Dosimeter gel and MR imaging for verification of calculated dose distributions in clinical radiation therapy

S A Johansson, P Magnusson, A Fransson, L E Olsson, J O Christoffersson, A Montelius, S Mattsson

Research output: Contribution to journalArticlepeer-review

24 Citations (SciVal)

Abstract

A dosimeter gel, based on an agarose gel infused with a ferrous sulphate solution and evaluated in a magnetic resonance scanner, was used for complete verification of calculated dose distributions. Two standard treatment procedures, treatment of cancer in the urinary bladder and treatment of breast cancer after modified radical mastectomy, were examined using pixel-by-pixel and dose volume histogram comparison. The dose distributions calculated with the dose planning system was in very good agreement with the measured ones. However, in the case of the more complicated breast cancer treatment, some discrepancies were found, mainly at the beam abutment region. This may be explained by field displacements errors and by a small limitation of the dose planning utilising small electron beams in this region. The dosimeter gel system have proven to be a useful tool for dosimetry in clinical radiation therapy applications.

Original languageEnglish
Pages (from-to)283-90
Number of pages8
JournalActa Oncologica
Volume36
Issue number3
Publication statusPublished - 1997

Subject classification (UKÄ)

  • Radiology, Nuclear Medicine and Medical Imaging

Keywords

  • Breast Neoplasms
  • Ferrous Compounds
  • Gels
  • Magnetic Resonance Imaging
  • Phantoms, Imaging
  • Radiometry
  • Radiotherapy Dosage
  • Radiotherapy Planning, Computer-Assisted
  • Urinary Bladder Neoplasms

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