Sökning: "Collapsed Cone"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden Collapsed Cone.

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. Investigation of a Collapsed Cone Superposition Algorithm for dosimetry in brachytherapy

   Master-uppsats, Stockholms universitet/Fysikum

   Författare :Freja Alpsten; [2021]
   Nyckelord :Brachytherapy; Collapsed Cone; Model-Based Dose Calculation Algorithms; Radiotherapy;

   Sammanfattning : Background & Purpose: The current standard dosimetry in brachytherapy treatment planning, the TG-43 formalism, ignore the presence of non-water media and finite patient dimensions. This can cause clinically relevant errors in dose estimates. LÄS MER

4. 3. The Difference Between a Collapsed Cone Based and a Monte Carlo Based Dose Calculation Algorithm

   Master-uppsats, KTH/Fysik

   Författare :Victor Löf; [2015]
   Nyckelord :;

   Sammanfattning : .... LÄS MER

5. 4. Commissioning and validation of small subfields in Step-and-shoot IMRT

   Uppsats för yrkesexamina på grundnivå, Medicinsk strålningsfysik (tills m KI)

   Författare :Nils Andræ; [2008]
   Nyckelord :Radiotherapy Planning; Radiotherapy; Intensity-Modulated; IMRT; Commissioning; Small fields;

   Sammanfattning : One of the most used irradiation techniques in modern radiation therapy is step-and-shoot IMRT. The accuracy of this technique when delivering complex dose distributions strongly depends on the size of the subfields. LÄS MER

7. 5. 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