Sökning: "OARS"
Visar resultat 1 - 5 av 19 uppsatser innehållade ordet OARS.
1. Design och konstruktion av åror till snipa : Tillämpning av Design For Six Sigma
M1-uppsats, Linnéuniversitetet/Institutionen för maskinteknik (MT)Sammanfattning : The oar has historically played a significant role for Sweden as a lake andcostal dominated country. For many years small boats called “snipa” wereused to gather fish by people living along the coastlines or alongside lakes.Oars was then the only option for conveying the boat forward. LÄS MER
2. STANDARDIZED ORGAN AT RISK VOLUME FOR EXTERNAL BEAM RADIATION THERAPY IN PROSTATE CANCER AND ITS RELATIONSHIP TO VOLUMES DEFINED BY CLINICAL PRACTICE
Master-uppsats,Sammanfattning : Background/ Purpose: In radiation therapy (RT), the radiation dose calculated in tumours and normal tissue depends on how the volumes are defined. It is difficult to standardize how tumour volumes should be defined because their anatomical extension can differ greatly between individuals. LÄS MER
3. " Optimization of Margins and Plan Robustness for Proton Therapy of Hodgkin’s Lymphoma"
Master-uppsats, Lunds universitet/SjukhusfysikerutbildningenSammanfattning : Purpose/Background: Utilizing proton therapy (PT) for treatment of Hodgkin’s lymphoma (HL) has demonstrated favorable features, particularly a reduced dose to organs at risk (OAR) in comparison with photon radiotherapy. However, there is a coherent complexity with PT including its uncertainties, such as range-uncertainties and set-up variations as protons are highly sensitive to tissue density variations within the beam-path. LÄS MER
4. Surface Guided Helical Tomotherapy for Total Marrow Irradiation
Master-uppsats, Lunds universitet/SjukhusfysikerutbildningenSammanfattning : Background: Total marrow irradiation (TMI) with helical tomotherapy treatment (HT-TMI) can be used as conditioning regimen for leukemia patients prior to stem cell transplantation by radiating the skeletal tissue. To ensure adequate dose coverage a margin is applied to the clinical target volume (CTV), i.e. planning target volume (PTV) margin. LÄS MER
5. COMPARISON OF MULTI-CRITERIA OPTIMIZATION IN TWO DIFFERENT TREATMENT PLANNING SYSTEMS
Master-uppsats,Sammanfattning : Purpose: The purpose with this study was to compare multi-criteria optimization (MCO) for volumetric modulated arc therapy (VMAT) treatment plans in two different treatment planning systems. Theory: When performing treatment planning prior to radiation therapy it is important to prioritize between absorbed dose to target and absorbed dose to organs at risk (OAR). LÄS MER