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dc.contributor.advisorYtterdal, Trondnb_NO
dc.contributor.authorMainou Gomez, José Francisconb_NO
dc.date.accessioned2014-12-19T13:47:35Z
dc.date.accessioned2015-12-22T11:46:41Z
dc.date.available2014-12-19T13:47:35Z
dc.date.available2015-12-22T11:46:41Z
dc.date.created2012-11-08nb_NO
dc.date.issued2012nb_NO
dc.identifier566038nb_NO
dc.identifierntnudaim:6871
dc.identifier.urihttp://hdl.handle.net/11250/2370499
dc.description.abstractReverberation is defined as equally-spaced, bright linear echoes resulting from reflection from specular-type interfaces. They are provoked by the acoustic Impedance change between the tissue and transducer front surface. B. Angelsen developed a mathematical approach to correct this ultrasound artifact by coupling the ultrasound transducer with an ideal electrical load in order to obtain zero reflection coefficients on the transducer from face [1]. However, when analyzing Impedance spectroscopy this approach cannot be achieved by using passive electronics in most simulated cases. Active impedance may be seen as a trend to improve image quality. This research therefore implements and simulates methods for active impedance synthesis [5] and applies Particle Swarm Optimization to the proposed electronics. Finally, the simulations are compared through a LAB experiment.nb_NO
dc.languageengnb_NO
dc.publisherInstitutt for elektronikk og telekommunikasjonnb_NO
dc.subjectntnudaim:6871no_NO
dc.subjectMSMEDTEK Medical Technology
dc.subjectMedical Imaging
dc.titleAmplifier for optimal reflection Coefficient of ultrasound transducer: A study of op amp based circuits for ultrasound transducers, targeted for low reflection Coefficient, high gain, and low noisenb_NO
dc.typeMaster thesisnb_NO
dc.source.pagenumber67nb_NO
dc.contributor.departmentNorges teknisk-naturvitenskapelige universitet, Fakultet for informasjonsteknologi, matematikk og elektroteknikk, Institutt for elektronikk og telekommunikasjonnb_NO


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