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Dissertations / Theses on the topic 'Motion correction'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Smith, Rhodri. "Motion correction in medical imaging." Thesis, University of Surrey, 2017. http://epubs.surrey.ac.uk/841883/.

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It is estimated that over half of current adults within Great Britain under the age of 65 will be diagnosed with cancer at some point in their lifetime. Medical Imaging forms an essential part of cancer clinical protocols and is able to furnish morphological, metabolic and functional information. The imaging of molecular interactions of biological processes in vivo with Positron Emission Tomography (PET) is informative not only for disease detection but also therapeutic response. The qualitative and quantitative accuracy of imaging is thus vital in the extraction of meaningful and reproducible

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Sklyar, Andrey V. "Testing SPECT Motion Correction Algorithms." Digital WPI, 2010. https://digitalcommons.wpi.edu/etd-theses/419.

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Frequently, testing of Single Photon Emission Computed Tomography (SPECT) motion correction algorithms is done either by using simplistic deformations that do not accurately simulate true patient motion or by applying the algorithms directly to data acquired from a real patient, where the true internal motion is unknown. In this work, we describe a way to combine these two approaches by using imaging data acquired from real volunteers to simulate the data that the motion correction algorithms would normally observe. The goal is to provide an assessment framework which can both: simulate re

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3

Sulikowska, Aleksandra. "Motion correction in high-field MRI." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/33674/.

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The work described in this thesis was conducted at the University of Nottingham in the Sir Peter Mansfield Imaging Centre, between September 2011 and 2014. Subject motion in high- resolution magnetic resonance imaging (MRI) is a major source of image artefacts. It is a very complex problem, due to variety of physical motion types, imaging techniques, or k-space trajectories. Many techniques have been proposed over the years to correct images for motion, all looking for the best practical solution in clinical scanning, which would give cost- effective, robust and high accuracy correction, witho

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Darwesh, Reem. "Motion correction in nuclear medicine imaging." Thesis, University of Nottingham, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.664310.

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Patient motion either internal (organ motion) or external (body movement) can produce artefacts that can adversely affect nuclear medicine imaging. Motion artefacts can impair diagnostic information and potentially affect the image findings and prognosis for patients. The goal of this work was to investigate the effect of motion on nuclear medicine imaging and to improve image quality, lesion detectability, and tumour volume delineation by applying motion correction techniques. To investigate the effects of motion under controlled simulated conditions, a three dimensional phantom drive system

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5

Bannister, Peter R. "Motion correction for functional magnetic resonance images." Thesis, University of Oxford, 2004. http://ora.ox.ac.uk/objects/uuid:f01d9fcb-e8bc-44ae-99a5-cc3e0bc12956.

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This work addresses the distortions in Functional Magnetic Resonance Images (FMRI) caused by subject motion. FMRI is a non-invasive technique which shows great promise in providing researchers and clinicians with neurological information both about healthy subjects and clinical patients by mapping functional activation within the brain using Echo Planar Imaging (EPI). If reliable information is to be obtained from these images, motion correction must be carried out in order to remove or suppress the artefacts arising from subject movement. This work begins by using exploratory data techniques

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Dikaios, Nikolaos. "Respiratory motion correction for positron emission tomography." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609967.

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7

Schleyer, Paul. "Respiratory motion correction in PET/CT imaging." Thesis, King's College London (University of London), 2012. https://kclpure.kcl.ac.uk/portal/en/theses/respiratory-motion-correction-in-petct-imaging(001f09fd-b405-4cbf-9ff7-9ba6541f3dab).html.

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In dual modality PET-CT imaging, respiratory motion can introduce blurring in PET images and create a spatial mismatch between the PET and CT datasets. Attenuation correction errors can result from this mismatch, which can produce severe artefacts that potentially alter the clinical interpretation of the images. Various approaches of reducing these effects have been developed. Many involve respiratory gated acquisitions which generally require a measure of the respiratory cycle throughout imaging. In this work, a retrospective respiratory gating technique was devel¬oped for both PET and CT whi

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Bai, Wenjia. "Respiratory motion correction in positron emission tomography." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:f73b144d-5287-4600-8b82-74229dc0eb31.

