Ultimate intrinsic SNR in magnetic resonance imaging by optimizing the EM field generated by internal coils

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buir.advisorAtalar, Ergin
dc.contributor.authorAbdel-Hafez, Imad Amin
dc.date.accessioned2016-01-08T20:17:27Z
dc.date.available2016-01-08T20:17:27Z
dc.date.issued2000
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.descriptionAnkara : The Department of Electrical and Electronics Engineering and the Institute of Engineering and Science of Bilkent Univ., 2000.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 2000.en_US
dc.descriptionIncludes bibliographical references leaves 95-97.en_US
dc.description.abstractA method to find the ultimate intrinsic signal-to-noise ratio (ISNR) in a magnetic resonance imaging experiment is applied to a human body model. The method uses cylindrical wave expansion to represent an arbitrary electromagnetic field inside the body. This field is optimized to give the maximum possible ISNR for some point of interest from which the signal is received, and repeated for all points inside the body. Optimization is conducted by finding the set of coefficients associated with expansion modes that give the maximum ISNR. Application of this method enables the determination of the ultimate ISNR and the associated optimum electromagnetic field without the necessity of finding the receiving coil configuration needed to obtain the ultimate value of ISNR. Results of this work can be used to examine the efficiency of already available commercial coils and how far they can be improved. Moreover, the solution can be used to determine the performance difference between internal and external Magnetic Resonance Imaging (MRI) coils. Finally, knowledge of the optimum electromagnetic field inside the human body can be used to find the coil configuration that can radiate this field by solving an inverse problem.en_US
dc.description.degreeM.S.en_US
dc.description.statementofresponsibilityAbdel-Hafez, Imad Aminen_US
dc.format.extentx, 97 leavesen_US
dc.identifier.urihttp://hdl.handle.net/11693/18231
dc.language.isoEnglishen_US
dc.publisherBilkent Universityen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectMagnecic Resonance Imaging (MRI)en_US
dc.subjectWave equationen_US
dc.subjectCylindrical wave representationen_US
dc.subjectConstraint optimizationen_US
dc.subject.lccWN445 .A33 2000en_US
dc.subject.lcshMagnetic resonance imaging.en_US
dc.subject.lcshWave equation--Numerical solution.en_US
dc.titleUltimate intrinsic SNR in magnetic resonance imaging by optimizing the EM field generated by internal coilsen_US
dc.typeThesisen_US
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