Sökning: "flattening filter free"

Hittade 4 uppsatser innehållade orden flattening filter free.

1. 1. Monte Carlo evaluation of static and dynamic 6FFF treatments - Evaluation of dose distributions calculated with AAA, Acuros XB, and Collapsed Cone (RayStation and DoseCheck)

   Master-uppsats,

   Författare :Alma Blombäck; [2023-02-23]
   Nyckelord :Medical physics; Monte Carlo; 6FFF; AAA; Acuros XB; DoseCheck; RayStation; DVH evaluation; flattening filter free;

   Sammanfattning : There are several benefits to removing the standard flattening filter and using so-called flattening filter free (FFF) treatments in external radiation therapy with photons. The main advantage is the possibility of significantly shortening the treatment time, de spite this FFF is not widely used yet. LÄS MER

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

   Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen; Lunds universitet/Medicinsk strålningsfysik, Lund

   Författare :Minna Ahlström; [2015]
   Nyckelord :Medicine and Health Sciences;

   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

4. 3. Characteristics of a Flattening Filter Free Photon Beam – Measurements and Monte Carlo Simulations

   Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

   Författare :Mårten Lind; [2008]
   Nyckelord :Strålterapi; Medicine and Health Sciences;

   Sammanfattning : Introduction: In conventional medical linear accelerators, the flattening filter is introduced in the photon beam line to provide a uniform lateral dose profile at a specified depth in water. For some radiotherapy treatments, e.g. intensity modulated radiotherapy, a flat radiation field is not necessary and the flattening filter could be removed. LÄS MER

5. 4. Dose Calculation Accuracy for a Flattening-Filter Free Photon Beam Implemented into Oncentra MasterPlan

   Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

   Författare :Sacha af Wetterstedt; [2008]
   Nyckelord :Strålterapi; Medicine and Health Sciences;

   Sammanfattning : "Introduction For IMRT treatments, removing the flattening filter could be beneficial, as it would decrease the beam-on time required for delivering a certain dose. The aim of this work has been to assess the calculation accuracy obtained when implementing flattening filter free beam data into the treatment planning system Oncentra MasterPlan. LÄS MER