Essays about: "vmat"

Showing result 1 - 5 of 10 essays containing the word vmat.

1. 1. Radiotherapy treatment strategy for prostate cancer with lymph node involvement

   University essay from Umeå universitet/Institutionen för fysik

   Author : Amanda Östensson; [2023]
   Keywords : Radiotherapy; prostate cancer; lymph node; gold fiducial marker; multiple target;

   Abstract : Radiotherapy is a common and useful method for treating prostate cancer, often using gold fiducial markers in the prostate as guidance. However, when there is a high risk of lymph node involvement, the independent motion of volumes causes complications in patient positioning since there is a choice between position against the gold fiducial markers or the bone anatomy. READ MORE

3. 2. COMPARISON OF MULTI-CRITERIA OPTIMIZATION IN TWO DIFFERENT TREATMENT PLANNING SYSTEMS

   University essay from

   Author : Anna Lindström; [2021-05-10]
   Keywords : Medical physics; Multi-criteria optimization; Pareto front; volumetric modulated arc therapy; head and neck cancer; prostate cancer;

   Abstract : 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). READ MORE

4. 3. Impact of MLC shape smoothing on VMAT plan complexity and agreement between planned and delivered dose

   University essay from Lunds universitet/Sjukhusfysikerutbildningen

   Author : Linnéa Strandell; [2020]
   Keywords : Medicine and Health Sciences;

   Abstract : 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. READ MORE

5. 4. Utilizing the Degrees of Freedom in Radiation Therapy Optimization

   University essay from KTH/Optimeringslära och systemteori

   Author : Henrik Olsson; [2017]
   Keywords : ;

   Abstract : 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. READ MORE

6. 5. Flattening filter free volumetric modulated arc therapy for extreme hypofractionation of prostate cancer - Decreasing the treatment time and reducing the impact of prostate motion

   University essay from Lunds universitet/Sjukhusfysikerutbildningen; Lunds universitet/Medicinsk strålningsfysik, Lund

   Author : Minna Ahlström; [2015]
   Keywords : Medicine and Health Sciences;

   Abstract : 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. READ MORE