Vascular Imaging Corporation Patent applications |
Patent application number | Title | Published |
20140316281 | NOISE SUBTRACTION FOR INTRA-BODY FIBER OPTIC SENSOR - An optical source can generally provide optical energy having phase noise. Such phase noise, when demodulated using an intravascularly-deliverable optical fiber transducer, can be indistinguishable from a signal of interest. Apparatus or techniques can include using one or more of a reference optical cavity or a delay line, such as to obtain information indicative of the phase noise of the optical source. Such information can then be reduced or suppressed from other information obtained from the intravascularly-deliverable optical fiber transducer, such as to improve a signal-to-noise (SNR) ratio of a sensing system including the intravascularly-deliverable optical fiber transducer. | 10-23-2014 |
20140254975 | SYSTEMS AND METHODS FOR MINIMALLY-INVASIVE OPTICAL-ACOUSTIC IMAGING - An imaging guidewire can include one or more optical fibers communicating light along the guidewire. At or near its distal end, one or more blazed or other fiber Bragg gratings (FBGs) directs light to a photoacoustic transducer material that provides ultrasonic imaging energy. Returned ultrasound is sensed by an FBG sensor. A responsive signal is optically communicated to the proximal end of the guidewire, and processed to develop a 2D or 3D image. In one example, the guidewire outer diameter is small enough such that an intravascular catheter can be passed over the guidewire. Techniques for improving ultrasound reception include using a high compliance material, resonating the ultrasound sensing transducer, using an attenuation-reducing coating and/or thickness, and/or using optical wavelength discrimination. Techniques for improving the ultrasound generating transducer include using a blazed FBG, designing the photoacoustic material thickness to enhance optical absorption. Techniques for distinguishing plaque or vulnerable plaque may be used to enhance the displayed image. | 09-11-2014 |
20140101922 | OPTICAL IMAGING PROBE CONNECTOR - An elongated optical guidewire assembly, such as for optically imaging a patient from within another catheter, can have a lead portion and a probe portion. A connector between the lead and probe portions can include a bore including first and second bore ends. The first bore end can include a substantially circular cross-sectional profile. The second bore end can include a substantially non-circular cross-sectional profile. The bore can be configured to receive the optical guidewire assembly at the first bore end and configured to deform the optical guidewire assembly at the second bore end such that probe and lead ends of the optical guidewire assembly are deformed into a substantially non-circular profile and located between the first and second bore ends. | 04-17-2014 |
20140100462 | POLARIZATION SCRAMBLING FOR INTRA-BODY FIBER OPTIC SENSOR - In an example, an optical system can include a polarization scrambler coupleable to a tunable first optical source configured to generate a coherent optical output. The system can include an intra-body optical sensor such as a an intravascularly-deliverable optical fiber transducer, configured to be coupled to the tunable first optical source through the polarization scrambler, the polarization scrambler configured to vary a polarization state of the optical energy provided by the tunable first optical source, the intravascularly-deliverable optical fiber transducer configured to reflect a portion of the optical energy modulated in response to a vibration, pressure, or strain. The system can include a processor circuit configured to obtain information indicative of the optical energy reflected from the intravascularly-deliverable optical fiber transducer, and to process information from the vibration, pressure, or strain modulating the optical energy from the intravascularly-deliverable optical fiber transducer using different polarization states established by the polarization scrambler. | 04-10-2014 |
20130317372 | OPTICAL FIBER PRESSURE SENSOR GUIDEWIRE - In an example, this document discloses an apparatus for insertion into a body lumen, the apparatus comprising an optical fiber pressure sensor. The optical fiber pressure sensor comprises an optical fiber configured to transmit an optical sensing signal, a temperature compensated Fiber Bragg Grating (FBG) interferometer in optical communication with the optical fiber, the FBG interferometer configured to receive a pressure and modulate, in response to the received pressure, the optical sensing signal, and a sensor membrane in physical communication with the FBG interferometer, the membrane configured to transmit the received pressure to the FBG interferometer. | 11-28-2013 |
