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Dissertations / Theses on the topic 'Parallell imaging'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

Herterich, Rebecka, and Anna Sumarokova. "Coil Sensitivity Estimation and Intensity Normalisation for Magnetic Resonance Imaging." Thesis, KTH, Medicinteknik och hälsosystem, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-263149.

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The quest for improved efficiency in magnetic resonance imaging has motivated the development of strategies like parallel imaging where arrays of multiple receiver coils are operated simultaneously in parallel. The objective of this project was to find an estimation of phased-array coil sensitivity profiles of magnetic resonance images of the human body. These sensitivity maps can then be used to perform an intensity inhomogeneity correction of the images. Through investigative work in Matlab, a script was developed that uses data embedded in raw data from a magnetic resonance scan, to generat

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2

Spence, Dan Kenrick. "Array combination for parallel imaging in Magnetic Resonance Imaging." Texas A&M University, 2003. http://hdl.handle.net/1969.1/5944.

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In Magnetic Resonance Imaging, the time required to generate an image is proportional to the number of steps used to encode the spatial information. In rapid imaging, an array of coil elements and receivers are used to reduce the number of encoding steps required to generate an image. This is done using knowledge of the spatial sensitivity of the array and receiver channels. Recently, these arrays have begun to include a large number of coil elements. Ideally, each coil element would have its own receiver channel to acquire the image data. In practice, this is not always possible due to econom

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3

Brown, David Gerald. "Instrumentation for parallel magnetic resonance imaging." Texas A&M University, 2005. http://hdl.handle.net/1969.1/4784.

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Parallel magnetic resonance (MR) imaging may be used to increase either the throughput or the speed of the MR imaging experiment. As such, parallel imaging may be accomplished either through a "parallelization" of the MR experiment, or by the use of arrays of sensors. In parallelization, multiple MR scanners (or multiple sensors) are used to collect images from different samples simultaneously. This allows for an increase in the throughput, not the inherent speed, of the MR experiment. Parallel imaging with arrays of sensor coils, on the other hand, makes use of the spatial localization proper

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4

Qu, Peng. "Advances in parallel imaging reconstruction techniques." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B36898582.

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Qu, Peng, and 瞿蓬. "Advances in parallel imaging reconstruction techniques." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B36898582.

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6

Kim, Wan. "Study of parallel MR imaging techniques." Thesis, State University of New York at Buffalo, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1594739.

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<p> In MRI, it is more desirable to scan less data as possible because it reduces MRI scanning time. We want to get a clear image by reconstructing the signals we acquire from the MRI machine. Special scanning or sampling techniques are needed to overcome this issue based on various mathematical methods. </p><p> We present an improved random sampling pattern for SAKE (simultaneous autocalibrating and k-space estimation) reconstruction and an iterative GRAPPA reconstruction using Wiener filter. </p><p> In our iterative method using Wiener filter, in contrast to the conventional GRAPPA wher

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7

Rane, Swati Dnyandeo. "Parallel magnetic resonance imaging: characterization and comparison." Texas A&M University, 2005. http://hdl.handle.net/1969.1/2578.

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Magnetic Resonance Imaging (MRI) is now increasingly being used for fast imaging applications such as real-time cardiac imaging, functional brain imaging, contrast enhanced MRI, etc. Imaging speed in MRI is mainly limited by different imaging parameters selected by the pulse sequences, the subject being imaged and the RF hardware system in operation. New pulse sequences have been developed in order to decrease the imaging time by a faster k-space scan. However, they may not be fast enough to facilitate imaging in real time. Parallel MRI (pMRI), a technique initially used for improving image SN

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Gol, Gungor Derya. "Subspace Techniques for Parallel Magnetic Resonance Imaging." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406301655.

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9

Steeden, Jennifer Anne. "Rapid phase-contrast magnetic resonance imaging using spiral trajectories and parallel imaging." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1306873/.

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Phase contrast (PC) MRI is a proven method of measuring blood flow in the clinical environment. Traditionally, PCMR data is acquired using cardiac gated Cartesian sequences. However, these sequences are time consuming and difficult to perform in patients with irregular heart rates. The work of my thesis covers three alternative PC sequences, all using undersampled spiral sequences with SENSE reconstruction algorithms. The first piece of work investigates real-time spiral PCMR. The spiral flow sequence was validated at rest by comparing stroke volumes in the aorta of healthy volunteers, against

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Bjåstad, Tore Grüner. "High frame rate ultrasound imaging using parallel beamforming." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for sirkulasjon og bildediagnostikk, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-5298.

