Essays about: "collimator"

Showing result 21 - 25 of 38 essays containing the word collimator.

  1. 21. Optimization of X-ray Source for Digital Mammography -  X-ray Optics Approach

    University essay from Institutionen för medicinsk teknik; Tekniska högskolan

    Author : Mineh Nazary; [2012]
    Keywords : ;

    Abstract : The work presents a new design of X-ray source for digital mammography imaging with the help of crystal sources and X-ray optics technology. The aim of the project was to introduce a new source for medical x ray imaging and evaluate its ability of performance. The source is build of an array of multiple micro-emitters instead of a single source. READ MORE

  3. 22. Photon-Tagging Measurements at MAX-lab

    University essay from Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionen

    Author : Mohsen Meshkian; [2012]
    Keywords : collimator; Bremsstrahlung; Electron beam; LINAC; Pb-glass; focal plane; tagging efficiency.; Physics and Astronomy;

    Abstract : At the Tagged-Photon Facility at MAX-lab, the Swedish National Electron Accelerator Laboratory situated in Lund, bremsstrahlung photons are used for photonuclear experiments. The production takes place via an interaction between an energetic pulsed-stretched electron beam and a thin conducting foil. READ MORE

  4. 23. Optimisation of image acquisition and reconstruction of 111In-pentetrotide SPECT

    University essay from Radiofysik

    Author : Daniel Holmberg; [2012]
    Keywords : Radiation Science; Nuclear Medicine; SPECT; OSEMS; Image analysis; MLEM; Radiation Physics; 111-In; Pentetrotide; Monte Carlo; ESSE; OSEMS;

    Abstract : The aim of this study is to optimise the acquisition and reconstruction for SPECT with 111In- pentetrotide with the iterative reconstruction software OSEMS. For 111In-pentetrotide SPECT, the uptake in the tumour is usually high compared to uptake in normal tissue. READ MORE

  5. 24. Positive Pion Photoproduction Near Threshold

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Kärnfysik

    Author : Ayaz Khan; [2012]
    Keywords : range telescope; photonuclear reaction; π production; differential cross section; Physics and Astronomy;

    Abstract : Pion photo production from the nucleon is an important process utilized to understand the structure of the nucleon and the fundamental dynamics of the nucleon system. The neutral pion production has been extensively studied resulting in valuable data sets. READ MORE

  6. 25. Collimation technique for HPGe-detector gamma spectrometry in intense radiation fields

    University essay from Lunds universitet/Sjukhusfysikerutbildningen

    Author : Mattias Jönsson; [2010]
    Keywords : Radioekologi; Medicine and Health Sciences;

    Abstract : The aim of this master thesis was to develop a rotation-based collimation system for large coaxial high-purity germanium detectors for use in intense radiation fields. A collimator was constructedformed as a cylinder surrounding the detector, with a 90° slit opening to the detector. READ MORE