Search for dissertations about: "diagnostic imaging computed tomography"

Showing result 1 - 5 of 79 swedish dissertations containing the words diagnostic imaging computed tomography.

  2. 1. Diagnostic quality in computed tomography angiography after EVAR

    Author : Leena Lehti; Lund Diagnostisk radiologi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; computed tomography angiography; image reconstruction; Abdominal aortic aneurysm; dual-energy computed tomography; metal artefact reduction; EVAR; contrast medium induced nephropathy;

    Abstract : .... READ MORE

  4. 2. Imaging in Idiopathic Normal Pressure Hydrocephalus : The value of structured radiological evaluation

    Author : Karin Kockum; Katarina Laurell; Elna-Marie Larsson; Katrine Riklund; Johan Wasselius; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; normal pressure hydrocephalus; gait disorder; computed tomography; magnetic resonance imaging; diagnostisk radiologi; Diagnostic Radiology;

    Abstract : Background: Idiopathic normal pressure hydrocephalus (iNPH) is a neurological condition where the symptoms include disturbed gait, balance, cognition and continence. The diagnostic guidelines are based on typical symptoms combined with imaging showing enlarged ventricles. READ MORE

  5. 3. Metal artifacts in computed tomography : impact of reduction methods on image quality and radiotherapy treatment planning

    Author : Karin Andersson; Per Thunberg; Eva Norrman; Jan Persliden; Anders Tingberg; Örebro universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; computed tomography; metal artifacts; image quality; visual grading analysis; radiotherapy; proton therapy; hip prosthesis; dental implants;

    Abstract : Degradation of image quality by metal artifacts is a common problem in computed tomography (CT) imaging, which can limit the diagnostic value of a CT examination and also introduce inaccuracies in radiotherapy (RT) treatment planning. In recent years, commercial metal artifact reduction (MAR) methods have been launched by several CT vendors. READ MORE

  6. 4. Computed tomography in endodontic decision making

    Author : Fernando José Mota de Almeida; Malmö universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; endodontics; decision making; computed tomography; CBCT; cone beam; interviews; qualitative content analysis; diagnostic thinking efficacy; therapeutic efficacy;

    Abstract : Computed tomography has been used in dentistry as a complement to two-dimensional (2D) imaging since the 1980s. The advent of cone beam computed tomography (CBCT), a more modern computed tomog-raphy technique, meant a revolution in dento-maxillofacial imaging due to sharper images, with less radiation and at a lower cost than with mul-ti-slice computed tomography (MSCT), i. READ MORE

  7. 5. Magnetic resonance imaging with ultrashort echo time as a substitute for X-ray computed tomography

    Author : Adam Johansson; Tufve Nyholm; Karlsson Mikael; James Balter; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; magnetic resonance imaging; computed tomography substitute; ultrashort echo time; parallel imaging; radial imaging; radiofysik; radiation physics;

    Abstract : Radiotherapy dose calculations have evolved from simple factor based methods performed with pen and paper, into computationally intensive simulations based on Monte Carlo theory and energy deposition kernel convolution.Similarly, in the field of positron emission tomography (PET), attenuation correction, which was originally omitted entirely, is now a crucial component of any PET reconstruction algorithm. READ MORE