Imaging Technique

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David Pigott - One of the best experts on this subject based on the ideXlab platform.

  • preliminary experience with a novel intraoperative fluorescence Imaging Technique to evaluate the patency of bypass grafts in total arterial revascularization
    The Annals of Thoracic Surgery, 2003
    Co-Authors: David P Taggart, Bikram P Choudhary, Kyriakos Anastasiadis, Yasir Abuomar, Lognathen Balacumaraswami, David Pigott
    Abstract:

    Abstract Background Early graft failure is a common cause of cardiac morbidity and mortality after coronary artery bypass grafting (CABG), and there is particular concern about graft patency in off-pump CABG. We describe our preliminary experience with a novel Imaging Technique (the SPY system), based on fluorescence of Indocyanine Green when exposed to near infrared light, for the intraoperative assessment of coronary graft patency. Methods Graft patency was assessed in patients undergoing off-pump and on-pump total arterial revascularization. The Imaging Technique requires injection of a 1-mL bolus of Indocyanine Green into the central venous line, followed by Imaging with the SPY system. Results We assessed intraoperative graft patency in 213 conduits in 84 patients (mean, 2.54 grafts per patient), of which, 65 (77%) were done off-pump. It took approximately 3 minutes to image each graft. Skeletonized conduits provided better visualization than pedicled ones. Fluorescence, confirming graft patency, was observed in all but four (1.9%) conduits in 4 (5%) patients. In these latter cases, graft revision was necessitated. Conclusions Fluorescence Imaging of coronary grafts using the SPY is a uniquely simple, safe, noninvasive, and reproducible Technique for intraoperative confirmation of graft patency. In 4 patients, it necessitated revision of the initial intraoperative procedure. Quantification of graft flow would enhance the value of the system.

  • preliminary experience with a novel intraoperative fluorescence Imaging Technique to evaluate the patency of bypass grafts in total arterial revascularization
    The Annals of Thoracic Surgery, 2003
    Co-Authors: David P Taggart, Bikram P Choudhary, Kyriakos Anastasiadis, Yasir Abuomar, Lognathen Balacumaraswami, David Pigott
    Abstract:

    Abstract Background Early graft failure is a common cause of cardiac morbidity and mortality after coronary artery bypass grafting (CABG), and there is particular concern about graft patency in off-pump CABG. We describe our preliminary experience with a novel Imaging Technique (the SPY system), based on fluorescence of Indocyanine Green when exposed to near infrared light, for the intraoperative assessment of coronary graft patency. Methods Graft patency was assessed in patients undergoing off-pump and on-pump total arterial revascularization. The Imaging Technique requires injection of a 1-mL bolus of Indocyanine Green into the central venous line, followed by Imaging with the SPY system. Results We assessed intraoperative graft patency in 213 conduits in 84 patients (mean, 2.54 grafts per patient), of which, 65 (77%) were done off-pump. It took approximately 3 minutes to image each graft. Skeletonized conduits provided better visualization than pedicled ones. Fluorescence, confirming graft patency, was observed in all but four (1.9%) conduits in 4 (5%) patients. In these latter cases, graft revision was necessitated. Conclusions Fluorescence Imaging of coronary grafts using the SPY is a uniquely simple, safe, noninvasive, and reproducible Technique for intraoperative confirmation of graft patency. In 4 patients, it necessitated revision of the initial intraoperative procedure. Quantification of graft flow would enhance the value of the system.

David P Taggart - One of the best experts on this subject based on the ideXlab platform.

