Sökning: "pencil beam"

Visar resultat 1 - 5 av 17 avhandlingar innehållade orden pencil beam.

1. 1. Beam Modelling for Treatment Planning of Scanned Proton Beams

   Författare :Peter Kimstrand; Bengt Glimelius; Erik Traneus; Nina Tilly; Anders Ahnesjö; Thomas Bortfeld; Uppsala universitet; []
   Nyckelord :Radiation sciences; proton therapy; treatment planning; beam modelling; dose calculation; Monte Carlo; Strålningsvetenskap;

   Sammanfattning : Scanned proton beams offer the possibility to take full advantage of the dose deposition properties of proton beams, i.e. the limited range and sharp peak at the end of the range, the Bragg peak. LÄS MER

3. 2. Development of analytical transport methods for biologically optimized light ion therapy

   Författare :Johanna Kempe; Anders Brahme; Irena Gudowska; Naruhiri Matsufuji; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Radiotherapy; radiation quality; energy-range relations; light ion transport; pencil beam; Monte Carlo; Physics; Fysik; medicinsk strålningsfysik; Medical Radiation Physics;

   Sammanfattning : A general objective in the treatment of cancer is to eradicate the tumour cells without inducing severe complications in healthy normal tissue. The use of light ions for radiation therapy increases the possibility to deliver tumour suicidal doses with very low probability of normal tissue injury, not least in cases where the target is unresectable, radioresistant and located to near organs at risk. LÄS MER

4. 3. Development of a compact high energy treatment unit combining narrow pencil beam scanning and multileaf collimation

   Författare :Roger Svensson; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : .... LÄS MER

5. 4. Absorbed dose and biological effect in light ion therapy

   Författare :Malin Hollmark; Irena Gudowska; Oliver Jäkel; Stockholms universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Light ion therapy; absorbed dose calculation; analytical pencil beam model; Monte Carlo; radiobiological modeling; Radiological physics; Radiofysik; medicinsk strålningsfysik; Medical Radiation Physics;

   Sammanfattning : Radiation therapy with light ions improves treatment outcome for a number of tumor types. The advantageous dose distributions of light ion beams en-able exceptional target conformity, which assures high dose delivery to the tumor while minimizing the dose to surrounding normal tissues. LÄS MER

7. 5. Developing and evaluating dose calculation models for verification of advanced radiotherapy

   Författare :Jörgen Olofsson; Mikael Karlsson; Anders Ahnesjö; Crister Ceberg; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiation therapy; high-energy photons; dose calculation; multi-source model; pencil kernel; uncertainties; action levels; Radiological physics; Radiofysik;

   Sammanfattning : A prerequisite for modern radiotherapy is the ability to accurately determine the absorbed dose (D) that is given to the patient. The subject of this thesis has been to develop and evaluate efficient dose calculation models for high-energy photon beams delivered by linear accelerators. LÄS MER