Sökning: "dual energy datortomografi"

Hittade 3 uppsatser innehållade orden dual energy datortomografi.

1. 1. Improving proton therapy planning with photon-counting spectral computed tomography

   Master-uppsats, KTH/Fysik

   Författare :Karin Larsson; [2023]
   Nyckelord :Proton therapy; Medical imaging; Computed Tomography; Protonterapi; Medicinsk avbildning; Datortomografi;

   Sammanfattning : Proton radiation therapy is an alternative to conventional photon radiation therapy, which accounts for the majority of radiation treatments today. The rationale for using protons in radiation therapy lies in their dose deposition properties; photons deposit a radiation dose inversely proportional to the energy, and therefore tissue depth, while protons exhibit a sharp Bragg peak when traversing matter. LÄS MER

3. 2. Material decomposition using a photon counting X-ray detector in low energy range

   Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

   Författare :Rasmus Solem; [2021]
   Nyckelord :Medicine and Health Sciences;

   Sammanfattning : Material decomposition in X-ray imaging is used to separate different materials or elements in an image and to quantify their respective concentration. The material decomposition and quantification are made possible by the dependency of attenuation on the attenuating material and photon energy. LÄS MER

4. 3. Iodine Quantification Using Dual Energy Computed Tomography and applications in Brain Imaging

   Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

   Författare :Veronica Fransson; [2019]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : Purpose/Background Dual Energy Computed Tomography (DECT) have been clinically available for over ten years. Two such systems are currently used at Skane University Hospital (SUS) in Lund. By utilizing materials different attenuating properties at different energies, material decomposition and iodine quantification is possible. LÄS MER