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The human heart contracts and relaxes approximately once each second. This is a complex process where different parts of the cardiac tissue contract and relax at different times and at different rates. The accurate evaluation of this deformation with ultrasound requires the use of a high frame rate. The frame rate of a conventional ultrasound image is limited by the round trip propagation time of the sound pulse along each of the scan lines covering the imaged object. A common technique to increase the frame rate is multiple line acquisition, MLA. Using this technique, several scan lines are a

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11

Wu, Bing. "Exploiting data sparsity in parallel magnetic resonance imaging." Thesis, University of Canterbury. Electrical and Computer Engineering, 2010. http://hdl.handle.net/10092/3914.

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Magnetic resonance imaging (MRI) is a widely employed imaging modality that allows observation of the interior of human body. Compared to other imaging modalities such as the computed tomography (CT), MRI features a relatively long scan time that gives rise to many potential issues. The advent of parallel MRI, which employs multiple receiver coils, has started a new era in speeding up the scan of MRI by reducing the number of data acquisitions. However, the finally recovered images from under-sampled data sets often suffer degraded image quality. This thesis explores methods that incorporate

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12

Nana, Roger. "On optimality and efficiency of parallel magnetic resonance imaging reconstruction challenges and solutions /." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26477.

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Thesis (Ph.D)--Biomedical Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Hu, Xiaoping; Committee Member: Keilholz, Shella; Committee Member: Mao, Hui; Committee Member: Martin, Diego; Committee Member: Oshinski, John. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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13

Chaari, Lotfi. "Parallel magnetic resonance imaging reconstruction problems using wavelet representations." Phd thesis, Université Paris-Est, 2010. http://tel.archives-ouvertes.fr/tel-00587410.

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Pour réduire le temps d'acquisition ou bien améliorer la résolution spatio-temporelle dans certaines application en IRM, de puissantes techniques parallèles utilisant plusieurs antennes réceptrices sont apparues depuis les années 90. Dans ce contexte, les images d'IRM doivent être reconstruites à partir des données sous-échantillonnées acquises dans le " k-space ". Plusieurs approches de reconstruction ont donc été proposées dont la méthode SENSitivity Encoding (SENSE). Cependant, les images reconstruites sont souvent entâchées par des artéfacts dus au bruit affectant les données observées, ou

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14

Gagoski, Borjan Aleksandar. "Magnetic resonance spectroscopic imaging using parallel transmission at 7T." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/63069.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 123-130).<br>Conventional magnetic resonance spectroscopic imaging (MRSI), also known as phase-encoded (PE) chemical shift imaging (CSI), suffers from both low signal-to-noise ratio (SNR) of the brain metabolites, as well as inflexible tradeoffs between acquisition time and spatial resolution. In addition, although CSI at higher main field strengths, e.g. 7 Tesla (T), offers improved SNR over clin

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15

Setsompop, Kawin. "Design algorithms for parallel transmission in magnetic resonance imaging." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44902.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Includes bibliographical references (p. 153-158).<br>The focus of this dissertation is on the algorithm design, implementation, and validation of parallel transmission technology in Magnetic Resonance Imaging (MRI). Novel algorithms are proposed which yield excellent excitation control, low RF power requirements, methods that ext

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16

Oliver-Taylor, A. "Parallel transit methods for arterial spin labelling magnetic resonance imaging." Thesis, University College London (University of London), 2013. http://discovery.ucl.ac.uk/1382488/.

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Vessel selective arterial spin labelling (ASL) is a magnetic resonance imaging technique which permits the visualisation and assessment of the perfusion territory of a specific set of feeding arteries. It is of clinical importance in both acute and chronic cerebrovascular disease, and the mapping of blood supplied to tumours. Continuous ASL is capable of providing the highest signal-to-noise (SNR) ratio of the various ASL methods. However on clinical systems it suffers from high hardware demands, and the control of systematic errors decreases perfusion sensitivity. A separate labelling coil av

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17

Duncan, Stephen Howard. "The application of parallel processing techniques in coded aperture imaging." Thesis, University of Southampton, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239709.

