Journal ArticleDOI
Angle Independent Ultrasonic Detection of Blood Flow
TLDR
A new technique for blood velocity imaging based on tracking the motion of the speckle pattern produced by blood, which unlike Doppler velocity determinations, these are angle independent.Abstract:
We present a new technique for blood velocity imaging based on tracking the motion of the speckle pattern produced by blood. Unlike Doppler velocity determinations, these are angle independent. Initial in vivo experiments yield promising results.read more
Citations
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Journal ArticleDOI
Acoustic radiation force impulse imaging: in vivo demonstration of clinical feasibility.
TL;DR: Experimental results are presented demonstrating that displacements on the order of 10 microm can be generated and detected in soft tissues in vivo using a single transducer on a modified diagnostic US scanner and support the clinical feasibility of a radiation force-based remote palpation imaging system.
Journal ArticleDOI
On the feasibility of remote palpation using acoustic radiation force.
TL;DR: The feasibility ofRemote palpation is demonstrated experimentally using breast tissue phantoms with spherical lesion inclusions, and in vitro liver samples and the results show promise for the clinical implementation of remote palpation.
Journal ArticleDOI
Internal displacement and strain imaging using ultrasonic speckle tracking
TL;DR: In this paper, the authors extended the ultrasound speckle tracking method to allow measurement of internal displacement and strain fields over a wide dynamic range of tissue motion, which should lead to enhanced contrast resolution in strain and elasticity images.
Journal ArticleDOI
Shear-wave generation using acoustic radiation force: in vivo and ex vivo results.
TL;DR: Reasonable agreement is demonstrated between structures in matched B-mode and reconstructed modulus images, which suggest the clinical feasibility of radiation force induced shear-wave imaging.
Journal ArticleDOI
A novel method for angle independent ultrasonic imaging of blood flow and tissue motion
L.N. Bohs,Gregg E. Trahey +1 more
TL;DR: A simple algorithm for angle independent motion imaging that requires only one absolute difference operation per pixel, compared to eight operations for normalized cross correlation, makes possible the development of clinical instruments for angleindependent ultrasonic imaging of blood flow and tissue motion in real time.
References
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Journal ArticleDOI
Two-dimensional echocardiography and infarct size: relationship of regional wall motion and thickening to the extent of myocardial infarction in the dog.
A N Lieberman,James L. Weiss,B I Jugdutt,Lewis C. Becker,Bernadine H. Bulkley,J G Garrison,Grover M. Hutchins,C A Kallman,Myron L. Weisfeldt +8 more
TL;DR: Wall motion abnormalities are less precise than thickening in discriminating between infarcts and noninfarcted zones and could lead to overestimation of infarCT size by two-dimensional echocardiography.
Journal ArticleDOI
The development of real-time two-dimensional Doppler echocardiography and its clinical significance in acquired valvular diseases. With special reference to the evaluation of valvular regurgitation.
Ryozo Omoto,Yuji Yokote,Shinichi Takamoto,Shunei Kyo,Ueda K,Haruhiko Asano,Koroku Namekawa,Chihiro Kasai,Yuji Kondo,Akira Koyano +9 more
TL;DR: It is found that 2-D Doppler is very useful in detecting and estimating the severity of valvular regurgitation, and that it may replace conventional angiography in some situations.
Journal ArticleDOI
Speckle Pattern Correlation with Lateral Aperture Translation: Experimental Results and Implications for Spatial Compounding
TL;DR: The experimentally determined correlations are used to derive the optimal spatial separation of images for speckle reduction and are presented for variable frequency, range, transducer length, focus error, and reflecting material.
Journal ArticleDOI
Clinical applications of a new type of real-time two-dimensional doppler flow imaging system
Kunio Miyatake,Mitsunori Okamoto,Naokazu Kinoshita,Shiro Izumi,Mafumi Owa,Seiichi Takao,Hiroshi Sakakibara,Yasuharu Nimura +7 more
TL;DR: A newly developed real-time 2-dimensional Doppler flow imaging technique that clearly visualized the whole aspect of intracardiac blood flow by the cine mode in real time greatly improves the diagnostic efficacy of ultrasound.
Journal ArticleDOI
Computer Analysis of Heart Motion from Two-Dimensional Echocardiograms
TL;DR: This paper presents and tests a computer method to quantify the motion of the heart from digitized image sequences that computes on every point of an image the two-dimensional velocity vector which characterizes its motion from this image to the next.