Intravascular extended sensitivity (IVES) MRI antennas

dc.citation.epage390en_US
dc.citation.issueNumber2en_US
dc.citation.spage383en_US
dc.citation.volumeNumber50en_US
dc.contributor.authorSusil, R. C.en_US
dc.contributor.authorYeung, C. J.en_US
dc.contributor.authorAtalar, Erginen_US
dc.contributor.bilkentauthorAtalar, Ergin
dc.date.accessioned2016-02-08T10:29:38Z
dc.date.available2016-02-08T10:29:38Z
dc.date.issued2003en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractThe design and application of an intravascular extended sensitivity (IVES) MRI antenna is described. The device is a loopless antenna design that incorporates both an insulating, dielectric coating and a winding of the antenna whip into a helical shape. Because this antenna produces a broad region of high SNR and also allows for imaging near the tip of the device, it is useful for imaging long, luminal structures. To elucidate the design and function of this device, the effects of both insulation and antenna winding were characterized by theoretical and experimental studies. Insulation broadens the longitudinal region over which images can be collected (i.e., along the lumen of a vessel) by increasing the resonant pole length. Antenna winding, conversely, allows for imaging closer to the tip of the antenna by decreasing the resonant pole length. Over a longitudinal region of 20 cm, the IVES imaging antenna described here produces a system SNR of approximately 40,000/r (mL-1Hz1/2), where r is the radial distance from the antenna axis in centimeters. As opposed to microcoil antenna designs, these antennas do not require exact positioning and allow for imaging over broad tissue regions. While focusing on the design of the IVES antenna, this work also serves to enhance our overall understanding of the properties and behavior of the loopless antenna design. © 2003 Wiley-Liss, Inc.en_US
dc.identifier.doi10.1002/mrm.10506en_US
dc.identifier.issn0740-3194
dc.identifier.urihttp://hdl.handle.net/11693/24453
dc.language.isoEnglishen_US
dc.publisherJohn Wiley & Sons, Incen_US
dc.relation.isversionofhttp://dx.doi.org/10.1002/mrm.10506en_US
dc.source.titleMagnetic Resonance in Medicineen_US
dc.subjectGuidewireen_US
dc.subjectHelical antennaen_US
dc.subjectInsulationen_US
dc.subjectLoopless antennaen_US
dc.subjectMRIen_US
dc.subjectSystem SNRen_US
dc.subjectVascular imagingen_US
dc.subjectAntennaen_US
dc.subjectDeviceen_US
dc.subjectExperimental testen_US
dc.subjectIntravascular extended sensitivityen_US
dc.subjectNonhumanen_US
dc.subjectNuclear magnetic resonance imagingen_US
dc.subjectTheoryen_US
dc.subjectVesselen_US
dc.subjectAnimalsen_US
dc.subjectCatheterizationen_US
dc.subjectDogsen_US
dc.subjectEquipment Designen_US
dc.subjectMagnetic Resonance Angiographyen_US
dc.titleIntravascular extended sensitivity (IVES) MRI antennasen_US
dc.typeArticleen_US
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