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In this thesis, we develop a motion correction method to overcome the degradation of image quality introduced by respiratory motion in positron emission tomography (PET), so that diagnostic performance for lung cancer can be improved. Lung cancer is currently the most common cause of cancer death both in the UK and in the world. PET/CT, which is a combination of PET and CT, providing clinicians with both functional and anatomical information, is routinely used as a non-invasive imaging technique to diagnose and stage lung cancer. However, since a PET scan normally takes 15-30 minutes, respirat

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9

Weerasinghe, Arachchige Chaminda Perera. "Rotational Motion Artifact Correction in Magnetic Resonance Imaging." University of Sydney. Electrical and Information Engineering, 1999. http://hdl.handle.net/2123/357.

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The body motion of patients, during magnetic resonance (MR) imaging causes significant artifacts in the reconstructed image. Artifacts are manifested as a motion induced blur and ghost repetitions of the moving structures. which obscure vital anatomical and pathological detail. The techniques that have been proposed for suppressing motion artifacts fall into two major categories. Real-time techniques attempt to prevent the motion from corrupting the data by restricting the data acquisition times or motion of the patients, whereas the post-processing techniques use the information e

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10

Maclaren, Julian Roscoe. "Motion Detection and Correction in Magnetic Resonance Imaging." Thesis, University of Canterbury. Electrical and Computer Engineering, 2007. http://hdl.handle.net/10092/1220.

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Magnetic resonance imaging (MRI) is a non-invasive technique used to produce high-quality images of the interior of the human body. Compared to other imaging modalities, however, MRI requires a relatively long data acquisition time to form an image. Patients often have difficulty staying still during this period. This is problematic as motion produces artifacts in the image. This thesis explores the methods of imaging a moving object using MRI. Testing is performed using simulations, a moving phantom, and human subjects. Several strategies developed to avoid motion artifact problems are pre

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Cavaturu, Raja Kalyan Ram. "Motion Correction Structured Light using Pattern Interleaving Technique." UKnowledge, 2008. http://uknowledge.uky.edu/gradschool_theses/551.

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Phase Measuring Profilometry (PMP) is the most robust scanning technique for static 3D data acquisition. To make this technique robust to the target objects which are in motion during the scan interval a novel algorithm called ‘Pattern Interleaving’ is used to get a high density single scan image and making Phase Measuring Profilometry insensitive to ‘z’ motion and prevent motion banding which is predominant in 3D reconstruction when the object is in motion during the scan time

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12

Larsson, Jonatan. "Implementation and evaluation of motion correction for quantitative MRI." Thesis, Linköpings universitet, Medicinsk informatik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-61331.

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Image registration is the process of aligning two images such that their mutual features overlap. This is of great importance in several medical applications. In 2008 a novel method for simultaneous T1, T2 and proton density quantification was suggested. The method is in the field of quantitative Magnetic Resonance Imaging or qMRI. In qMRI parameters are quantified by a pixel-to-pixel fit of the image intensity as a function of different MR scanner settings. The quantification depends on several volumes of different intensities to be aligned. If a patient moves during the data aquisition the d

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13

Lewis, Peter. "Improving Peripheral Vision Through Optical Correction and Stimulus Motion." Doctoral thesis, Linnéuniversitetet, Institutionen för medicin och optometri (MEO), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-52286.

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The loss of central vision subsequent to macular disease is often extremely debilitating. People with central field loss (CFL) must use other peripheral areas of the retina in order to see; areas with inferior resolution capacity, which are also affected by off-axis optical errors. The overall aim of the work encompassed by this thesis was to identify and evaluate methods of improving vision for people with CFL; with focus on the effects of off-axis optical correction and stimulus motion on resolution acuity and contrast sensitivity. Off-axis optical errors were measured using a commercially-a

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14

Bush, Michael. "Patient-specific prospective respiratory motion correction in cardiovascular MRI." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1554979431869627.

