dc.contributor.advisor | Ytterdal, Trond | nb_NO |
dc.contributor.author | Mainou Gomez, José Francisco | nb_NO |
dc.date.accessioned | 2014-12-19T13:47:35Z | |
dc.date.accessioned | 2015-12-22T11:46:41Z | |
dc.date.available | 2014-12-19T13:47:35Z | |
dc.date.available | 2015-12-22T11:46:41Z | |
dc.date.created | 2012-11-08 | nb_NO |
dc.date.issued | 2012 | nb_NO |
dc.identifier | 566038 | nb_NO |
dc.identifier | ntnudaim:6871 | |
dc.identifier.uri | http://hdl.handle.net/11250/2370499 | |
dc.description.abstract | Reverberation 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.language | eng | nb_NO |
dc.publisher | Institutt for elektronikk og telekommunikasjon | nb_NO |
dc.subject | ntnudaim:6871 | no_NO |
dc.subject | MSMEDTEK Medical Technology | |
dc.subject | Medical Imaging | |
dc.title | Amplifier 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 noise | nb_NO |
dc.type | Master thesis | nb_NO |
dc.source.pagenumber | 67 | nb_NO |
dc.contributor.department | Norges teknisk-naturvitenskapelige universitet, Fakultet for informasjonsteknologi, matematikk og elektroteknikk, Institutt for elektronikk og telekommunikasjon | nb_NO |