  • preliminary experience with a novel intraoperative fluorescence Imaging Technique to evaluate the patency of bypass grafts in total arterial revascularization
    The Annals of Thoracic Surgery, 2003
    Co-Authors: David P Taggart, Bikram P Choudhary, Kyriakos Anastasiadis, Yasir Abuomar, Lognathen Balacumaraswami, David Pigott
    Abstract:

    Abstract Background Early graft failure is a common cause of cardiac morbidity and mortality after coronary artery bypass grafting (CABG), and there is particular concern about graft patency in off-pump CABG. We describe our preliminary experience with a novel Imaging Technique (the SPY system), based on fluorescence of Indocyanine Green when exposed to near infrared light, for the intraoperative assessment of coronary graft patency. Methods Graft patency was assessed in patients undergoing off-pump and on-pump total arterial revascularization. The Imaging Technique requires injection of a 1-mL bolus of Indocyanine Green into the central venous line, followed by Imaging with the SPY system. Results We assessed intraoperative graft patency in 213 conduits in 84 patients (mean, 2.54 grafts per patient), of which, 65 (77%) were done off-pump. It took approximately 3 minutes to image each graft. Skeletonized conduits provided better visualization than pedicled ones. Fluorescence, confirming graft patency, was observed in all but four (1.9%) conduits in 4 (5%) patients. In these latter cases, graft revision was necessitated. Conclusions Fluorescence Imaging of coronary grafts using the SPY is a uniquely simple, safe, noninvasive, and reproducible Technique for intraoperative confirmation of graft patency. In 4 patients, it necessitated revision of the initial intraoperative procedure. Quantification of graft flow would enhance the value of the system.

  • preliminary experience with a novel intraoperative fluorescence Imaging Technique to evaluate the patency of bypass grafts in total arterial revascularization
    The Annals of Thoracic Surgery, 2003
    Co-Authors: David P Taggart, Bikram P Choudhary, Kyriakos Anastasiadis, Yasir Abuomar, Lognathen Balacumaraswami, David Pigott
    Abstract:

    Abstract Background Early graft failure is a common cause of cardiac morbidity and mortality after coronary artery bypass grafting (CABG), and there is particular concern about graft patency in off-pump CABG. We describe our preliminary experience with a novel Imaging Technique (the SPY system), based on fluorescence of Indocyanine Green when exposed to near infrared light, for the intraoperative assessment of coronary graft patency. Methods Graft patency was assessed in patients undergoing off-pump and on-pump total arterial revascularization. The Imaging Technique requires injection of a 1-mL bolus of Indocyanine Green into the central venous line, followed by Imaging with the SPY system. Results We assessed intraoperative graft patency in 213 conduits in 84 patients (mean, 2.54 grafts per patient), of which, 65 (77%) were done off-pump. It took approximately 3 minutes to image each graft. Skeletonized conduits provided better visualization than pedicled ones. Fluorescence, confirming graft patency, was observed in all but four (1.9%) conduits in 4 (5%) patients. In these latter cases, graft revision was necessitated. Conclusions Fluorescence Imaging of coronary grafts using the SPY is a uniquely simple, safe, noninvasive, and reproducible Technique for intraoperative confirmation of graft patency. In 4 patients, it necessitated revision of the initial intraoperative procedure. Quantification of graft flow would enhance the value of the system.

Hugh S. Isaacs - One of the best experts on this subject based on the ideXlab platform.

  • A Difference-Imaging Technique Used to Study Streaking Corrosion of Aluminum Alloys AA7075 and AA8006 in Chloride Solution
    Electrochemical and Solid-State Letters, 2006
    Co-Authors: Ruoshuang Huang, Chang-jian Lin, Hugh S. Isaacs
    Abstract:

    We observed corrosion forming streaks in chloride solutions along abrasion grooves, or grooves formed during rolling, using an in situ difference-Imaging Technique. Streaking occurred on an abraded zinc-containing alloy AA7075-T6, and also on as-received or abraded and heat-treated alloy AA8006, which is representative of alloys known to suffer filiform corrosion. In both alloys, streaking was due to a 50 nm susceptible surface layer. This similarity contrasted with marked differences in how susceptibility developed, i.e., by abrasion in Al-Zn, and thermomechanical treatments in alloys prone to filiform corrosion. Mechanisms are discussed for streaking based on pH changes around growing streaks.

