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Beat frequency ultrasonic microsphere contrast agent detection systemA system for and method of detecting and measuring concentrations of an ultrasonically-reflective microsphere contrast agent involving detecting non-linear sum and difference beat frequencies produced by the microspheres when two impinging signals with non-identical frequencies are combined by mixing. These beat frequencies can be used for a variety of applications such as detecting the presence of and measuring the flow rates of biological fluids and industrial liquids, including determining the concentration level of microspheres in the myocardium.
Document ID
19960001467
Acquisition Source
Legacy CDMS
Document Type
Other - Patent Application
Authors
Pretlow, Robert A., III (NASA Langley Research Center Hampton, VA, United States)
Yost, William T. (NASA Langley Research Center Hampton, VA, United States)
Cantrell, John H., Jr. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 17, 2013
Publication Date
May 12, 1995
Subject Category
Aerospace Medicine
Report/Patent Number
NAS 1.71:LAR-15211-1
Report Number: NAS 1.71:LAR-15211-1
Patent Number: NASA-CASE-LAR-15211-1
Patent Application Number: US-PATENT-APPL-SN-440266
Accession Number
96N11474
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-CASE-LAR-15211-1
Patent Application
US-PATENT-APPL-SN-440266

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