Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 252 for “"Region of interest"”.
-
On-board Robotic Multi-pinhole SPECT System for Region-of-interest (ROI) Imaging
… could potentially improve the effectiveness of radiation therapy. However, current on-board imaging systems are limited in their functional and molecular imaging capability. Single Photon Emission Computed Tomography (SPECT) is a candidate to achieve on-board functional and molecular imaging. …
-
Neural Region-of-Interest-Aware Video Compression for Wildlife Monitoring Under Edge Computing Constraints
… clips, the animal occupies only a small part of the frame, while most of the image is background. Standard whole-frame compression does not account for this imbalance and may allocate bitrate to regions that matter less for later review. This thesis presents a region-of-interest (ROI)-aware …
-
Creating a virtual slide map from sputum smear images for region-of-interest localisation in automated microscopy
Automated microscopy for the detection of tuberculosis (TB) in sputum smears seeks to address the strain on technicians in busy TB laboratories and to achieve faster diagnosis in countries with a heavy TB burden. As a step in the development of an automated microscope, the project described here …
-
Motion-robust Machine Learning Methods for Region-of-Interest Tracking and Selective Magnetic Resonance Imaging with External Shim Arrays
… that can be obtained. Despite the adoption of fast single-shot MRI techniques, capable of acquiring images in less than a second per slice, fetal motion remains problematic, leading to noticeable artifacts between slices. These artifacts, which degrade image quality and impede accurate …
-
Surveying Underwater Shipwrecks with Probabilistic Roadmaps
<p>Almost two thirds of the Earth's surface is covered in ocean, and yet, only about 5% of it is mapped. There are an unknown amount of sunken ships, planes, and other artifacts hidden below the sea. Extensive search via boat and a sonar tow fish following a standard lawnmower pattern is used to …
-
Diffusion-Weighted MRI of Fibrous Tissue: Contribution of Fat
The goal of this research project was to develop a model that predicts the effect of fat solution on an MRI signal by a DW-GE pulse sequence. The region of interest is a heterogeneous structure inside a 3mmx3mmx9mm voxel, consisting of loosely arranged micron-sized tubes filled with fat. By …
-
SEARCHLIGHT CT: A NEW REGULARIZED RECONSTRUCTION METHOD FOR HIGHLY COLLIMATED X-RAY TOMOGRAPHY
… exposure when primarily the reconstruction of a specified region of interest is required. To achieve this, the Searchlight CT approach restricts the acquisition essentially to the region of interest, yet the algorithm provides a stable and robust reconstruction of the region of interest. The …
-
Effective design augmentation for prediction
… will fit a first order model in the early stages of the study and obtain the path of steepest ascent. The path leads the experimenter out of this initial region of interest and into a new region of interest. The experimenter may fit another first order model here or, if curvature is believed to be …
-
Investigation of a trapezoidal microchannel for hydrodynamic detachment of cells or biomolecules.
… cells. To address the limitations in current microfluidic detachment assays and NSA removal methods, a trapezoidal microchannel was investigated as a hydrodynamic method of cell or biomolecule detachment. This design utilizes the characteristic pressure-driven flow of microfluidics to detach cells …
-
Sequential design augmentation with model misspecification
… (RSM) one attempts to model some variable of interest, usually as a known function of design variables. Subsequent analysis often indicates a need to move to a new region of interest. Many times the design is augmented by adding points sequentially to this new region of interest. Current …
-
Problems with a localized nature in exploration seismology
A wide range of problems in seismology have a localized nature. Examples include inversion for time-lapse change, salt boundary position and Amplitude or Phase Versus Angle (AVA/PVA). With increasing computational power, many inversion procedures have transitioned away from forward models with …
-
Implementation of Residual Tandem Neural Networks for Photonic Inverse Design
… can greatly benefit the modeling and design of nanophotonic and optical structures. Traditional full-wave simulations are time and resource-intensive, which can act as a bottleneck in photonic design. On the other hand, deep-learning approaches for designing the response of nanophotonic …
-
Development of an H-Alpha Index for the Detection of PMS Candidates in Young Open Clusters
<p>One phase of formation of medium- and low-mass stars is the optically visible phase known as the pre-main-sequence or PMS phase. In order to further the understanding of this phase, more of these PMS objects need to be identified and classified. Previous techniques have used photometry to …
-
Differential Cross Sections for Compton Scattering Off the Proton at 185 MEV
A complete angular distribution of Compton scattering off the proton was measured at average laboratory bremsstrahlung energy of 185 MeV. The experiment was per-formed at the Saskatchewan Accelerator Laboratory using the new high duty factor elec-tron beam. The scattered photons were observed with …
-
Multi-resolution dental image registration based on genetic algorithm
… required for the preprocessing steps of the image comparison component of ADIS. We proposed a multi resolution dental image registration based on genetic algorithms. The main objective of this research is to develop techniques for registration of extracted subject regions of interest …
-
Place recognition for GNSS-denied autonomous multi-robot search and rescue
Teams of agile unmanned aerial vehicles (UAVs) possess great potential for search and rescue missions requiring a rapid response over a large region of interest. With proper coordination, these robotic vehicles can leverage affordable hardware to efficiently search a remote region or disaster site …
-
A Space -Time Finite-Element Method for the Signorini Problem and for Viscoplasticity With Small Elastic Dilatations
… process accurately. The space-time nature of the code allows high degrees of time refinement in the region of interest immediately beneath the indenter, thus improving the computational efficiency of the simulation. The code also tracks the contact interface exactly via a node movement …
-
FMRI guided DTI at the grey-white matter interface : with application to a connectivity analysis of the default mode network in Urbach-Wiethe disease
The cerebral cortex is composed of a thin layer of Grey Matter (GM), functionally subdivided into discrete regions which are connected in a large scale network via White Matter (WM) tracts. With fMRI (Functional Magnetic Resonance Imaging) it is possible to identify cortical regions involved in …
-
On the subtropical front in the South Atlantic Ocean
The region surrounding the Tristan da Cunha Archipelago has received little attention to date due to its remote location. An extensive revision of previous literature covers the majority of oceanographic research undertaken in the region of interest. New satellite derived oceanographic data sets …
-
Pose independent target recognition system using pulsed Ladar imagery
Although a number of object recognition techniques have been developed to process LADAR scanned terrain scenes, these techniques have had limited success in target discrimination in part due to low-resolution data and limits in available computation power. We present a pose-independent Automatic …
Page 1 of 13