An annular CMUT array beamforming system for high-frequency side looking IVUS imaging

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dc.authorid0000-0001-9198-8525
dc.contributor.authorSatır, Sarpen_US
dc.contributor.authorGürün, Gökçeen_US
dc.contributor.authorZahorian, Jaime S.en_US
dc.contributor.authorKaraman, Mustafaen_US
dc.contributor.authorHasler, Paul E.en_US
dc.contributor.authorDeğertekin, Fahrettin Leventen_US
dc.date.accessioned2019-08-31T12:10:23Z
dc.date.accessioned2019-08-05T16:04:59Z
dc.date.available2019-08-31T12:10:23Z
dc.date.available2019-08-05T16:04:59Z
dc.date.issued2010
dc.departmentIşık Üniversitesi, Mühendislik Fakültesi, Elektrik-Elektronik Mühendisliği Bölümüen_US
dc.departmentIşık University, Faculty of Engineering, Department of Electrical-Electronics Engineeringen_US
dc.description.abstractA CMUT annular array system for Side-Looking Intravascular Ultrasound (SL-IVUS) with fixed transmit and dynamic receive focusing capabilities has been developed. The system was experimentally characterized and validated through analytical models that simulate the beamformed transducer behavior. An 840 m diameter, 35MHz array was fabricated, characterized, and used in experiments. The array consists of curved 18m by 60m CMUT membranes that form 8 ring transducer elements with approximately equal areas. The beamforming system uses an IC chip consisting of 8 transimpedance amplifiers and delay elements for receive beamforming with adjustable delays between 2ns and 4ns, that are constant up to 50 MHz with close to unity gain. Transmit focusing is implemented with an FPGA controlled, high voltage pulser board that can generate adjustable electrical pulses with delays as small as 2ns. The system is characterized by measuring the radiation patterns of individual CMUT annular array elements as well as the unfocused and fixed transmit focused arrays. The results show predicted behavior including acoustic crosstalk effects at certain frequencies. For transmit-receive beamforming characterization, a 25m gold wire was imaged using 4 beamformed transmit elements and 4 beamformed receive elements with different delay values. The results show improved lateral resolution and lower side lobes with proper beamforming.en_US
dc.description.versionPublisher's Versionen_US
dc.identifier.citationSatir, S., Gürün, G., Zahorian, J., Karaman, M., Hasler, P. & Değertekin, F. L. (2010). An annular CMUT array beamforming system for high-frequency side looking IVUS imaging. Paper presented at the 563-566. doi:10.1109/ULTSYM.2010.5935937en_US
dc.identifier.doi10.1109/ULTSYM.2010.5935937
dc.identifier.endpage566
dc.identifier.isbn9781457703829
dc.identifier.issn1051-0117
dc.identifier.scopus2-s2.0-80054730851
dc.identifier.scopusqualityN/A
dc.identifier.startpage563
dc.identifier.urihttps://hdl.handle.net/11729/1958
dc.identifier.urihttps://dx.doi.org/10.1109/ULTSYM.2010.5935937
dc.indekslendigikaynakScopusen_US
dc.institutionauthorKaraman, Mustafaen_US
dc.language.isoenen_US
dc.peerreviewedYesen_US
dc.publicationstatusPublisheden_US
dc.relation.ispartofProceedings - IEEE Ultrasonics Symposiumen_US
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAnnular arraysen_US
dc.subjectBeamformingen_US
dc.subjectCMUTsen_US
dc.subjectSide Looking Intravascular Ultrasounden_US
dc.titleAn annular CMUT array beamforming system for high-frequency side looking IVUS imagingen_US
dc.typeConference Objecten_US
dspace.entity.typePublication

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