20130178729 | SYSTEMS AND METHODS FOR MINIMALLY-INVASIVE OPTICAL-ACOUSTIC IMAGING - An imaging guidewire can include one or more optical fibers communicating light along the guidewire. At or near its distal end, one or more blazed or other fiber Bragg gratings (FBGs) directs light to a photoacoustic transducer material that provides ultrasonic imaging energy. Returned ultrasound is sensed by an FBG sensor. A responsive signal is optically communicated to the proximal end of the guidewire, and processed to develop a 2D or 3D image. In one example, the guidewire outer diameter is small enough such that an intravascular catheter can be passed over the guidewire. Techniques for improving ultrasound reception include using a high compliance material, resonating the ultrasound sensing transducer, using an attenuation-reducing coating and/or thickness, and/or using optical wavelength discrimination. Techniques for improving the ultrasound generating transducer include using a blazed FBG, designing the photoacoustic material thickness to enhance optical absorption. Techniques for distinguishing plaque or vulnerable plaque may be used to enhance the displayed image. | 07-11-2013 |
20130148933 | OPTICAL IMAGING PROBE - This document discusses, among other things, a connector for an optical imaging probe that includes one or more optical fibers communicating light along the catheter. The device may use multiple sections for simpler manufacturing and ease of assembly during a medical procedure. Light energy to and from a distal minimally-invasive portion of the probe is coupled by the connector to external diagnostic or analytical instrumentation through an external instrumentation lead. Certain examples provide a self-aligning two-section optical catheter with beveled ends, which is formed by separating an optical cable assembly. Techniques for improving light coupling include using a lens between instrumentation lead and probe portions. Techniques for improving the mechanical alignment of a multi-optical fiber catheter include using a stop or a guide. | 06-13-2013 |
20120108943 | SYSTEMS AND METHODS FOR MINIMALLY-INVASIVE OPTICAL-ACOUSTIC IMAGING - An imaging guidewire can include optical fibers communicating light along the guidewire. At or near its distal end, one or more blazed or other fiber Bragg gratings (FBGs) directs light to a photoacoustic transducer material that provides ultrasonic imaging energy. Returned ultrasound is sensed by an FBG sensor. A responsive signal is optically communicated to the proximal end of the guidewire, and processed to develop a 2D or 3D image. The guidewire outer diameter is small enough such that an intravascular catheter can be passed over the guidewire. Techniques for improving ultrasound reception include using a high compliance material, resonating the ultrasound sensing transducer, using an attenuation-reducing coating and/or thickness, and/or using optical wavelength discrimination. Techniques for improving the ultrasound generating transducer include using a blazed FBG, designing the photoacoustic material thickness to enhance optical absorption. Techniques for distinguishing plaque or vulnerable plaque may enhance the displayed image. | 05-03-2012 |
20110123154 | OPTICAL IMAGING PROBE CONNECTOR - This document discusses, among other things, a connector for an optical imaging probe that includes one or more optical fibers communicating light along the catheter. The device may use multiple sections for simpler manufacturing and ease of assembly during a medical procedure. Light energy to and from a distal minimally-invasive portion of the probe is coupled by the connector to external diagnostic or analytical instrumentation through an external instrumentation lead. Certain examples provide a self-aligning two-section optical catheter with beveled ends, which is formed by separating an optical cable assembly. Techniques for improving light coupling include using a lens between instrumentation lead and probe portions. Techniques for improving the mechanical alignment of a multi-optical fiber catheter include using a stop or a guide. | 05-26-2011 |
