Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/207994
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dc.contributor.authorMingyue Yuen_US
dc.contributor.authorYang Lien_US
dc.contributor.authorTeng Maen_US
dc.contributor.authorK. Kirk Shungen_US
dc.contributor.authorQifa Zhouen_US
dc.date.accessioned2013en_US
dc.date.accessioned2020-04-06T07:57:47Z-
dc.date.available2020-04-06T07:57:47Z-
dc.date.issued2017en_US
dc.identifier.other10.1109/TMI.2017.2723479en_US
dc.identifier.urihttp://localhost/handle/Hannan/207994-
dc.description.abstractIntravascular ultrasound (IVUS) has been frequently used for coronary artery imaging clinically. More importantly, IVUS is the fundamental image modality for most advanced multimodality intravascular imaging techniques, since it provides a more comprehensive picture of vessel anatomy on which other imaging data can be superimposed. However, image quality in the deeper region is poor because of the downgraded lateral resolution and contrast-to-noise ratio (CNR). In this paper, we report on the application of an ultrasound beamforming method that combines virtual source synthetic aperture (VSSA) focusing and coherence factor weighting (CFW) to improve the IVUS image quality. The natural focal point of conventional IVUS transducer was treated as a virtual source that emits spherical waves within a certain region. Mono-static synthetic aperture focusing was conducted to achieve higher resolution. Coherence factor was calculated using delayed RF signals and applied to the synthesized beam to increase the CNR and focusing quality. The proposed method was tested through simulations in Field II and imaging experiments in both linear and rotational scans. The lateral resolution for linear scan mode is improved from 165-524 to 126-143 &x03BC;m ; resolution for rotational scan mode improves by up to 42%. CNR improvement by up to 1.5 was observed on the anechoic cysts of different sizes and at different locations. Herein, it is demonstrated that the beamforming method, which combines VSSA and CFW, can significantly improve the IVUS image quality. This approach can be readily integrated into the current IVUS imaging system for enhanced clinical diagnosis.en_US
dc.format.extent2171,en_US
dc.format.extent2178en_US
dc.publisherIEEEen_US
dc.relation.haspart7968375.pdfen_US
dc.titleIntravascular Ultrasound Imaging With Virtual Source Synthetic Aperture Focusing and Coherence Factor Weightingen_US
dc.typeArticleen_US
dc.journal.volume36en_US
dc.journal.issue10en_US
Appears in Collections:2017

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7968375.pdf2.48 MBAdobe PDF
Full metadata record
DC FieldValueLanguage
dc.contributor.authorMingyue Yuen_US
dc.contributor.authorYang Lien_US
dc.contributor.authorTeng Maen_US
dc.contributor.authorK. Kirk Shungen_US
dc.contributor.authorQifa Zhouen_US
dc.date.accessioned2013en_US
dc.date.accessioned2020-04-06T07:57:47Z-
dc.date.available2020-04-06T07:57:47Z-
dc.date.issued2017en_US
dc.identifier.other10.1109/TMI.2017.2723479en_US
dc.identifier.urihttp://localhost/handle/Hannan/207994-
dc.description.abstractIntravascular ultrasound (IVUS) has been frequently used for coronary artery imaging clinically. More importantly, IVUS is the fundamental image modality for most advanced multimodality intravascular imaging techniques, since it provides a more comprehensive picture of vessel anatomy on which other imaging data can be superimposed. However, image quality in the deeper region is poor because of the downgraded lateral resolution and contrast-to-noise ratio (CNR). In this paper, we report on the application of an ultrasound beamforming method that combines virtual source synthetic aperture (VSSA) focusing and coherence factor weighting (CFW) to improve the IVUS image quality. The natural focal point of conventional IVUS transducer was treated as a virtual source that emits spherical waves within a certain region. Mono-static synthetic aperture focusing was conducted to achieve higher resolution. Coherence factor was calculated using delayed RF signals and applied to the synthesized beam to increase the CNR and focusing quality. The proposed method was tested through simulations in Field II and imaging experiments in both linear and rotational scans. The lateral resolution for linear scan mode is improved from 165-524 to 126-143 &x03BC;m ; resolution for rotational scan mode improves by up to 42%. CNR improvement by up to 1.5 was observed on the anechoic cysts of different sizes and at different locations. Herein, it is demonstrated that the beamforming method, which combines VSSA and CFW, can significantly improve the IVUS image quality. This approach can be readily integrated into the current IVUS imaging system for enhanced clinical diagnosis.en_US
dc.format.extent2171,en_US
dc.format.extent2178en_US
dc.publisherIEEEen_US
dc.relation.haspart7968375.pdfen_US
dc.titleIntravascular Ultrasound Imaging With Virtual Source Synthetic Aperture Focusing and Coherence Factor Weightingen_US
dc.typeArticleen_US
dc.journal.volume36en_US
dc.journal.issue10en_US
Appears in Collections:2017

Files in This Item:
File SizeFormat 
7968375.pdf2.48 MBAdobe PDF
Full metadata record
DC FieldValueLanguage
dc.contributor.authorMingyue Yuen_US
dc.contributor.authorYang Lien_US
dc.contributor.authorTeng Maen_US
dc.contributor.authorK. Kirk Shungen_US
dc.contributor.authorQifa Zhouen_US
dc.date.accessioned2013en_US
dc.date.accessioned2020-04-06T07:57:47Z-
dc.date.available2020-04-06T07:57:47Z-
dc.date.issued2017en_US
dc.identifier.other10.1109/TMI.2017.2723479en_US
dc.identifier.urihttp://localhost/handle/Hannan/207994-
dc.description.abstractIntravascular ultrasound (IVUS) has been frequently used for coronary artery imaging clinically. More importantly, IVUS is the fundamental image modality for most advanced multimodality intravascular imaging techniques, since it provides a more comprehensive picture of vessel anatomy on which other imaging data can be superimposed. However, image quality in the deeper region is poor because of the downgraded lateral resolution and contrast-to-noise ratio (CNR). In this paper, we report on the application of an ultrasound beamforming method that combines virtual source synthetic aperture (VSSA) focusing and coherence factor weighting (CFW) to improve the IVUS image quality. The natural focal point of conventional IVUS transducer was treated as a virtual source that emits spherical waves within a certain region. Mono-static synthetic aperture focusing was conducted to achieve higher resolution. Coherence factor was calculated using delayed RF signals and applied to the synthesized beam to increase the CNR and focusing quality. The proposed method was tested through simulations in Field II and imaging experiments in both linear and rotational scans. The lateral resolution for linear scan mode is improved from 165-524 to 126-143 &x03BC;m ; resolution for rotational scan mode improves by up to 42%. CNR improvement by up to 1.5 was observed on the anechoic cysts of different sizes and at different locations. Herein, it is demonstrated that the beamforming method, which combines VSSA and CFW, can significantly improve the IVUS image quality. This approach can be readily integrated into the current IVUS imaging system for enhanced clinical diagnosis.en_US
dc.format.extent2171,en_US
dc.format.extent2178en_US
dc.publisherIEEEen_US
dc.relation.haspart7968375.pdfen_US
dc.titleIntravascular Ultrasound Imaging With Virtual Source Synthetic Aperture Focusing and Coherence Factor Weightingen_US
dc.typeArticleen_US
dc.journal.volume36en_US
dc.journal.issue10en_US
Appears in Collections:2017

Files in This Item:
File SizeFormat 
7968375.pdf2.48 MBAdobe PDF