Abbas N Moghaddam

US Patent:

20080009704, Jan 10, 2008

Filed:

Jun 6, 2007

Appl. No.:

11/810806

Inventors:

Morteza Gharib - San Marino CA, US
Abbas Nasiraei Moghaddam - Pasadena CA, US

International Classification:

A61B 5/05

US Classification:

600410

Abstract:

The present invention relates to a system for obtaining strain corresponding to an object's deformation by radially-tagged magnetic resonance imaging (MRI). The system acquires at least a ring-shaped crown region of Fourier domain (k-space) data for at least two sequential images of a radially-tagged object at different phases of deformation of the radially-tagged object. A first image represents a primary state of the radially-tagged object and a second image represents a secondary state of the radially-tagged object. Additionally, the images include radial tag lines. The first and second images are reconstructed as a reconstructed primary-state image and a reconstructed secondary-state image. The images are reconstructed as weighted by circumferential density of the radial tag lines, such that they are “tag line density-weighted” reconstructed images. Circumferential strain of the radially-tagged object is determined by comparing the two images.