20100135111 | SYSTEMS AND METHODS FOR MINIMALLY-INVASIVE OPTICAL-ACOUSTIC IMAGING - An imaging guidewire can include one or more optical fibers communicating light along the guidewire. At or near its distal end, one or more blazed or other fiber Bragg gratings (FBGs) directs light to a photoacoustic transducer material that provides ultrasonic imaging energy. Returned ultrasound is sensed by an FBG sensor. A responsive signal is optically communicated to the proximal end of the guidewire, and processed to develop a 2D or 3D image. In one example, the guidewire outer diameter is small enough such that an intravascular catheter can be passed over the guidewire. Techniques for improving ultrasound reception include using a high compliance material, resonating the ultrasound sensing transducer, using an attenuation-reducing coating and/or thickness, and/or using optical wavelength discrimination. Techniques for improving the ultrasound generating transducer include using a blazed FBG, designing the photoacoustic material thickness to enhance optical absorption. Techniques for distinguishing plaque or vulnerable plaque may be used to enhance the displayed image. | 06-03-2010 |
20100113942 | OPTICAL IMAGING PROBE CONNECTOR - An elongated optical guidewire assembly, such as for optically imaging a patient from within another catheter, can have a lead portion and a probe portion. A connector between the lead and probe portions can include a bore including first and second bore ends. The first bore end can include a substantially circular cross-sectional profile. The second bore end can include a substantially non-circular cross-sectional profile. The bore can be configured to receive the optical guidewire assembly at the first bore end and configured to deform the optical guidewire assembly at the second bore end such that probe and lead ends of the optical guidewire assembly are deformed into a substantially non-circular profile and located between the first and second bore ends. | 05-06-2010 |
20100087732 | OPTICAL ULTRASOUND RECEIVER - An imaging guidewire can include one or more optical fibers communicating light along the guidewire. At or near its distal end, one or more blazed or other Fiber Bragg Gratings (FBGs) can direct light to a photoacoustic transducer material that provides ultrasonic imaging energy. Returned ultrasound can be sensed by an FBG sensor. A responsive signal can be optically communicated to the proximal end of the guidewire, and processed such as to develop a 2D or 3D image. In an example, the guidewire outer diameter can be small enough such that an intravascular catheter can be passed over the guidewire. To minimize the size of the guidewire, an ultrasound-to-acoustic transducer that is relatively insensitive to the polarization of the optical sensing signal can be used. The ultrasound-to-optical transducer can be manufactured so that it is relatively insensitive to the polarization of the optical sensing signal. | 04-08-2010 |
20100014810 | OPTICAL IMAGING PROBE CONNECTOR - This document discusses, among other things, a connector for an optical imaging probe that includes one or more optical fibers communicating light along the catheter. The device may use multiple sections for simpler manufacturing and ease of assembly during a medical procedure. Light energy to and from a distal minimally-invasive portion of the probe is coupled by the connector to external diagnostic or analytical instrumentation through an external instrumentation lead. Certain examples provide a self-aligning two-section optical catheter with beveled ends, which is formed by separating an optical cable assembly. Techniques for improving light coupling include using a lens between instrumentation lead and probe portions. Techniques for improving the mechanical alignment of a multi-optical fiber catheter include using a stop or a guide. | 01-21-2010 |
20090059727 | SYSTEMS AND METHODS FOR MINIMALLY-INVASIVE OPTICAL-ACOUSTIC IMAGING - An imaging guidewire can include one or more optical fibers communicating light along the guidewire. At or near its distal end, one or more blazed or other fiber Bragg gratings (FBGs) directs light to a photoacoustic transducer material that provides ultrasonic imaging energy. Returned ultrasound is sensed by an FBG sensor. A responsive signal is optically communicated to the proximal end of the guidewire, and processed to develop a 2D or 3D image. In one example, the guidewire outer diameter is small enough such that an intravascular catheter can be passed over the guidewire. Techniques for improving ultrasound reception include using a high compliance material, resonating the ultrasound sensing transducer, using an attenuation-reducing coating and/or thickness, and/or using optical wavelength discrimination. Techniques for improving the ultrasound generating transducer include using a blazed FBG, designing the photoacoustic material thickness to enhance optical absorption. Techniques for distinguishing plaque or vulnerable plaque may be used to enhance the displayed image. | 03-05-2009 |