PatentDOI
Cardiac motion tracking using cine harmonic phase (harp) magnetic resonance imaging
Jerry L. Prince,Nael F. Osman +1 more
TLDR
A new computational approach permits rapid analysis and visualization of myocardial strain within 5–10 min after the scan is complete, and its performance is demonstrated on MR image sequences reflecting both normal and abnormal cardiac motion.Abstract:
The present invention relates to a method of measuring motion of an object such as a heart by magnetic resonance imaging. A pulse sequence is applied to spatially modulate a region of interest of the object and at least one first spectral peak is acquired from the Fourier domain of the spatially modulated object. The inverse Fourier transform information of the acquired first spectral-peaks is computed and a computed first harmonic phase image is determined from each spectral peak. The process is repeated to create a second harmonic phase image from each second spectral peak and the strain is determined from the first and second harmonic phase images. In a preferred embodiment, the method is employed to determine strain within the myocardium and to determine change in position of a point at two different times which may result in an increased distance or reduced distance. The method may be employed to determine the path of motion of a point through a sequence of tag images depicting movement of the heart. The method may be employed to determine circumferential strain and radial strain.read more
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Journal ArticleDOI
ACCF/ACR/AHA/NASCI/SCMR 2010 Expert Consensus Document on Cardiovascular Magnetic Resonance A Report of the American College of Cardiology Foundation Task Force on Expert Consensus Documents
W. Gregory Hundley,David A. Bluemke,J. Paul Finn,Scott D. Flamm,Mark A. Fogel,Matthias G. Friedrich,Vincent B. Ho,Vincent B. Ho,Michael Jerosch-Herold,Christopher M. Kramer,Warren J. Manning,Manesh R. Patel,Gerald M. Pohost,Arthur E. Stillman,Richard D. White,Pamela K. Woodard +15 more
TL;DR: This dissertation aims to provide a history of FACC-FAHA education in the United States from 1989 to 2002, a period chosen in order to explore its roots as well as specific cases up to and including the year in which FACC was introduced.
Journal ArticleDOI
Measurement of ventricular torsion by two-dimensional ultrasound speckle tracking imaging
Yuichi Notomi,Peter Lysyansky,Randolph M. Setser,Takahiro Shiota,Zoran B. Popović,Maureen G. Martin-Miklovic,Joan A. Weaver,Stephanie J. Oryszak,Neil L. Greenberg,Richard D. White,James D. Thomas +10 more
TL;DR: The STI estimation of LVtor is concordant with those analyzed by tagged MRI and also showed good agreement with those by DTI (data derived from tissue velocity) and may make the assessment more available in clinical and research cardiology.
Journal ArticleDOI
Three-dimensional modeling for functional analysis of cardiac images, a review
TL;DR: 3-D model-based approaches have the capability to improve the diagnostic value of cardiac images, but issues as robustness, 3-D interaction, computational complexity and clinical validation still require significant attention.
Journal ArticleDOI
Expert Consensus DocumentACCF/ACR/AHA/NASCI/SCMR 2010 Expert Consensus Document on Cardiovascular Magnetic Resonance: A Report of the American College of Cardiology Foundation Task Force on Expert Consensus Documents
W. Gregory Hundley,David A. Bluemke,J. Paul Finn,Scott D. Flamm,Mark A. Fogel,Matthias G. Friedrich,Vincent B. Ho,Michael Jerosch-Herold,Christopher M. Kramer,Warren J. Manning,Manesh R. Patel,Gerald M. Pohost,Arthur E. Stillman,Richard D. White,Pamela K. Woodard +14 more
TL;DR: The findings and conclusions in this expert consensus ocument reflect ACCF policy and do not necessarily represent the iews of the Uniformed Services University of the Health Sciences, the .
Patent
Magnetic resonance imaging apparatus and magnetic resonance imaging method
TL;DR: In this paper, a spatial selective excitation pulse is applied to a region including at least a part of an ascending aorta for distinguishably displaying inflowing blood flowing into the imaging region.
References
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PatentDOI
Simultaneous acquisition of spatial harmonics (SMASH): ultra-fast imaging with radiofrequency coil arrays
TL;DR: SiMultaneous Acquisition of Spatial Harmonics (SMASH) as mentioned in this paper is a partially parallel imaging strategy, which is readily integrated with many existing fast imaging sequences, yielding multiplicative time savings without a significant sacrifice in spatial resolution or signal-to-noise ratio.
Book
An introduction to continuum mechanics
Morton E. Gurtin,W. J. Drugan +1 more
TL;DR: In this paper, the NavierStokes Equations are used to define linear elasticity for tensor analysis, and the invariance of material response is established. But the analysis is restricted to finite elasticity and cannot be extended to infinite elasticity.
Journal ArticleDOI
Human heart: tagging with MR imaging--a method for noninvasive assessment of myocardial motion.
TL;DR: Specified regions of the myocardium can be labeled in magnetic resonance (MR) imaging to serve as markers during contraction, thus permitting sampling of the entire contractile phase of the cardiac cycle.
Journal ArticleDOI
MR imaging of motion with spatial modulation of magnetization.
Leon Axel,Lawrence Dougherty +1 more
TL;DR: This technique can be used to study heart wall motion, to distinguish slowly moving blood from thrombus, and to study the flow of blood and cerebrospinal fluid.
Journal ArticleDOI
Improved myocardial tagging contrast
TL;DR: An improved method, called Complementary SPAtial Modulation of Magnetization (CSPAMM), which separates the component of the magnetization with the tagging information from the relaxed component by subtraction of two measurements with first a positive and then a negative tagging grid, greatly facilitates the automatic evaluation of the myocardial motion.