Sökning: "Tomography"

Visar resultat 1 - 5 av 375 uppsatser innehållade ordet Tomography.

  1. 1. osimetric impact of system spe cific geometric distortion on head and neck treatment plans in MRI only based radiation therapy

    Master-uppsats,

    Författare :Jesper Brovall; [2022-01-13]
    Nyckelord :Medical physics; Dosimetry; MRI; Radiation therapy;

    Sammanfattning : Background/purpose:Because of the superior soft tissue contrast, in comparison withcomputed tomography (CT) data, magnetic resonance imaging(MRI) is of high interest to include in a larger extent in the ra diation therapy (RT) process. In an MRI only workflow, the CTscan is excluded and a synthetic CT is used for treatment plan ning. LÄS MER

  2. 2. MIGRATION OF FLUID DURING DEFORMATION OF MOLTEN DEUTRATED ICE USING 3D IMAGE ANALYSIS

    Master-uppsats, Göteborgs universitet/Institutionen för geovetenskaper

    Författare :Uzochukwu Damian Akwuba; [2021-09-14]
    Nyckelord :Ice; Deformation; Tomography; Fluid Migration; Fractures;

    Sammanfattning : The behaviour of in ltrating and intergranular uid in an ice body is essential inunderstanding the deection of the glacier body. The movement of the uid duringdeformation is most naturally controlled by compressive stress and temperature gradientwhich is important in understanding the behaviour of the glacier body. LÄS MER

  3. 3. Typiska skador relaterade till barnmisshandel, Vid konventionell och DT-röntgen

    Kandidat-uppsats,

    Författare :Dalal Fakhruldeen; Alaa Saadi; [2021-06-08]
    Nyckelord :Child abuse; Skeletal survey; fractures; Radiology; Radiographer; Radiography; computed tomography;

    Sammanfattning : Bakgrund: Barnmisshandel är ett samhällsproblem som har ökat över tiden, och kan vara fysiskt, psykiskt eller sexuellt. Den fysiska misshandeln innefattar oftast skelett- och hjärnskador vilka utreds med hjälp av röntgenundersökning. LÄS MER

  4. 4. EVALUATION OF RADIATION DOSES USING CONE BEAM COMPUTED TOMOGRAPHY IN ENDOVASCULAR AORTIC REPAIR AND SCOLIOSIS PROCEDURES

    Master-uppsats,

    Författare :Louise Strandberg; [2021-04-06]
    Nyckelord :Medical physics; Cone beam CT; CT; EVAR; scoliosis; radiation dose; effective dose;

    Sammanfattning : Purpose: The study includes the two areas, vascular surgery and orthopedics, and focuses on endovascular aortic aneurysm repair (EVAR) and scoliosis procedures. EVAR procedures contribute to a high radiation dose to the patient and for scoliosis procedures, it is often young girls that are undergoing surgery. LÄS MER

  5. 5. 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