Sökning: "volumetric modulated arc therapy"
Visar resultat 1 - 5 av 8 uppsatser innehållade orden volumetric modulated arc therapy.
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
2. Impact of MLC shape smoothing on VMAT plan complexity and agreement between planned and delivered doseMaster-uppsats, Lunds universitet/Sjukhusfysikerutbildningen
Sammanfattning : Background/Purpose: The aperture shape controller (ASC) was introduced in the Eclipse treatment planning system to reduce plan complexity by counteracting irregular multileaf collimator (MLC) shapes. This should lead to decreased difference between the planned and measured dose distribution. LÄS MER
- Master-uppsats, KTH/Matematisk statistik
Sammanfattning : In radiation therapy treatment planning, recent works have used machine learning based on historically delivered plans to automate the process of producing clinically acceptable plans. Compared to traditional approaches such as repeated weighted-sum optimization or multicriteria optimization (MCO), automated planning methods have, in general, the benefits of low computational times and minimal user interaction, but on the other hand lack the flexibility associated with general-purpose frameworks such as MCO. LÄS MER
- Master-uppsats, KTH/Optimeringslära och systemteori
Sammanfattning : The development of advanced software for radiation therapy treatment has had a significant role in the last decades’ improvements in cancer treatment. By optimizing the radiation dose given to each patient, the probability of a successful treatment increases. LÄS MER
5. Flattening filter free volumetric modulated arc therapy for extreme hypofractionation of prostate cancer - Decreasing the treatment time and reducing the impact of prostate motionMaster-uppsats, Lunds universitet/Sjukhusfysikerutbildningen; Lunds universitet/Medicinsk strålningsfysik, Lund
Sammanfattning : Purpose: This work examined the feasibility of flattening filter free (FFF) volumetric modulated arc therapy (VMAT) for extreme hypofractionation of prostate cancer. The aim was to investigate the potential gain in treatment time per fraction for extreme hypofractionation of prostate cancer, while preserving or improving the treatment plan quality and radiation delivery quality. LÄS MER