a flat solid water phantom at 0°, 45° and 70° incident angles. Over-response correction factors were applied to the Attix chamber results for different incident angles. Surface dose measurements on an anthropomorphic phantom were done using a thermoluminescent dosimeter extrapolation method. Dose characteristics of Superflab and solid Aquaplast were within 2% of solid water material. No significant differences (within 3%) in the surface dose were found between conventional and IMRT tangential techniques. The bolus effect was large for chest wall tangential radiotherapy, with up to an 82% increase using 2 mm fine mesh Aquaplast. The dosimetric effect of different Aquaplast materials has been quantified in this work. These materials can be used to create a custom bolus with potentially better reproducibility of placement.

Original languageEnglish (US)
Pages (from-to)2593-2606
Number of pages14
JournalPhysics in Medicine and Biology
Volume53
Issue number10
DOIs
StatePublished - May 21 2008
Externally publishedYes

Fingerprint

Carboxymethylcellulose Sodium
chest
Radiotherapy
Thoracic Wall
breast
Dosimetry
radiation therapy
Skin
Breast
dosage
mesh
Water
Dosimeters
chambers
Extrapolation
parallel plates
water
dosimeters
extrapolation

ASJC Scopus subject areas

  • Biomedical Engineering
  • Physics and Astronomy (miscellaneous)
  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

Cite this

Assessment of skin dose for breast chest wall radiotherapy as a function of bolus material. / Hsu, Shu-Hui; Roberson, Peter L.; Chen, Yu; Marsh, Robin B.; Pierce, Lori J.; Moran, Jean M.

In: Physics in Medicine and Biology, Vol. 53, No. 10, 21.05.2008, p. 2593-2606.

Research output: Contribution to journalArticle

Hsu, Shu-Hui ; Roberson, Peter L. ; Chen, Yu ; Marsh, Robin B. ; Pierce, Lori J. ; Moran, Jean M. / Assessment of skin dose for breast chest wall radiotherapy as a function of bolus material. In: Physics in Medicine and Biology. 2008 ; Vol. 53, No. 10. pp. 2593-2606.
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