Sökning: "PTV margin"
Visar resultat 1 - 5 av 12 uppsatser innehållade orden PTV margin.
1. 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
2. Evaluation of margins and plan robustness for proton therapy of unilateral tonsil cancer.
Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik; Umeå universitet/Institutionen för strålningsvetenskaperSammanfattning : During proton therapy both target volumes and healthy tissue, including organs at risk (OARs), receives radiation dose. Thus, radiotherapy is a trade-off between good target coverage and OAR sparing. For protons, most of the dose is deposited right before it is stopped, a phenomenon termed the Bragg peak. LÄS MER
3. Feasibility of adaptive SBRT of prostate cancer: Investigating uncertainties in AI-driven and CBCT-guided online adaptive radiotherapy
Master-uppsats, Lunds universitet/SjukhusfysikerutbildningenSammanfattning : Purpose: Recent developments in external radiotherapy and its utilization with artificial in- telligence (AI) enables advanced treatment plans for a range of different disease sites. By adapting to the anatomy of the day, target coverage can be ensured while sparing more healthy tissue. LÄS MER
4. Analysis of bladder cancer treatment plans generated for online adaptive radiotherapy and validation of an integrated independent dose calculation software
Master-uppsats, Lunds universitet/SjukhusfysikerutbildningenSammanfattning : Purpose: In 2019 Varian EthosTM linear accelerator (Varian Medical Systems, CA, USA) with integrated artificial intelligence (AI) was installed at Herlev Hospital, Copenhagen, Denmark, enabling online adaptive radiotherapy (oART) e.g for bladder cancer patients with a large margin reduction. LÄS MER
5. New potential treatment protocol for radiotherapy of glioblastoma
Master-uppsats, Lunds universitet/SjukhusfysikerutbildningenSammanfattning : Purpose: Improvements in mortality rate of glioblastoma patients have been limited during the past decades, due to the tumor’s rapidly growing and infiltrative behavior and resistance to current therapy. Recent findings show that higher brain mean dose strongly correlates with inferior overall survival and that local recurrences mainly occur centrally in previously irradiated regions. LÄS MER