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15

Sieberth, Till. "Motion blur in digital images : analys, detection and correction of motion blur in photogrammetry." Thesis, Loughborough University, 2016. https://dspace.lboro.ac.uk/2134/20212.

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Unmanned aerial vehicles (UAV) have become an interesting and active research topic for photogrammetry. Current research is based on images acquired by an UAV, which have a high ground resolution and good spectral and radiometrical resolution, due to the low flight altitudes combined with a high resolution camera. UAV image flights are also cost effective and have become attractive for many applications including, change detection in small scale areas. One of the main problems preventing full automation of data processing of UAV imagery is the degradation effect of blur caused by camera moveme

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Gu, Songxiang. "Body Deformation Correction for SPECT Imaging." Digital WPI, 2009. https://digitalcommons.wpi.edu/etd-dissertations/319.

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"Single Photon Emission Computed Tomography (SPECT) is a medical imaging modality that allows us to visualize functional information about a patient's specific organ or body systems. During 20 minute scan, patients may move. Such motion will cause misalignment in the reconstruction, degrade the quality of 3D images and potentially lead to errors in diagnosis. Body bend and twist are types of patient motion that may occur during SPECT imaging and which has been generally ignored in SPECT motion correction strategies. To correct for these types of motion we propose a deformation model and its in

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17

Jung-Ha, Kim. "The Estimation and Correction of Rigid Motion in Helical Computed Tomography." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/15353.

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X-ray CT is a tomographic imaging tool used in medicine and industry. Although technological developments have significantly improved the performance of CT systems, the accuracy of images produced by state-of-the-art scanners is still often limited by artefacts due to object motion. To tackle this problem, a number of motion estimation and compensation methods have been proposed. However, no methods with the demonstrated ability to correct for rigid motion in helical CT scans appear to exist. The primary aims of this thesis were to develop and evaluate effective methods for the estimation and

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18

Segobin, Shailendra Hemun. "Development of a motion correction and partial volume correction algorithm for high resolution imaging in Positron Emission Tomography." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/development-of-a-motion-correction-and-partial-volume-correction-algorithm-for-high-resolution-imaging-in-positron-emission-tomography(d84967c5-422a-40ce-9c4b-a0e74c431005).html.

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Since its inception around 1975, Positron Emission Tomography (PET) has proved to be an important tool in medical research as it allows imaging of the brain function in vivo with high sensitivity. It has been widely used in clinical dementia research with [18F]2-Fluoro-2-Deoxy-D-Glucose (FDG) and amyloid tracers as imaging biomarkers in Alzheimer's Disease (AD). The high resolution offered by modern scanner technology has the potential to provide new insight into the interaction of structural and functional changes in AD. However, the high resolution of PET is currently limited by movement and

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Klyuzhin, Ivan S. "Deformable motion correction and spatial image analysis in positron emission tomography." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/60277.

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Positron emission tomography (PET) is a molecular imaging modality that allows to quantitatively assess the physiological function of tissues in-vivo. Subject motion during imaging degrades the quantitative accuracy of the data. In small animal imaging, motion is minimized by the use of anesthesia, which interferes with the normal physiology of the brain. This can be circumvented by imaging awake rodents; however, in this case correction for non-cyclic motion with rigid and deformable components is required. In the first part of the thesis, the problem of motion correction in PET imaging of un

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McQuaid, S. "Characterisation and correction of respiratory-motion artefacts in cardiac PET-CT." Thesis, University College London (University of London), 2010. http://discovery.ucl.ac.uk/19732/.

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Respiratory motion during cardiac Positron Emission Tomography (PET) Computed Tomography (CT) imaging results in blurring of the PET data and can induce mismatches between the PET and CT datasets, leading to attenuation-correction artefacts. The aim of this project was to develop a method of motion-correction to overcome both of these problems. The approach implemented was to transform a single CT to match the frames of a gated PET study, to facilitate respiratory-matched attenuation-correction, without the need for a gated CT. This is benecial for lowering the radiation dose to the patient an

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21

Wang, Jiali. "Motion Correction Algorithm of Lung Tumors for Respiratory Gated PET Images." FIU Digital Commons, 2009. http://digitalcommons.fiu.edu/etd/96.

