Sökning: "histograms"

Visar resultat 21 - 25 av 80 uppsatser innehållade ordet histograms.

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

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Linnéa Strandell; [2020]
    Nyckelord :Medicine and Health Sciences;

    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

  3. 22. Image Distance Learning for Probabilistic Dose–Volume Histogram and Spatial Dose Prediction in Radiation Therapy Treatment Planning

    Master-uppsats, KTH/Matematisk statistik

    Författare :Ivar Eriksson; [2020]
    Nyckelord :Radiation therapy; automated planning; machine learning; autoencoder; distance optimisation; sparse pseudo-input Gaussian process; kernel density estimation; dose mimicking; dose–volume histogram; Strålbehandling; automatiserad dosplanering; maskininlärning; autoencoder; distansoptimering; glesa Gaussiska processer; sannolikhets-fördelnings-estimering; dosrekonstruktion; dos–volymhistogram;

    Sammanfattning : Construction of radiotherapy treatments for cancer is a laborious and time consuming task. At the same time, when presented with a treatment plan, an oncologist can quickly judge whether or not it is suitable. This means that the problem of constructing these treatment plans is well suited for automation. LÄS MER

  4. 23. Prokrastinera mindre och må bättre? : En studie av korrelationer mellan prokrastinering, self-compassion och livstillfredsställelse

    Kandidat-uppsats, Högskolan Kristianstad/Fakulteten för lärarutbildning

    Författare :Catharina Riedmüller; [2020]
    Nyckelord :Procrastination; Self-compassion; Life satisfaction; Correlation; Survey; Prokrastinering Self-compassion; Livstillfredsställelse; Korrelation; Enkätstudie;

    Sammanfattning : Den här studien har undersökt huruvida det föreligger något samband mellan prokrastinering, self-compassion och livstillfredsställelse. Det har även undersökts om studenter prokrastinerar i högre grad än de som arbetar. Studien har genomförts med en enkät som delats på internet och som till största delen spridits i Facebook-grupper. LÄS MER

  5. 24. Monte Carlo Simulations of Bowing Effects Using Realistic Fuel Data in Nuclear Fuel Assemblies

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad kärnfysik

    Författare :Marcus Westlund; [2019]
    Nyckelord :bowing effects; fuel assembly perturbations; nuclear; serpent; monte carlo;

    Sammanfattning : Deformations of nuclear fuel assemblies have been observed in nuclear power plants since the mid-90s. Such deformations are generally called bowing effects. LÄS MER

  7. 25. Automation of robust Pareto front-based radiotherapy treatment planning for prostate cancer patients

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Niklas Eliasson; [2019]
    Nyckelord :Medicine and Health Sciences;

    Sammanfattning : Purpose/objective The main objective was to create a software that automates the process of creating treatment plans used for Pareto front-based dose planning for prostate cancer patients. A second objective/purpose was to add a robustness test to this program to evaluate the effect of prostate movements on the treatment plans. LÄS MER