Essays about: "Backprojection"

Showing result 1 - 5 of 16 essays containing the word Backprojection.

  1. 1. Development and Implementation of Techniques for the Simulation and Processing for Future SAR Systems

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Tim Kinnunen; [2023]
    Keywords : Synthetic Aperture Radar; SAR; Reverse Backprojection Algorithm; RBPA; Backprojection Algorithm; SAR simulator; SAR processing;

    Abstract : Synthetic Aperture Radar (SAR) is a type of radar system that can generate high-resolution images with which one can detect subtle changes on the scale of centimetres from space. It can operate in any weather condition and during both day and night, making it unique compared to optical sensors. READ MORE

  3. 2. Limited angle reconstruction for 2D CT based on machine learning

    University essay from KTH/Skolan för teknikvetenskap (SCI)

    Author : Eric Oldgren; Knut Salomonsson; [2023]
    Keywords : CT; computed tomography; limited angle; machine learning; limited data; ill posed problem; inverse problem;

    Abstract : The aim of this report is to study how machine learning can be used to reconstruct 2 dimensional computed tomography images from limited angle data. This could be used in a variety of applications where either the space or timeavailable for the CT scan limits the acquired data.In this study, three different types of models are considered. READ MORE

  4. 3. Exploring Near-Field SAR with mmWave Pulsed Coherent Radar

    University essay from Lunds universitet/Matematisk statistik

    Author : Elina Yrlid; [2023]
    Keywords : SAR; Synthetic Aperture Radar; PCR; pulsed coherent radar; radar; mmWave; millimeter-wave; near-field; 60GHz; Technology and Engineering;

    Abstract : This thesis explores the option to apply Synthetic Aperture Radar (SAR) techniques to image near-field targets utilizing mmWave pulsed coherent radar (PCR). The recent development of mmWave radars has broadened the scope for SAR, but there are few concrete examples explaining and demonstrating the fundamental SAR algorithms from a PCR perspective. READ MORE

  5. 4. Implementation of the Weighted Filtered Backprojection Algorithm in the Dual-Energy Iterative Algorithm DIRA-3D

    University essay from Linköpings universitet/Institutionen för systemteknik

    Author : Markus Tuvesson; [2021]
    Keywords : wFBP; weighted Filtered Backprojection; DIRA-3D;

    Abstract : DIRA-3D is an iterative model-based reconstruction method for dual-energy helical CT whose goal is to determine the material composition of the patient from accurate linear attenuation coefficients (LACs). Possible applications are, for example, to aid in calculations of radiation transport and dose calculations in brachytherapy with low energy photons, and in proton therapy. READ MORE

  6. 5. Adaptive Backprojection : Developing a simple reconstruction algorithm

    University essay from Mittuniversitetet/Avdelningen för elektronikkonstruktion

    Author : Ante Vernersson; [2018]
    Keywords : CT; Computed Tomography; Backprojection; Reconstruction; 3D; Adaptive Backprojection; Algorithm;

    Abstract : This group project aims to investigate the possibility ofconstructing a prototype micro-CT-scanner, hopefullyfurthering the advancement in the field of small CT-scanners,with the ultimate goal to provide a structure useable in anambulance, to scan and send images to the hospital, so thattreatment can commence directly upon arrival.This report deals with the matter of reconstructing the takenimages to construct a three-dimensional model of thescanned object. READ MORE