Sökning: "dual energy computed tomography"
Visar resultat 1 - 5 av 14 uppsatser innehållade orden dual energy computed tomography.
1. Improving proton therapy planning with photon-counting spectral computed tomography
Master-uppsats, KTH/FysikSammanfattning : 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
2. Assessment of hip deformities during childhood: a combined approach of Machine Learning and Finite Element Analysis
Master-uppsats, Lunds universitet/Avdelningen för Biomedicinsk teknikSammanfattning : Osteoarthritis is a degenerative disease that will cause pain and stiffness in the joint if not treated. One cause of early osteoarthritis in the hip joint is pediatric hip deformities. Hip deformities can occur in different stages of childhood and cause the bones to be misshapen or the hip joint to be dislocated. LÄS MER
3. Material decomposition using a photon counting X-ray detector in low energy range
Master-uppsats, Lunds universitet/SjukhusfysikerutbildningenSammanfattning : 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. Iodine Quantification Using Dual Energy Computed Tomography and applications in Brain Imaging
Master-uppsats, Lunds universitet/SjukhusfysikerutbildningenSammanfattning : 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
5. Dual Energy CT as a Foundation for Proton Therapy Treatmen Planning - A pilot study
Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysikSammanfattning : The treatment plan for radiation therapy with protons is based on images from a computed tomography (CT) scanner. This is problematic since the photons in the x-ray beam from the CT scanner and the protons are affected differently by the tissue in the patient, which introduce an uncertainty in the track length of the protons. LÄS MER
