Search for dissertations about: "computed tomography"

Showing result 1 - 5 of 394 swedish dissertations containing the words computed tomography.

  1. 1. 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 : MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; 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

  2. 2. Computed tomography in endodontic decision making

    Author : Fernando José Mota de Almeida; Malmö universitet; []
    Keywords : MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; 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

  3. 3. Computed tomography of sawlogs : knot detection and sawing optimization

    Author : Erik Johansson; Luleå tekniska universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Träteknik; Wood Technology;

    Abstract : Branches on trees introduce defects on sawn timber called knots. By scanning sawlogs using computed tomography, knots can be detected and accounted for so that the sawing process can be optimized with respect to outgoing product value. READ MORE

  4. 4. Computed tomography of sawlogs : knot detection and sawing optimization

    Author : Erik Johansson; SP Trä; []
    Keywords : ;

    Abstract : .... READ MORE

  5. 5. Diagnostic quality in computed tomography angiography after EVAR

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

    Abstract : .... READ MORE