Search for dissertations about: "gel dosimetry"

Showing result 6 - 8 of 8 swedish dissertations containing the words gel dosimetry.

  2. 6. ESR dosimetry in the radiation therapy dose range : development of dosimetry systems and sensitive dosimeter materials

    Author : Sara Olsson; Bartolomieij Ciesielski; Linköpings universitet; []
    Keywords : MEDICINE; MEDICIN;

    Abstract : ESR dosimetry with L-α-alanine as a dosimeter material is a well known and frequently used method for measuring high absorbed doses, for example at sterilisation and food irradiation. The increased sensitivity of modem spectrometers and an increased knowledge of the radiochemical properties of alanine have lowered the detection limit of ESR/alanine dosimetry to the dose range relevant for radiation therapy. READ MORE

  4. 7. MRI evaluation and image processing in gel dosimetry. A study of selected MRI properties and image processing in 3D gel dosimetry

    Author : Peter Magnusson; Malmö Medicinsk strålningsfysik; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Klinisk fysiologi; medical instrumentation; tomography; radiology; Clinical physics; image registering; multi-slice; slice profile; ferrous sulphate; polyacrylamide; 3D volume acquisition; RF field; B1 field; relaxation time; T1; T2; spin-echo; multi-spin-echo; stochastic noise; nonuniformity; SNR; radiologi; tomografi; medicinsk instrumentering; Radiopharmaceutical technology; Radiofarmaceutisk teknik; Physics; Fysik;

    Abstract : Gel dosimetry is a new dosimetry method applied in radiation therapy. Gel dosimeters consist of a radiation sensitive gel, which can integrate absorbed doses from several radiation sources or beams. The dose to the gel can be evaluated by magnetic resonance imaging (MRI), a procedure that is the focus of the present thesis. READ MORE

  5. 8. Free radical dosimetry employing ESR spectroscopy for clinical use

    Author : Sara Olsson; Linköpings universitet; []
    Keywords : MEDICINE; MEDICIN;

    Abstract : In all radiation therapy treatment it is important to thoroughly determine the absorbed dose in the tumour, in surrounding normal tissue and in risk organs. The dose distributions are usually calculated by means of computerised dose-planning systems. READ MORE