  • A difference-Imaging Technique used to study streaking corrosion of aluminum alloys AA7075 and AA8006 in chloride solution
    'The Electrochemical Society', 2005
    Co-Authors: Huang Ruo-shuang, Lin Chang-jian, Hugh S. Isaacs
    Abstract:

    We observed corrosion forming streaks in chloride solutions along abrasion grooves, or grooves formed during rolling, using an in situ difference-Imaging Technique. Streaking occurred on an abraded zinc-containing alloy AA7075-T6, and also on as-received or abraded and heat-treated alloy AA8006, which is representative of alloys known to suffer filiform corrosion. In both alloys, streaking was due to a 50 nm susceptible surface layer. This similarity contrasted with marked differences in how susceptibility developed, i.e., by abrasion in Al-Zn, and thermomechanical treatments in alloys prone to filiform corrosion. Mechanisms are discussed for streaking based on pH changes around growing streaks. (c) 2005 The Electrochemical Society

Bikram P Choudhary - One of the best experts on this subject based on the ideXlab platform.

  • preliminary experience with a novel intraoperative fluorescence Imaging Technique to evaluate the patency of bypass grafts in total arterial revascularization
    The Annals of Thoracic Surgery, 2003
    Co-Authors: David P Taggart, Bikram P Choudhary, Kyriakos Anastasiadis, Yasir Abuomar, Lognathen Balacumaraswami, David Pigott
    Abstract:

    Abstract Background Early graft failure is a common cause of cardiac morbidity and mortality after coronary artery bypass grafting (CABG), and there is particular concern about graft patency in off-pump CABG. We describe our preliminary experience with a novel Imaging Technique (the SPY system), based on fluorescence of Indocyanine Green when exposed to near infrared light, for the intraoperative assessment of coronary graft patency. Methods Graft patency was assessed in patients undergoing off-pump and on-pump total arterial revascularization. The Imaging Technique requires injection of a 1-mL bolus of Indocyanine Green into the central venous line, followed by Imaging with the SPY system. Results We assessed intraoperative graft patency in 213 conduits in 84 patients (mean, 2.54 grafts per patient), of which, 65 (77%) were done off-pump. It took approximately 3 minutes to image each graft. Skeletonized conduits provided better visualization than pedicled ones. Fluorescence, confirming graft patency, was observed in all but four (1.9%) conduits in 4 (5%) patients. In these latter cases, graft revision was necessitated. Conclusions Fluorescence Imaging of coronary grafts using the SPY is a uniquely simple, safe, noninvasive, and reproducible Technique for intraoperative confirmation of graft patency. In 4 patients, it necessitated revision of the initial intraoperative procedure. Quantification of graft flow would enhance the value of the system.

  • preliminary experience with a novel intraoperative fluorescence Imaging Technique to evaluate the patency of bypass grafts in total arterial revascularization
    The Annals of Thoracic Surgery, 2003
    Co-Authors: David P Taggart, Bikram P Choudhary, Kyriakos Anastasiadis, Yasir Abuomar, Lognathen Balacumaraswami, David Pigott
    Abstract:

    Abstract Background Early graft failure is a common cause of cardiac morbidity and mortality after coronary artery bypass grafting (CABG), and there is particular concern about graft patency in off-pump CABG. We describe our preliminary experience with a novel Imaging Technique (the SPY system), based on fluorescence of Indocyanine Green when exposed to near infrared light, for the intraoperative assessment of coronary graft patency. Methods Graft patency was assessed in patients undergoing off-pump and on-pump total arterial revascularization. The Imaging Technique requires injection of a 1-mL bolus of Indocyanine Green into the central venous line, followed by Imaging with the SPY system. Results We assessed intraoperative graft patency in 213 conduits in 84 patients (mean, 2.54 grafts per patient), of which, 65 (77%) were done off-pump. It took approximately 3 minutes to image each graft. Skeletonized conduits provided better visualization than pedicled ones. Fluorescence, confirming graft patency, was observed in all but four (1.9%) conduits in 4 (5%) patients. In these latter cases, graft revision was necessitated. Conclusions Fluorescence Imaging of coronary grafts using the SPY is a uniquely simple, safe, noninvasive, and reproducible Technique for intraoperative confirmation of graft patency. In 4 patients, it necessitated revision of the initial intraoperative procedure. Quantification of graft flow would enhance the value of the system.