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Respiratory gating in lung PET imaging to compensate for respiratory motion artifacts is a current research issue with broad potential impact on quantitation, diagnosis and clinical management of lung tumors. However, PET images collected at discrete bins can be significantly affected by noise as there are lower activity counts in each gated bin unless the total PET acquisition time is prolonged, so that gating methods should be combined with imaging-based motion correction and registration methods. The aim of this study was to develop and validate a fast and practical solution to the problem

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22

Noonan, Philip John. "An investigation into motion correction schemes for high resolution 3D PET And PET/CT." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/an-investigation-into-motion-correction-schemes-for-high-resolution-3d-pet-and-petct(b52783fa-a5cf-4f85-a050-e57f8f775f45).html.

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Although motion correction in medical imaging is well established and has attracted much interest and research funding, a gap still exists in that there is a lack of reliable, low-cost hardware to enable such techniques to be widely adopted in healthcare. Motion correction of brain Positron Emission Tomography (PET) data for instance is an important step in realising the potential offered by modern high resolution PET scanners. Since it is not likely that subjects can remain stationary throughout the PET scan, which can last 60 minutes or more, accurate and reliable motion tracking is needed t

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23

Karlsson, Anette. "In-Plane Motion Correction in Reconstruction of non-Cartesian 3D-functional MRI." Thesis, Linköpings universitet, Datorseende, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-72056.

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When patients move during an MRI examination, severe artifacts arise in the reconstructed image and motion correction is therefore often desired. An in-plane motion correction algorithm suitable for PRESTO-CAN, a new 3D functional MRI method where sampling of k-space is radial in kx-direction and kz-direction and Cartesian in ky-direction, was implemented in this thesis work. Rotation and translation movements can be estimated and corrected for sepa- rately since the magnitude of the data is only affected by the rotation. The data were sampled in a radial pattern and the rotation was estimated

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24

Flouri, Dimitra. "Tracer-kinetic model-driven motion correction with application to renal DCE-MRI." Thesis, University of Leeds, 2016. http://etheses.whiterose.ac.uk/16485/.

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A major challenge of the image registration in dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) is related to the image contrast variations caused by the contrast agent passage. Tracer-kinetic model-driven motion correction is an attractive solution for DCE-MRI, but previous studies only use the 3-parameter modified Tofts model. Firstly, a generalisation based on a 4-parameter 2-compartment tracer-kinetic model is presented. A practical limitation of these models is the need for non-linear least-squares (NLLS) fitting. This is prohibitively slow for image-wide parameter estimatio

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Loktyushin, Alexander [Verfasser], and Bernhard [Akademischer Betreuer] Schölkopf. "Blind Retrospective Motion Correction of MR Images / Alexander Loktyushin ; Betreuer: Bernhard Schölkopf." Tübingen : Universitätsbibliothek Tübingen, 2016. http://d-nb.info/1164169130/34.

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Scott, Andrew David. "Magnetic resonance coronary vessel wall imaging with highly efficient respiratory motion correction." Thesis, Imperial College London, 2011. http://hdl.handle.net/10044/1/6978.

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There is a need for a noninvasive imaging technique for use in longitudinal studies of sub-clinical coronary artery disease. Magnetic resonance (MR) can be used to selectively and non-invasively image the coronary wall without the use of ionising radiation. However, high-resolution 3D studies are often time consuming and unreliable, as data acquisition is generally gated to a small window of diaphragm positions around end-expiration which results in inherently poor and variable respiratory efficiency. This thesis describes the development and application of a novel technique (beat-to-beat resp

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Sun, Jing. "Correction of the respiratory motion of the heart from 4D myocardial images." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0015877.

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Yarach, Uten [Verfasser]. "Correction of residual artifacts in prospectively motion-corrected MR-data / Uten Yarach." Magdeburg : Universitätsbibliothek, 2016. http://d-nb.info/1128726424/34.

