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	Author	Jaume Garcia; Joel Barajas; Francesc Carreras; Sandra Pujades; Petia Radeva
	Title	An intuitive validation technique to compare local versus global tagged MRI analysis			Type	Conference Article
	Year	2005	Publication	Computers In Cardiology	Abbreviated Journal
	Volume	32	Issue		Pages	29–32
	Keywords
	Abstract	Myocardium appears as a uniform tissue that seen in convectional Magnetic Resonance Images (MRI) shows just the contractile part of its movement. MR Tagging is a unique imaging technique that prints a grid over the tissue which moves according to the underlying movement of the myocardium revealing the true deformation of the cardiac muscle. Optical flow techniques based on spectral information estimate tissue displacement by analyzing information encoded in the phase maps which can be obtained using, local (Gabor) and global (HARP) methods. In this paper we compare both in synthetic and real Tagged MR sequences. We conclude that local method is slightly more accurate than the global one. On the other hand, global method is more efficient as it is much faster and less parameters have to be taken into account
	Address	Lyon (France)
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN	0-7803-9337-6	Medium
	Area		Expedition		Conference
	Notes	IAM;MILAB			Approved	no
	Call Number	IAM @ iam @ GBC2005			Serial	639
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	Author	Joel Barajas; Jaume Garcia; Francesc Carreras; Sandra Pujades; Petia Radeva
	Title	Angle Images Using Gabor Filters in Cardiac Tagged MRI			Type	Conference Article
	Year	2005	Publication	Proceeding of the 2005 conference on Artificial Intelligence Research and Development	Abbreviated Journal
	Volume		Issue		Pages	107-114
	Keywords	Angle Images, Gabor Filters, Harp, Tagged Mri
	Abstract	Tagged Magnetic Resonance Imaging (MRI) is a non-invasive technique used to examine cardiac deformation in vivo. An Angle Image is a representation of a Tagged MRI which recovers the relative position of the tissue respect to the distorted tags. Thus cardiac deformation can be estimated. This paper describes a new approach to generate Angle Images using a bank of Gabor filters in short axis cardiac Tagged MRI. Our method improves the Angle Images obtained by global techniques, like HARP, with a local frequency analysis. We propose to use the phase response of a combination of a Gabor filters bank, and use it to find a more precise deformation of the left ventricle. We demonstrate the accuracy of our method over HARP by several experimental results.
	Address	Amsterdam; The Netherlands
	Corporate Author				Thesis
	Publisher	IOS Press	Place of Publication	Amsterdam, The Netherlands	Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN	1-58603-560-6	Medium
	Area		Expedition		Conference	CAIRD
	Notes	IAM;MILAB			Approved	no
	Call Number	BCNPCL @ bcnpcl @ BGC2005; IAM @ iam			Serial	595
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