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Beqiri, Arian. "Parallel transmission MRI for optimised cardiac imaging and improved safety." Thesis, King's College London (University of London), 2015. http://kclpure.kcl.ac.uk/portal/en/theses/parallel-transmission-mri-for-optimised-cardiac-imaging-and-improved-safety(217895a3-0a83-4212-b8c4-d4438a39bca3).html.

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The move towards higher static magnetic field strengths in MRI has allowed improved imaging quality from increased signal to noise ratio. However challenges have arisen from increased inhomogeneity in the radio frequency (RF) fields required to create MR signals and greater RF energy deposition – known as the specific absorption rate (SAR) – within imaging subjects. These factors have prompted the use of parallel transmission (PTx) MRI; in which multiple independent channels are used to control the RF electromagnetic fields. In this thesis the aim was to develop methods for controlling SAR usi

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19

Gudino, Natalia. "NOVEL PARALLEL TRANSMIT SYSTEMS FOR MRI APPLICATIONS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1363178933.

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20

Brion, Véronique. "Towards real-time diffusion imaging : noise correction and inference of the human brain connectivity." Thesis, Paris 11, 2013. http://www.theses.fr/2013PA112058/document.

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La plupart des constructeurs de systèmes d'imagerie par résonance magnétique (IRM) proposent un large choix d'applications de post-traitement sur les données IRM reconstruites a posteriori, mais très peu de ces applications peuvent être exécutées en temps réel pendant l'examen. Mises à part certaines solutions dédiées à l'IRM fonctionnelle permettant des expériences relativement simples ainsi que d'autres solutions pour l'IRM interventionnelle produisant des scans anatomiques pendant un acte de chirurgie, aucun outil n'a été développé pour l'IRM pondérée en diffusion (IRMd). Cependant, comme l

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21

Breuer, Felix. "Development and application of efficient strategies for parallel magnetic resonance imaging." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=982469136.

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22

Ramb, Rebecca [Verfasser], and Jürgen [Akademischer Betreuer] Hennig. "K-t-sub-Nyquist sampled parallel echo planar imaging in MRI." Freiburg : Universität, 2016. http://d-nb.info/1122647654/34.

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23

Rao, Raman P. V. "Parallel implementation of the filtered back projection algorithm for tomographic imaging." Master's thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-02162010-020232/.

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24

Yeh, Ernest Nanjung 1975. "Advanced image reconstruction in parallel magnetic resonance imaging : constraints and solutions." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33078.

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Thesis (Ph. D.)--Harvard-MIT Division of Health Sciences and Technology, 2005.<br>Includes bibliographical references.<br>Imaging speed is a crucial consideration for magnetic resonance imaging (MRI). The speed of conventional MRI is limited by hardware performance and physiological safety measures. "Parallel" MRI is a new technique that circumvents these limitations by utilizing arrays of radiofrequency detector coils to acquire data in parallel, thereby enabling still higher imaging speeds. In parallel MRI, coil arrays are used to accomplish part of the spatial encoding that was traditionall

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Balla, Apuroop. "IMPULSE RESPONSE CHARACTERIZATION OF BREAST TOMOSYNTHESIS RECONSTRUCTION WITH PARALLEL IMAGING CONFIGURATIONS." OpenSIUC, 2010. https://opensiuc.lib.siu.edu/theses/401.

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It's universally accepted that early detection, diagnosis, and suitable treatment are best hope to increase the survival chance for breast cancer (BC) patients. To date, the most cost effective method for breast screening and early detection is mammography. The mammography technique uses a low-dose X-ray system to acquire images of the breast. Limitations of mammography exist, including 20% false negative rate, many call backs for screening, low positive predictive value of about 15% to 34% from biopsy. Digital Breast tomosynthesis (DBT) is a new technique that acquires limited angle tomograp

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26

Misal, Nilimb V. Mr. "A Fast Parallel Method of Interleaved Fft for Magnetic Resonance Imaging." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1164733382.

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27

Eriksson, Emil. "Simulation of Biological Tissue using Mass-Spring-Damper Models." Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-27663.