Kyriakos Anastasiadis - One of the best experts on this subject based on the ideXlab platform.

  • preliminary experience with a novel intraoperative fluorescence Imaging Technique to evaluate the patency of bypass grafts in total arterial revascularization
    The Annals of Thoracic Surgery, 2003
    Co-Authors: David P Taggart, Bikram P Choudhary, Kyriakos Anastasiadis, Yasir Abuomar, Lognathen Balacumaraswami, David Pigott
    Abstract:

    Abstract Background Early graft failure is a common cause of cardiac morbidity and mortality after coronary artery bypass grafting (CABG), and there is particular concern about graft patency in off-pump CABG. We describe our preliminary experience with a novel Imaging Technique (the SPY system), based on fluorescence of Indocyanine Green when exposed to near infrared light, for the intraoperative assessment of coronary graft patency. Methods Graft patency was assessed in patients undergoing off-pump and on-pump total arterial revascularization. The Imaging Technique requires injection of a 1-mL bolus of Indocyanine Green into the central venous line, followed by Imaging with the SPY system. Results We assessed intraoperative graft patency in 213 conduits in 84 patients (mean, 2.54 grafts per patient), of which, 65 (77%) were done off-pump. It took approximately 3 minutes to image each graft. Skeletonized conduits provided better visualization than pedicled ones. Fluorescence, confirming graft patency, was observed in all but four (1.9%) conduits in 4 (5%) patients. In these latter cases, graft revision was necessitated. Conclusions Fluorescence Imaging of coronary grafts using the SPY is a uniquely simple, safe, noninvasive, and reproducible Technique for intraoperative confirmation of graft patency. In 4 patients, it necessitated revision of the initial intraoperative procedure. Quantification of graft flow would enhance the value of the system.

  • preliminary experience with a novel intraoperative fluorescence Imaging Technique to evaluate the patency of bypass grafts in total arterial revascularization
    The Annals of Thoracic Surgery, 2003
    Co-Authors: David P Taggart, Bikram P Choudhary, Kyriakos Anastasiadis, Yasir Abuomar, Lognathen Balacumaraswami, David Pigott
    Abstract:

    Abstract Background Early graft failure is a common cause of cardiac morbidity and mortality after coronary artery bypass grafting (CABG), and there is particular concern about graft patency in off-pump CABG. We describe our preliminary experience with a novel Imaging Technique (the SPY system), based on fluorescence of Indocyanine Green when exposed to near infrared light, for the intraoperative assessment of coronary graft patency. Methods Graft patency was assessed in patients undergoing off-pump and on-pump total arterial revascularization. The Imaging Technique requires injection of a 1-mL bolus of Indocyanine Green into the central venous line, followed by Imaging with the SPY system. Results We assessed intraoperative graft patency in 213 conduits in 84 patients (mean, 2.54 grafts per patient), of which, 65 (77%) were done off-pump. It took approximately 3 minutes to image each graft. Skeletonized conduits provided better visualization than pedicled ones. Fluorescence, confirming graft patency, was observed in all but four (1.9%) conduits in 4 (5%) patients. In these latter cases, graft revision was necessitated. Conclusions Fluorescence Imaging of coronary grafts using the SPY is a uniquely simple, safe, noninvasive, and reproducible Technique for intraoperative confirmation of graft patency. In 4 patients, it necessitated revision of the initial intraoperative procedure. Quantification of graft flow would enhance the value of the system.