Search for dissertations about: "Phantom"

Showing result 11 - 15 of 169 swedish dissertations containing the word Phantom.

  2. 11. Toward increased applicability of ultrasound contrast agents

    Author : Malin Larsson; Lars-Åke Brodin; Anna Bjällmark; Kenneth Caidahl; Jan Engvall; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Contrast agent; Contrast-to-tissue-ratio; Echocardiography; Endocardial border; Microbubbles; Multimodal; Phantom; Polymer; Ultrasound; Wall motion score index.; Teknik och hälsa; Technology and Health;

    Abstract : Ultrasound is one of the most widely used modalities in medical imaging because of its high cost-effectiveness, wide availability in hospitals, generation of real-time images, and use of nonionizing radiation. However, the image quality can be insufficient in some patients. READ MORE

  4. 12. Risk from radionuclides: a frog's perspective : Accumulation of 137Cs in a riparian wetland, radiation doses, and effects on frogs and toads after low-dose rate exposure

    Author : Karolina Stark; Nils Kautsky; Petra Wallberg; Torbjörn Nylén; Michael Gilek; Dennis Woodhead; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; dose model; mass balance budget; overbank sedimentation; amphibian; phantom; thermoluminescence chip; radiosensitivity; DNA damage; Biology; Biologi;

    Abstract : Threats from man-made radionuclides include waste issues, increasing number of power plants, underground bomb testing, nuclear weapons, and “dirty bombs”. Until recently the ionizing radiation protection system focused on protecting humans with an implied protection of biota. READ MORE

  5. 13. Methods Used in Quality Assurance and Optimization in Nuclear Medicine Imaging and Imaging Systems

    Author : Sven-Åke Starck; Sten Carlsson; Göteborgs universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; phantom; image quality; attenuation coefficients; detective quantum efficiency DQE ; digital filtering; iterative reconstruction; bone scintigraphy; bone SPECT; visual grading analysis VGA ; ROC-analysis;

    Abstract : .... READ MORE

  6. 14. Amputees' experience and descriptions of phantom phenomena : a qualitative study

    Author : Berit Björkman; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : In phantom phenomena, pain and/ or other sensations appear to be experienced from amputated body parts. The phenomena have long been the object of research and their underlying mechanisms have been discussed over the years. READ MORE

  7. 15. Radiation Detection Techniques for the Enhancement of Nuclear Safety

    Author : Petty Bernitt Cartemo; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; whole body counting; depth profiling; voxel phantom; nuclear safeguards; Monte Carlo; orphan sources; radiation-induced material damage; pulsed beam; positron lifetime;

    Abstract : The hazard originating from the use of nuclear materials in various areas of the society necessitates a number of experimental techniques for controlling and increasing the safety connected to radioactive substances.The following thesis is divided into two parts, representing different aspects to the detection of radiation effects. READ MORE