Sökning: "Proton Grid Therapy"

Hittade 2 uppsatser innehållade orden Proton Grid Therapy.

1. 1. Spatial Frequency-Based Objective Function for Optimization of Dose Heterogeneity in Grid Therapy

   Kandidat-uppsats, Stockholms universitet/Fysikum

   Författare :Fredén Emil; [2019]
   Nyckelord :Radiotherapy; Dose Optimization; Objective function; Dose Heterogeneity; Proton Grid Therapy; Spatially Fractionated Radiotherapy; SFRT;

   Sammanfattning : In this project we introduced a spatial frequency-based objective function for optimization of dose distributions used in spatially fractionated radiotherapy (also known as grid therapy). Several studies indicate that tissues can tolerate larger mean doses of radiation if the dose is delivered heterogeneously or to a partial volume of the organ. LÄS MER

3. 2. Ray Cast/Dose Superposition algorithm for proton grid therapy

   Master-uppsats, Stockholms universitet/Medicinsk strålningsfysik (tills m KI)

   Författare :Tibor Marusic; [2017]
   Nyckelord :Proton Grid Therapy Treatment Radiation Dose Distribution Superpositioning Interlace Planning System Volume Effect Ray Cast Algorithm Medical Trace Plan Program Python Computer Tomography Volume Of Interest;

   Sammanfattning : Purpose: To develop a Ray Cast/Dose Superposition (RC/DS) algorithm for proton grid therapy. Its functionality needed to include automatic positioning of small proton pencil beams in a grid-pattern and superimposing thin beam Monte Carlo (MC) dose distribution data on a Computer Tomography (CT) density volume. LÄS MER