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The goal of this project was to evaluate the viability of a mass-spring-damper based model for modeling of biological tissue. A method for automatically generating such a model from data taken from 3D medical imaging equipment including both the generation of point masses and an algorithm for generating the spring-damper links between these points is presented. Furthermore, an implementation of a simulation of this model running in real-time by utilizing the parallel computational power of modern GPU hardware through OpenCL is described. This implementation uses the fourth order Runge-Kutta me

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Seiberlich, Nicole. "Advances in Non-Cartesian Parallel Magnetic Resonance Imaging using the GRAPPA Operator." kostenfrei, 2008. http://www.opus-bayern.de/uni-wuerzburg/volltexte/2008/2832/.

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29

Herikstad, Åsmund. "Parallel Techniques for Estimation and Correction of Aberration in Medical Ultrasound Imaging." Thesis, Norwegian University of Science and Technology, Department of Computer and Information Science, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9090.

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<p>Medical ultrasound imaging is a great diagnostic tool for physicians because of its noninvasive nature. It is performed by directing ultrasonic sound into tissue and visualizing the echo signal. Aberration in the reflected signal is caused by inhomogeneous tissue varying the speed of sound, which results in a blurring of the image. Dr. Måsøy and Dr. Varslot at NTNU have developed and algorithm for estimating and correcting ultrasound aberration. This algorithm adaptively estimates the aberration and adjusts the next transmitted signal to account for the aberration, resulting in a clearer im

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Ohliger, Michael A. "Fundamental and practical limits to image acceleration in parallel magnetic resonance imaging." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33075.

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Thesis (Ph. D.)--Harvard-MIT Division of Health Sciences and Technology, 2005.<br>Includes bibliographical references (leaves 152-160).<br>Imaging speed in conventional magnetic resonance imaging (MRI) is limited by the performance of magnetic field gradients and the rate of power deposition in tissue. Parallel MRI techniques overcome these constraints by exploiting information stored within the spatial sensitivity patterns of radiofrequency detector arrays to substitute for some of the spatial information that would normally be obtained using magnetic field gradients. Parallel MRI strategies

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Yetişir, Filiz. "Parallel radiofrequency transmission for 3 Tesla and 7 Tesla magnetic resonance imaging." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/113982.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 141-146).<br>Magnetic resonance imaging (MRI) is a noninvasive imaging technique with high soft tissue contrast. MR scanners are characterized by their main magnetic field strength. Commercially available clinical MR scanners commonly have main field strengths of 1.5 and 3 Tesla. Researchers increasingly explore clinical benefits of higher field strength scanners as they provide higher sign

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32

Ahlman, Gustav. "Improved Temporal Resolution Using Parallel Imaging in Radial-Cartesian 3D functional MRI." Thesis, Linköpings universitet, Datorseende, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69123.

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MRI (Magnetic Resonance Imaging) is a medical imaging method that uses magnetic fields in order to retrieve images of the human body. This thesis revolves around a novel acquisition method of 3D fMRI (functional Magnetic Resonance Imaging) called PRESTO-CAN that uses a radial pattern in order to sample the (kx,kz)-plane of k-space (the frequency domain), and a Cartesian sample pattern in the ky-direction. The radial sample pattern allows for a denser sampling of the central parts of k-space, which contain the most basic frequency information about the structure of the recorded object. This all

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García, Antonio. "Parallel time varying volume rendering on tile displays." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1135801433.

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34

Geng, Zhao. "Visual analysis of abstract multi-dimensional data with parallel coordinates." Thesis, Swansea University, 2013. https://cronfa.swan.ac.uk/Record/cronfa43002.

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35

Pierre, Eric Y. "Reliable Use of Acquired and Simulated Signal Databases to Reduce MRI Acquisition Time." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1404220001.

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Johansson, Adam. "Magnetic resonance imaging with ultrashort echo time as a substitute for X-ray computed tomography." Doctoral thesis, Umeå universitet, Radiofysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-93053.

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Radiotherapy dose calculations have evolved from simple factor based methods performed with pen and paper, into computationally intensive simulations based on Monte Carlo theory and energy deposition kernel convolution. Similarly, in the field of positron emission tomography (PET), attenuation correction, which was originally omitted entirely, is now a crucial component of any PET reconstruction algorithm. Today, both of these applications – radiotherapy and PET – derive their needed in-tissue radiation attenuation coefficients from images acquired with X-ray computed tomography (CT). Since X-

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De, Silva Weeraddana Manjula Kumara. "Correlation Imaging for Real-time Cardiac MRI." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1471346206.

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Lawlor, Michael Andrew. "A real-time parallel processing system for synthetic aperture sonar." Thesis, University of Newcastle Upon Tyne, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360273.

