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Träfflista för sökning "WFRF:(Mattsson S) srt2:(1995-1999)"

Sökning: WFRF:(Mattsson S) > (1995-1999)

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  • Bäck, S A, et al. (författare)
  • Verification of single beam treatment planning using a ferrous dosimeter gel and MRI (FeMRI)
  • 1998
  • Ingår i: Acta Oncologica. - 0284-186X. ; 37:6, s. 6-561
  • Tidskriftsartikel (refereegranskat)abstract
    • A method for analysing and comparing treatment planning system (TPS) data and ferrous dosimeter gel measurements evaluated with MRI (FeMRI) was developed, including image processing to final absorbed dose images. Measurements were analysed according to this method and FeMRI data were thereby compared with the TPS-calculated dose distribution. For photons, differences between FeMRI- and TPS dose data were mainly within +/- 2%. Minor shortcomings found in both the FeMRI system and the TPS are explained and discussed. For electron beams, there was an overall good agreement. It was found that the TPS underestimates the lateral scattering dose outside the primary beam, but the reported dose difference corresponds to a small spatial deviation (less than 2 mm). It is important to consider this single beam data comparison when the method is extended to more complicated situations, for example when using several beams.
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  • Johansson, S A, et al. (författare)
  • Dosimeter gel and MR imaging for verification of calculated dose distributions in clinical radiation therapy
  • 1997
  • Ingår i: Acta Oncologica. - 0284-186X. ; 36:3, s. 90-283
  • Tidskriftsartikel (refereegranskat)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.
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