Essays about: "Skandion"

Found 4 essays containing the word Skandion.

  1. 1. Dual Energy CT as a Foundation for Proton Therapy Treatmen Planning - A pilot study

    University essay from Umeå universitet/Institutionen för fysik

    Author : Torbjörn Näsmark; [2019]
    Keywords : Dual Energy CT; DECT; Computed Tomography; CT; Proton Therapy; Skandion;

    Abstract : 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. READ MORE

  3. 2. The impact of metallic cranial implants on proton-beam radiotherapy treatment plans for near implant located tumours : A phantom study on the physical effects and agreement between simulated treatment plans and the resulting treatment for near implant located cranial tumours

    University essay from Umeå universitet/Institutionen för fysik

    Author : Adam Sjögren; [2018]
    Keywords : Proton-based Radiotherapy; Cranial implants; Titanium implants; Cancer treatment; metal streak artifacts.;

    Abstract : Within the field of radiotherapy treatments of tumour diseases, the hunt for more accurate and effective treatment methods is a continuous process. For some years ion-beam based radiotherapy, especially the proton-beam based applications, has increased in popularity and availability. READ MORE

  4. 3. Practical implementation and exploration of dual energy computed tomography methods for Hounsfield units to stopping power ratio conversion

    University essay from Uppsala universitet/Medicinsk strålningsvetenskap

    Author : David Kennbäck; [2018]
    Keywords : computed tomography; CT; dual energy; DECT; dual energy computed tomography; dual energy CT; HU; SPR; Skandion; Skandionkliniken; Hounsfield; Hounsfield unit; Stopping power ratio;

    Abstract : The purpose of this project was to explore the performance of methods for estimating stopping power ratio (SPR) from Hounsfield units (HU) using dual energy CT scans, rather than the standard single energy CT scans, with the aim of finding a method which could outperform the current single energy stoichiometric method. Such a method could reduce the margin currently added to the target volume during treatment which is defined as 3. READ MORE

  5. 4. In-beam proton range monitoring during proton therapy : a Monte Carlo study on the feasibility of secondary gamma imaging

    University essay from KTH/Skolan för teknikvetenskap (SCI)

    Author : Gustaf Lönn; [2016]
    Keywords : ;

    Abstract : Proton radiation therapy allows for delivering a high dose to a well-confinedregion of interest due to the characteristic proton dose deposition. Due to protonrange straggling, anatomic variations in patients and small patient setup errors,treatment plans needs to account for proton range uncertainties of up to 3.5% invivo. READ MORE