Search for dissertations about: "collimation"
Showing result 1 - 5 of 11 swedish dissertations containing the word collimation.
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1. SPECT Imaging using Pinhole Collimation : System Design and Simulation Studies for Pre-Clinical and Clinical Imaging
Abstract : The focus of this dissertation is the use of pinhole collimation in Nuclear Medicine. A pinhole is a single aperture in an opaque material that is placed between the detector and source of interest, and photons must pass through the hole to reach the detector. The choices of pinhole parameters, e.g. READ MORE
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2. Development of a compact high energy treatment unit combining narrow pencil beam scanning and multileaf collimation
Abstract : .... READ MORE
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3. Spectral Mammography with X-Ray Optics and a Photon-Counting Detector
Abstract : Early detection is vital to successfully treating breast cancer, and mammography screening is the most efficient and wide-spread method to reach this goal. Imaging low-contrast targets, while minimizing the radiation exposure to a large population is, however, a major challenge. READ MORE
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4. Diagnostic criteria and dose limiting approaches for image modalities in odontology
Abstract : Objectives: Technical innovations in radiography enable the development of new approaches to reduce the dose to patients. The aim of this thesis was to explore dose optimization approaches for the most frequently used radiographic modalities in dentistry. READ MORE
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5. Linear and Nonlinear Transport in Quantum Nanostructures
Abstract : In this thesis, electron transport in mesoscopic semiconductor nanostructures, in particular so-called electron billiards or quantum dots, is studied. The thesis can be divided into two areas: the linear response regime of transport, and the nonlinear response regime of transport. READ MORE