Essays about: "SIRT"

Found 4 essays containing the word SIRT.

  1. 1. Beyond Traditional Tomography: X-ray Multi-projection Imaging for Additive Manufacturing

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

    Author : Maria Esther Vilar Alvarez; [2023]
    Keywords : X-ray tomography; X-ray multiprojection-imaging; deep learning; additive manufacturing; synchrotron radiation; Physics and Astronomy;

    Abstract : The main aim of this bachelor thesis is to push the limits of 3D X-ray imaging by studying the minimum number of projections required to retrieve high-quality reconstructions for additive manufacturing processes. This project first focuses on understanding how X-ray tomography works, by reconstructing additive manufacturing data already obtained (from PSI, TOMCAT beamline) using two standard reconstruction algorithms, GRIDREC and SIRT. READ MORE

  3. 2. Iterative Reconstruction Algorithm for Phase-Contrast X-Ray Imaging

    University essay from KTH/Medicinteknik och hälsosystem

    Author : Ahmad Sadek; Ruben Pozzi; [2020]
    Keywords : Computed tomography; Medical research; Phase-contrast imaging; Propagation-based imaging; SIRT; Iterative algorithm; Paganin’s phase-retrieval; Datortomografi; Medicinsk forskning; Faskontrastavbildning; Propagation-baserad avbildning; SIRT; Iterativ algoritm; Paganins fasåterhämtning;

    Abstract : Phase-contrast imaging (PCI) is a modality of medical x-ray imaging that can solve one of the main limitations with conventional attenuation-based imaging: the imaging of materials with low attenuation coefficients, such as soft tissues. A modality of PCI, Propagation-based phase-contrast imaging (PBI), was used in this project. READ MORE

  4. 3. Optimization of dose in relation to image quality in synchrotron based tomographic lung-imaging

    University essay from Lunds universitet/Sjukhusfysikerutbildningen

    Author : Sajad Mohammed Ali; [2019]
    Keywords : Physics and Astronomy;

    Abstract : Introduction: Lung imaging with synchrotron light sources is currently a widely studied field. The image resolution and quality are remarkable and the level of detail possible to study the smallest structures, the alveoli, of the lungs cannot be obtained by any other non-invasive imaging modality with the current technology. READ MORE

  5. 4. Activity Quantification of Yttrium-90: PET as compared to Bremsstrahlung SPECT

    University essay from Lunds universitet/Sjukhusfysikerutbildningen

    Author : Christian Andersson; [2012]
    Keywords : Medicine and Health Sciences;

    Abstract : Introduction: Cancer treatment is a process with continuous development. The most common treatment, within the field of radiation physics, is external radiation therapy, whereas one of the least common methods is Selective Internal RadioTherapy (SIRT). SIRT is a rather novel method for treating liver carcinoma. READ MORE