Essays about: "spatial distortions"

Found 4 essays containing the words spatial distortions.

  1. 1. Faster Environment Modelling and Integration into Virtual Reality Simulations

    University essay from Högskolan i Skövde/Institutionen för ingenjörsvetenskap

    Author : Jonas Nyman; [2021]
    Keywords : 3D re-construction; Digital Photogrammetry; LiDAR; Remote Sensing; Point Cloud; Point cloud to mesh; Terrestrial Laser Scanning; Static Laser scan; Virtual Reality;

    Abstract : The use of virtual reality in engineering tasks, such as in virtual commissioning, has increased steadily in recent years, where a robot, machine or object of interest can be simulated and visualized. Yet, for a more immerse experience, an environment for the object in question needs to be constructed. READ MORE

  2. 2. Spatially Coupled Codes in Turbo Equalization

    University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

    Author : Mgeni Makambi Mashauri; [2019]
    Keywords : Turbo equalization; spatial coupling; waterfall versus error floor; codes on graphs; iterative receivers; LDPC codes in turbo equalization; Technology and Engineering;

    Abstract : In this thesis we investigate the application of spatial coupling in turbo equalization. We show that with spatial coupling we can have a fresh perspective on the trade-off between performance in the waterfall and error floor region often encountered in the choice of codes for turbo equalization. READ MORE

  3. 3. Development of a Quality Assurance Strategy for Magnetic Resonance Imaging in Radiotherapy

    University essay from Umeå universitet/Institutionen för fysikUmeå universitet/Radiofysik

    Author : Kristina Sandgren; [2015]
    Keywords : MRI; magnetic resonance imaging; PET MRI; quality assurance; strategy; radiotherapy;

    Abstract : Radiotherapy is a common treatment option for malignant tumors. The use of magnetic resonance imaging in radiotherapy is increasing world-wide and sets additional requirements on the image quality compared to diagnostics applications. READ MORE

  4. 4. Quality Assurance of the Spatial Accuracy of Large Field of View Magnetic Resonance Imaging

    University essay from KTH/Skolan för teknik och hälsa (STH)

    Author : Fredrik Illerstam; [2014]
    Keywords : MRI; MR; spatial accuracy; spatial distortions; large FOV; MR-only; radiotherapy treatment planning; RTP; gradient non-linearity; B0 inhomogeneity;

    Abstract : In todays Radiotherapy Treatment Planning, RTP, it is common to use Computed Tomography, CT, together with Magnetic Resonance Imaging, MRI, where CT provides electron density information and a geometrical reference, and where MRI provides superior soft tissue contrast. To sim- plify the workflow and improve treatment accuracy, research groups have demonstrated how to exclude CT and use a MRI-only approach. READ MORE