NDLI: Compact angular support beams for space-invariant vector flow mapping

Content Provider	IEEE Xplore Digital Library
Author	Kadah, Y.M. Tewfik, A.H.
Copyright Year	1995
Description	Author affiliation: Biomed. & Electr. Eng. Program, Minnesota Univ., Minneapolis, MN, USA (Kadah, Y.M.)
Abstract	The authors define a special class of compact angular spectrum beams (CASBs) that can be used to provide space-invariant estimation of the velocity vector from a single coplanar aperture. By space-invariance the authors mean both range and azimuth flow shift-invariance of velocity estimation. They analytically show that some of the non-diffractive beams, e.g., Bessel beams, are sub-classes of CASBs. They show that CASBs have infinite spatial support and thus, they cannot be generated in practice. They discuss finite support approximation of such beams. These approximations can be implemented using currently available annular and two-dimensional transducer arrays. The authors also describe the related class of spatially modulated CASBs. These beams provide range-invariant true-velocity estimation from frequency shift measurements.
Starting Page	1489
Ending Page	1492
File Size	309229
Page Count	4
File Format	PDF
ISBN	0780329406
ISSN	10510117
DOI	10.1109/ULTSYM.1995.495837
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-11-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Apertures Differential equations Ultrasonic transducers Biomedical measurements Ultrasonic imaging Azimuth Frequency measurement Fluid flow measurement Velocity measurement Ultrasonography
Content Type	Text
Resource Type	Article

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