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Loktyushin, Alexander Verfasser], and Bernhard [Akademischer Betreuer] [Schölkopf. "Blind Retrospective Motion Correction of MR Images / Alexander Loktyushin ; Betreuer: Bernhard Schölkopf." Tübingen : Universitätsbibliothek Tübingen, 2016. http://d-nb.info/1164169130/34.

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Woods, Bronwyn Lewisia. "Toward a Processing Pipeline for Two-photon Calcium Imaging of Neural Populations." Research Showcase @ CMU, 2013. http://repository.cmu.edu/dissertations/393.

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Two-photon calcium imaging (TPCI) is a functional neuroimaging technique that simultaneously reveals the function of small populations of cells as well as the structure of surrounding brain tissue. These unique properties cause TPCI to be increasingly popular for experimental basic neuroscience. Unfortunately, methodological development for data processing has not kept pace with experimental needs. I address this lack by developing and testing new methodology for several key tasks. Specifically, I address two primary analysis steps which are nearly universally required in early data processing

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Bhushan, Manav. "Motion correction and parameter estimation in DCE-MRI sequences : application to colorectal cancer." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:1793b0c1-7f2a-41cb-8427-c6927379056e.

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Cancer is one of the leading causes of premature deaths across the world today, and there is an urgent need for imaging techniques that can help in early diagnosis and treatment planning for cancer patients. In the last four decades, magnetic resonance imaging (MRI) has emerged as one of the leading modalities for non-invasive imaging of tumours. By using dynamic contrast-enhanced magnetic resonance imaging (DCEMRI), this modality can be used to acquire information about perfusion and vascularity of tumours, which can help in predicting response to treatment. There are many factors that compli

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Alhamud, Alkathafi Ali. "Implementation of anatomical navigators for real time motion correction in diffusion tensor imaging." Doctoral thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/10052.

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Includes bibliographical references.<br>Prospective motion correction methods using an optical system, diffusion-weighted prospective acquisition correction, or a free induction decay navigator have recently been applied to correct for motion in diffusion tensor imaging. These methods have some limitations and drawbacks. This article describes a novel technique using a three-dimensional-echo planar imaging navigator, of which the contrast is independent of the b-value, to perform prospective motion correction in diffusion weighted images, without having to reacquire volumes during which motion

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Delgado, Reyes Lourdes Marielle. "Evaluating motion processing algorithms for use with fNIRS data from young children." Thesis, University of Iowa, 2015. https://ir.uiowa.edu/etd/5929.

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Motion artifacts are often a significant component of the measured signal in functional near-infrared spectroscopy (fNIRS) experiments. A variety of methods have been proposed to address this issue, including principal component analyses (PCA), Kalman filtering, correlation-based signal improvement (CBSI), wavelet filtering, spline interpolation, and autoregressive algorithms. The efficacy of these techniques has been compared using simulated data; however, our understanding of how these techniques fare when dealing with task-based cognitive data is limited. Recently, Brigadoi et al. (2014) qu

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Robie, David Lee. "Error Correction and Concealment of Bock Based, Motion-Compensated Temporal Predition, Transform Coded Video." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7101.

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Error Correction and Concealment of Block Based, Motion-Compensated Temporal Prediction, Transform Coded Video David L. Robie 133 Pages Directed by Dr. Russell M. Mersereau The use of the Internet and wireless networks to bring multimedia to the consumer continues to expand. The transmission of these products is always subject to corruption due to errors such as bit errors or lost and ill-timed packets; however, in many cases, such as real time video transmission, retransmission request (ARQ) is not practical. Therefore receivers must be capable of recovering from corrupted data. Errors

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Ullisch, Marcus Görge [Verfasser]. "A navigator-based rigid body motion correction for magnetic resonance imaging / Marcus Görge Ullisch." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2012. http://d-nb.info/1024349616/34.

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Burger, Ian H. "A control system approach to subject specific prospective respiratory motion correction in cardiac MRI." Doctoral thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/10220.

