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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
Permanent link to this record
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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