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Ramb, Rebecca [Verfasser]. "k-t-sub-Nyquist sampled Parallel Echo Planar Imaging in MRI / Rebecca Ramb." München : Verlag Dr. Hut, 2016. http://d-nb.info/1111160678/34.

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Chen, Kailiang. "A Column-Row-Parallel ASIC architecture for 3D wearable / portable medical ultrasonic imaging." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/87916.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 163-174).<br>This work presents a scalable Column-Row-Parallel ASIC architecture for 3D wearable / portable medical ultrasound. It leverages programmable electronic addressing to achieve linear scaling for both hardware interconnection and software data acquisition. A 16x16 transceiver ASIC is fabricated and flip-chip bonded to a 16x16 capacitive micromachined ultrasonic transducer (CMUT) t

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Jagtap, Vinod. "FAST FOURIER TRANSFORM USING PARALLEL PROCESSING FOR MEDICAL APPLICATIONS." University of Akron / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1270678206.

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Heilman, Jeremiah A. "Multi-Dimensional Excitation in Magnetic Resonance Imaging for Homogeneity Correction in the Presence of Dielectric Media." Cleveland, Ohio : Case Western Reserve University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=case1238442193.

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Ozturk, Isik Esin. "Implementation of parallel imaging techniques for lipid unaliasing and faster acquisition for improving spatial characterization of magnetic resonance spectroscopic imaging of gliomas." Diss., Search in ProQuest Dissertations & Theses. UC Only, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3251939.

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Liu, Xiaoqun. "Design of multi-channel radio-frequency front-end for 200mhz parallel magnetic resonance imaging." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-3159.

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Chiu, Chi-tat, and 趙志達. "Design and development of a programmable micro-ultrasound research platform with parallel computing capacity." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B46290977.

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Huo, Donglai. "Quantitative Image Quality Evaluation of Fast Magnetic Resonance Imaging." Case Western Reserve University School of Graduate Studies / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=case1155913518.

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Ataseven, Yoldas. "Parallel Implementation Of The Boundary Element Method For Electromagnetic Source Imaging Of The Human Brain." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606548/index.pdf.

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Human brain functions are based on the electrochemical activity and interaction of the neurons constituting the brain. Some brain diseases are characterized by abnormalities of this activity. Detection of the location and orientation of this electrical activity is called electro-magnetic source imaging (EMSI) and is of signicant importance since it promises to serve as a powerful tool for neuroscience. Boundary Element Method (BEM) is a method applicable for EMSI on realistic head geometries that generates large systems of linear equations with dense matrices. Generation and solution of these

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Rayford, II Cleveland Eugene. "Digital Breast Tomosynthesis (DBT) Computational Analysis With Parallel Imaging Configurations To Improve Breast Cancer Detection." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/theses/574.

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The best way to conquer breast cancer is early detection of the disease. Research studies show that earlier detection results in the increase of life span of the affected person. Traditional two-dimensional mammography is the most prevalent method used in detecting breast cancer. Recently, a three-dimensional digital breast tomosynthesis (DBT) system has been created, which is hopeful to surpass the technology of traditional mammography systems. The DBT system can provide three-dimensional information, allowing physicians to reduce the amount of false negative screening in addition to better m

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Vogelgesang, Matthias [Verfasser], and A. [Akademischer Betreuer] Streit. "An Extensible Parallel Computing Framework for Ultra-Fast X-Ray Imaging / Matthias Vogelgesang. Betreuer: A. Streit." Karlsruhe : KIT-Bibliothek, 2014. http://d-nb.info/1073204871/34.

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Vaksdal, Martin. "3D-EPI with parallel imaging acceleration along two Axis : Evaluated with Phantom Study and BOLD fMRI." Thesis, Norges Teknisk-Naturvitenskaplige Universitet, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-20679.

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The function of the human brain has for many years been an intriguing field of research, and has led to the discovery of functional MRI (fMRI). fMRI is dependent on high spatial and temporal resolution to acquire detailed activation maps of the brain. The required high temporal resolution is especially hard to achieve in MRI, as the data acquisition is time consuming. In this work, an accelerated three-dimensional echo planar imaging (3D-EPI) sequence is used to increase the temporal resolution in fMRI. The increased temporal resolution is achieved by accelerating the sequence in two phase enc

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