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Includes bibliographical references.<br>Respiratory motion of the heart is a problem for high-resolution cardiac MRI. Diaphragmatic navigator gating with a 5mm acceptance window is most commonly used to address this but has an inherently low respiratory efficiency that is further compromised by respiratory drift. A novel method is presented that uses data from multiple navigators prior to the imaging segment as input for a control system to predict the diaphragm position throughout the imaging segment and correct the slice position in real time.

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Kraus, Martin [Verfasser], and Joachim [Gutachter] Hornegger. "Motion Correction and Signal Enhancement in Optical Coherence Tomography / Martin Kraus ; Gutachter: Joachim Hornegger." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2017. http://d-nb.info/113613316X/34.

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Kanj, Ali. "Flicker Removal and Color Correction for High Speed Videos." Thesis, Paris Est, 2017. http://www.theses.fr/2017PESC1115/document.

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Le deflickering consiste à supprimer le scintillement présent dans les séquences d’images afin de réduire les variations lumineuses entre chacune des images de la vidéo. Il s’agit d’une tâche essentielle, nécessaire dans plusieurs applications, en particulier dans les séquences de films archivés, les vidéos comprimées et les vidéos time-lapse. Au cours de ces dernières années, avec le développement des technologies d’acquisition à haute vitesse, il y a eu un regain d’intérêt pour le problème de suppression de flicker, en particulier le flicker périodique. Dans ce contexte, le flicker correspon

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Torle, Petter. "Scene-based correction of image sensor deficiencies." Thesis, Linköping University, Department of Electrical Engineering, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1752.

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<p>This thesis describes and evaluates a number of algorithms for reducing fixed pattern noise in image sequences. Fixed pattern noise is the dominantnoise component for many infrared detector systems, perceived as a superimposed pattern that is approximately constant for all image frames. </p><p>Primarily, methods based on estimation of the movement between individual image frames are studied. Using scene-matching techniques, global motion between frames can be successfully registered with sub-pixel accuracy. This allows each scene pixel to be traced along a path of individual detector elemen

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Hering, Jan [Verfasser], and Bernd [Akademischer Betreuer] Jähne. "Robust Motion and Distortion Correction of Diffusion-Weighted MR Images / Jan Hering ; Betreuer: Bernd Jähne." Heidelberg : Universitätsbibliothek Heidelberg, 2016. http://d-nb.info/1180737466/34.

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Barnett, Robert. "Improving the Accuracy of CT-derived Attenuation Correction in Respiratory-Gated PET/CT Imaging." Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/17710.

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The effect of respiratory motion on attenuation correction in Fludeoxyglucose (18F) positron emission tomography (FDG-PET) was investigated. Improvements to the accuracy of computed tomography (CT) derived attenuation correction were obtained through the alignment of the attenuation map to each emission image in a respiratory gated PET scan. Attenuation misalignment leads to artefacts in the reconstructed PET image and several methods were devised for evaluating the attenuation inaccuracies caused by this. These methods of evaluation were extended to finding the frame in the respiratory gated

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Pedroza, Moises. "MOBILE TRACKING SYSTEM “MOTION ON THE OCEAN” TEST." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/608307.

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International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>The Transportable Range Augmentation and Control System (TRACS), Mobile Telemetry System (MTS), is a versatile system capable of supporting anywhere when called upon. The MTS is designed to operate anywhere on land. It is unknown how the system will perform on a floating platform without a stabilizing gimbal. The operation of a tracking system at sea generally require the use of a three-axis pedestal. The MTS is a two-axis pedestal. This paper is a report on how t

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Eschelbach, Martin [Verfasser], and Klaus [Akademischer Betreuer] Scheffler. "Head Motion Correction in Magnetic Resonance Imaging Using NMR Field Probes / Martin Eschelbach ; Betreuer: Klaus Scheffler." Tübingen : Universitätsbibliothek Tübingen, 2018. http://d-nb.info/1173699961/34.

