Sökning: "radiation therapy planning"

Visar resultat 16 - 20 av 73 avhandlingar innehållade orden radiation therapy planning.

  1. 16. Optimization of radiation therapy planning using physical and biological objective functions

    Författare :Patric Källman; Stockholms universitet; []
    Nyckelord :Radiation Physics; radiofysik;

    Sammanfattning : The aim of radiation therapy is to eradicate all clonogenic tumour cells without causing severeinjury in normal tissues. Optimization of treatment planning means finding the most preferabletreatment prescription. During the recent years new methods for optimization that aim at solving theinverse problem in radiation therapy have been developed. LÄS MER

  3. 17. Dosimetry and radiation quality in fast-neutron radiation therapy : A study of radiation quality and basic dosimetric properties of fast-neutrons for external beam radiotherapy and problems associated with corrections of measured charged particle cross-sections

    Författare :Jonas Söderberg; Gudrun Alm Carlsson; Crister Ceberg; Linköpings universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Neutron; Dosimetry; Radiotherapy; Monte Carlo; Microdosimetry; Cross-section; RBE; LET; Energy-loss corrections; Radiological physics; Radiofysik;

    Sammanfattning : The dosimetric properties of fast-neutron beams with energies ≤80 MeV were explored using Monte Carlo techniques. Taking into account transport of all relevant types of released charged particles (electrons, protons, deuterons, tritons, 3He and α particles) pencil-beam dose distributions were derived and used to calculate absorbed dose distributions. LÄS MER

  4. 18. Development and application of composite energy deposition kernels for photon therapy planning

    Författare :Anders Eklöf; Simo Hyödynmaa; Stockholms universitet; []
    Nyckelord :Energy deposition kernels; volume overlap algorithm; radiotherapy planning; photon pencil beams; treatment optimization; biological treatment objectives; medicinsk strålningsfysik; Medical Radiation Physics;

    Sammanfattning : In recent years, the use of optimization algorithms in radiation therapy planning has increased dramatically. All optimization algorithms as well as most modern implementations of conventional therapy planning, use energy deposition kernels as a fundamental part of the calculations. LÄS MER

  5. 19. Radiation therapy planning and optimization studied as inverse problems

    Författare :Bengt K. Lind; Stockholms universitet; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  7. 20. Relative biological effectiveness in proton therapy: accounting for variability and uncertainties

    Författare :Jakob Ödén; Iuliana Toma-Dasu; Kjell Eriksson; Radhe Mohan; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; proton therapy; relative biological effectiveness; linear energy transfer; proton track-end optimisation; radiation-induced toxicity; Medical Radiation Physics; medicinsk strålningsfysik;

    Sammanfattning : Radiation therapy is widely used for treatments of malignant diseases. The search for the optimal radiation treatment approach for a specific case is a complex task, ultimately seeking to maximise the tumour control probability (TCP) while minimising the normal tissue complication probability (NTCP). LÄS MER