Biomaterial Database

Model-free reconstruction of three-dimensional myocardial strain from planar tagged MR images. 1997

T S Denney, and E R McVeigh

Electrical Engineering Department, Auburn University, AL 36849-5201, USA.

A technique is presented for reconstructing a three-dimensional myocardial strain map from a set of parallel-tagged MR images. Radial strains were reconstructed from in vivo data from an anesthetized dog with values between .05 and .1 with a precision of +/- .003 for a tag detection accuracy of .1 mm and a tag spacing of 2.5 mm. The reconstruction spatial resolution was demonstrated by reconstructing a localized displacement abnormality. In the circumferential direction, the abnormality that resulted in 50% displacement attenuation had a full width at half maximum of 5.4 +/- .4 mm (mean +/- SD). Graphs are presented showing the relationship between the size of an abnormality and the ability of the method to reconstruct that abnormality. The combination of high resolution parallel-tagged MR images and the model-free, coordinate system-free strain reconstruction technique presented in this paper is capable of producing accurate, high resolution strain maps of the myocardium.

UI	MeSH Term	Description	Entries
D007089	Image Enhancement	Improvement of the quality of a picture by various techniques, including computer processing, digital filtering, echocardiographic techniques, light and ultrastructural MICROSCOPY, fluorescence spectrometry and microscopy, scintigraphy, and in vitro image processing at the molecular level.	Image Quality Enhancement,Enhancement, Image,Enhancement, Image Quality,Enhancements, Image,Enhancements, Image Quality,Image Enhancements,Image Quality Enhancements,Quality Enhancement, Image,Quality Enhancements, Image
D009010	Monte Carlo Method	In statistics, a technique for numerically approximating the solution of a mathematical problem by studying the distribution of some random variable, often generated by a computer. The name alludes to the randomness characteristic of the games of chance played at the gambling casinos in Monte Carlo. (From Random House Unabridged Dictionary, 2d ed, 1993)	Method, Monte Carlo
D004285	Dogs	The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065)	Canis familiaris,Dog
D006321	Heart	The hollow, muscular organ that maintains the circulation of the blood.	Hearts
D000465	Algorithms	A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.	Algorithm
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D012680	Sensitivity and Specificity	Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)	Specificity,Sensitivity,Specificity and Sensitivity
D013314	Stress, Mechanical	A purely physical condition which exists within any material because of strain or deformation by external forces or by non-uniform thermal expansion; expressed quantitatively in units of force per unit area.	Mechanical Stress,Mechanical Stresses,Stresses, Mechanical
D017352	Echo-Planar Imaging	A type of MAGNETIC RESONANCE IMAGING that uses only one nuclear spin excitation per image and therefore can obtain images in a fraction of a second rather than the minutes required in traditional MRI techniques. It is used in a variety of medical and scientific applications.	MR Tomography, Echo-Planar,Magnetic Resonance Imaging, Echo-Planar,Echo-Planar MR Tomography,Echo-Planar Magnetic Resonance Imaging,Echoplanar Imaging,Echoplanar MR Tomography,Echoplanar Magnetic Resonance Imaging,MR Tomography, Echoplanar,Magnetic Resonance Imaging, Echoplanar,Echo Planar Imaging,Echo Planar MR Tomography,Echo Planar Magnetic Resonance Imaging,Echo-Planar Imagings,Echo-Planar MR Tomographies,Echoplanar Imagings,Echoplanar MR Tomographies,Imaging, Echo-Planar,Imaging, Echoplanar,Imagings, Echo-Planar,Imagings, Echoplanar,MR Tomographies, Echo-Planar,MR Tomographies, Echoplanar,MR Tomography, Echo Planar,Magnetic Resonance Imaging, Echo Planar,Tomographies, Echo-Planar MR,Tomographies, Echoplanar MR,Tomography, Echo-Planar MR,Tomography, Echoplanar MR