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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 1011 to 1020 of 4649 (0.049 seconds)Spelling suggestions: "subject:"homography."" "subject:"lomography.""
| 1011 |
New Imaging Approaches for Process Tomography Based on Capacitive SensorsGunes, Cagdas 27 December 2018 (has links)
No description available.
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| 1012 |
Graphical User Interface (GUI) to Study Different Reconstruction Algorithms in Computed TomographyAbhange, Shital K. 04 May 2009 (has links)
No description available.
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| 1013 |
Quantitative PET/CT Imaging Based Biodistribution Validated in a Porcine Model using a Targeted Peptide Radiotracer, AMBALayman, Ricky R., Jr 25 September 2013 (has links)
No description available.
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| 1014 |
Limited view sound speed imaging for breast cancer detectionZwiebel, Alicia A. 24 October 2013 (has links)
No description available.
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| 1015 |
A comparative study of art and the convolution method as applied to cross borehole geophysical tomographyWheeler, Mark Lee January 1987 (has links)
No description available.
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| 1016 |
Network approach to impedance computerized tomographyDai, Hong January 1985 (has links)
No description available.
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| 1017 |
MRI-Based Attenuation Correction for PET ReconstructionSteinberg, Jeffrey 12 September 2008 (has links)
No description available.
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| 1018 |
Compressive Sensing for Tomographic Echo Imaging in Two DimensionsWilliams, Taylor P. 08 August 2012 (has links)
No description available.
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| 1019 |
Offset Optical Coherence TomographyXu, Weiming 21 July 2021 (has links)
No description available.
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| 1020 |
Characterization of Center-of-Mass and Rebinning in Positron Emission Tomography with Motion / Karaktärisering av masscentrum och händelseuppdatering i positronemissionstomografi med rörelseHugo, Linder January 2021 (has links)
Medical molecular imaging with positron emission tomography (PET) is sensitive to patient motion since PET scans last several minutes. Despite advancements in PET, such as improved photon-pair time-of-flight (TOF) difference resolution, motion deformations limit image resolution and quantification. Previous research of head motion tracking has produced the data-driven centroid-of-distribution (COD) algorithm. COD generates a 3D center-of-mass (COM) over time via raw list-mode PET data, which can guide motion correction such as gating and event rebinning in non-TOF PET. Knowledge gaps: COD could potentially benefit from sinogram corrections used in image reconstruction, while rebinning has not extended to TOF PET. Methods: This study develops COD with event mass (incorporating random correction and line-of-response (LOR) normalization) and a simplistic TOF rebinner. In scans of phantoms and moving heads with F11 flouro-deoxy-glucose (FDG) tracer, COD alternatives are evaluated with a signal-to-noise ratio (SNR) via linear fit to image COM, while rebinning is evaluated with mean squared error (MSE). Results: COD SNR did not benefit from a corrected event mass. The prototype TOF rebinning reduced MSE, although there were discretization errors and event loss at extreme bins for LOR and TOF due to the simplistic design, which introduced image artifacts. In conclusion, corrected event mass in COD is not promising, while TOF rebinning appears viable if techniques from state-of-the-art LOR rebinning are incorporated.
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