Sökning: "fluensoptimering"

Hittade 1 uppsats innehållade ordet fluensoptimering.

  1. 1. Direct optimization of dose-volume histogram metrics in intensity modulated radiation therapy treatment planning

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Tianfang Zhang; [2018]
    Nyckelord :Optimization; intensity-modulated radiation therapy; DVH functions; dose-at-volume; volume-at-dose; value-at-risk; smooth approximation; kernel density estimation; fluence map optimization; Optimering; intensitetsmodulerad strålterapi; DVH-funktioner; dose-at-volume; volumeat- dose; value-at-risk; slätapproximation; ickeparametrisk skattning; fluensoptimering;

    Sammanfattning : In optimization of intensity-modulated radiation therapy treatment plans, dose-volumehistogram (DVH) functions are often used as objective functions to minimize the violationof dose-volume criteria. Neither DVH functions nor dose-volume criteria, however,are ideal for gradient-based optimization as the former are not continuously differentiableand the latter are discontinuous functions of dose, apart from both beingnonconvex. LÄS MER