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SYSTEMS AND METHODS FOR MINIMALLY-INVASIVE OPTICAL-ACOUSTIC IMAGING
专利权人:
Vascular Imaging Corporation
发明人:
Kenneth N. Bates,Gil M. Vardi
申请号:
US14836705
公开号:
US20160007860A1
申请日:
2015.08.26
申请国别(地区):
US
年份:
2016
代理人:
摘要:
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.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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