Essays about: "K-edge"

Found 5 essays containing the word K-edge.

  1. 1. Multi-spectral X-ray imaging with a laser-plasma accelerator

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

    Author : Andrea Angella; [2022]
    Keywords : Multi-spectral imaging; single-photon counting; X-ray absorption spectroscopy; XAS; LWFA; laser-wakefield acceleration; K-edge; imaging; metal-detection algorithm; Physics and Astronomy;

    Abstract : This master thesis focuses on the creation of an algorithm to perform multispectral imaging of a metallic target using X-rays. The generation of an ultrashort high-power low-divergent X-ray beam is performed by means of a Ti:Sapphire laser driven wake-field plasma accelerator. READ MORE

  3. 2. Material decomposition using a photon counting X-ray detector in low energy range

    University essay from Lunds universitet/Sjukhusfysikerutbildningen

    Author : Rasmus Solem; [2021]
    Keywords : Medicine and Health Sciences;

    Abstract : Material decomposition in X-ray imaging is used to separate different materials or elements in an image and to quantify their respective concentration. The material decomposition and quantification are made possible by the dependency of attenuation on the attenuating material and photon energy. READ MORE

  4. 3. Optimization of Dual Energy data acquisition using CdTe-detectors with electronic spectrum splitting

    University essay from Tekniska högskolan; Biomedicinsk instrumentteknik

    Author : Charlotte Eriksson; [2013]
    Keywords : Dual Energy; CdTe; X-ray; photon-counting detectors;

    Abstract : Dual energy imaging has made it possible to enhance contrast in medical images using images containing different energy information, by combining low and high energy images. Dual energy data can either be acquired using double exposures or splitting the energy spectrum into two images using one exposure. READ MORE

  5. 4. Feasibility of Gd Contrast Agent in Spectral Computed Tomography

    University essay from KTH/Fysik

    Author : Martin Björnmalm; Maximillian Patzauer; [2013]
    Keywords : ;

    Abstract : X-ray computed tomography (CT) is currently a vital diagnostic tool in hospitals the world over. To be able to image a patient's interior quickly can facilitate a diagnosis so that proper treatment can be administered. In some cases a contrast agent is administered intravenously prior to the CT-scan, in order to enhance image quality. READ MORE

  6. 5. X-ray absorption spectroscopy by means of Lanczos-chain driven damped coupled cluster response theory

    University essay from Institutionen för fysik, kemi och biologi

    Author : Thomas Fransson; [2011]
    Keywords : NEXAFS; coupled cluster; damped response theory; molecular properties; computational physics; theoretical chemistry; X-ray absorption spectroscopy;

    Abstract : A novel method by which to calculate the near edge X-rayabsorption fine structure region of the X-ray absorption spectrum has been derived and implemented. By means of damped coupled cluster theory at coupled cluster levels CCS, CC2, CCSD and CCSDR(3), the spectra of neon and methane have been investigated. READ MORE