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Webley, Peter William. "Atmospheric water vapour correction to InSAR surface motion measurements on mountains : case study on Mount Etna." Thesis, University of Reading, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405480.

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Hess, Aaron T. "Real-time motion and main magnetic field correction in MR spectroscopy using an EPI volumetric navigator." Doctoral thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/11359.

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In population groups where subjects do not lie still during Magnetic Resonance Spectroscopy (MRS) scans, real-time volume of interest (VOI), frequency, and main magnetic field (B0) shim correction may be necessary. This work demonstrates firstly that head movement causes significant B0 disruption in both single voxel spectroscopy and spectroscopic imaging.

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Polycarpou, Irene. "The impact of respiratory motion correction methods on tumour detection and quantification in Positron Emission Tomography." Thesis, King's College London (University of London), 2014. https://kclpure.kcl.ac.uk/portal/en/theses/the-impact-of-respiratory-motion-correction-methods-on-tumour-detection-and-quantification-in-positron-emission-tomography(2f38d893-4531-41df-a7fc-1fa7080cd63c).html.

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Respiratory motion degrades PET spatial resolution and image quality limiting the potential benefits from increased resolution. Motion correction is complicated by limitations of the poor statistical quality of PET data and there is still not a robust method available. Motion correction can be implemented at different stages of data processing either during or after reconstruction and may result in substantial improvements in image quality. The recent development of whole body PET-MRI scanners might provide a potential solution for motion correction since internal organ motion could be measure

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Roujol, Sébastien. "MR-guided thermotherapies of mobile organs : advances in real time correction of motion and MR-thermometry." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14263/document.

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L'ablation des tissus par hyperthermie locale guidée par IRM est une technique prometteuse pour le traitement du cancer et des arythmies cardiaques. L'IRM permet d'extraire en temps réel des informations anatomiques et thermiques des tissus. Cette thèse a pour objectif d'améliorer et d'étendre la méthodologie existante pour des interventions sur des organes mobiles comme le rein, le foie et le coeur. La première partie a été consacrée à l'introduction de l'imagerie rapide (jusqu'à 10-15 Hz) pour le guidage de l'intervention par IRM en temps réel. L'utilisation de cartes graphiques (GPGPU) a pe

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Soultanidis, Georgios. "Methodology and phantom studies for the development and assessment of motion correction in simultaneous PET-MR." Thesis, King's College London (University of London), 2015. https://kclpure.kcl.ac.uk/portal/en/theses/methodology-and-phantom-studies-for-the-development-and-assessment-of-motion-correction-in-simultaneous-petmr(1d2e96a4-5e50-4b07-85f2-492f010abc24).html.

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Simultaneous PET-MR imaging has recently emerged into routine clinical use, with significant role in diagnosis and treatment. The high sensitivity of a PET scanner, combined with the anatomical and functional information given by MR can focus to a molecular level and provide simultaneous information about individual but correlated parameters. The combination of these modalities has also brought new opportunities. One of these is the potential for the MRI to capture and measure patient motion during PET scanning. This motion information, in the form of motion fields can be applied back to the P

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Küstner, Thomas [Verfasser]. "Motion Correction of Positron Emission Tomography Data by a Magnetic Resonance Imaging derived Model / Thomas Küstner." München : Verlag Dr. Hut, 2018. http://d-nb.info/1153253984/34.

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Schulz, Eric Werner mathematics UNSW. "Air-sea flux parameterisations in a shallow tropical sea." Awarded by:University of New South Wales. mathematics, 2002. http://handle.unsw.edu.au/1959.4/18659.

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This thesis is a study of the air-sea fluxes of momentum, sensible heat and latent heat. Fluxes are estimated using the covariance, COARE2.6b bulk flux algorithm, and inertial dissipation methods. The bulk algorithm is validated against the covariance fluxes for the first time in a light-wind, shallow tropical sea, with strong atmospheric instability and low sea state conditions. The removal of ship motion contamination is investigated. This is the first study to quantify the errors associated with corrections for ship motion contamination, and the effects of motion contamination on the covari

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