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3D+time Left Ventricular Strain by Unwrapping Harmonic Phase with Graph Cuts

  • Ming Li
  • Himanshu Gupta
  • Steven G. Lloyd
  • Louis J. Dell’Italia
  • Thomas S. DenneyJr.
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8674)

Abstract

In previous work, a three-dimensional left ventricular strain throughout the cardiac cycle was reconstructed using a prolate spheroidal B-spline (PSB) method with displacement measurements obtained from unwrapped tagged MRI (tMRI) harmonic phase images. Manually placed branch cuts were required for each harmonic phase image to resolve phase inconsistencies and to guide the phase unwrapping (mSUP), which is both labor intensive and time consuming and therefore not proper for clinic application. In this paper, we present an automated graph cuts based phase unwrapping method for myocardium displacement measurement (caSUP) which can be used to compute 3D+time cardiac strain. A set of 8 human studies were used to optimize parameters of the energy function and another set of 32 human studies were used to validate the proposed method by comparing resulted strains with those from mSUP and a feature-based (FB) method using the same PSB strain reconstruction. The automated caSUP strains were close to the manual strains and only required 6 minutes after myocardium segmentation versus ~2 hours for the manual method.

Keywords

Mitral Regurgitation Unwrap Phase Integer Optimization Binary Optimization Harmonic Phase 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Ming Li
    • 1
  • Himanshu Gupta
    • 2
  • Steven G. Lloyd
    • 2
  • Louis J. Dell’Italia
    • 2
  • Thomas S. DenneyJr.
    • 1
  1. 1.Auburn University MRI Research CenterAuburnUSA
  2. 2.Division of Cardiovascular DiseaseUniversity of Alabama at BirminghamBirminghamUSA

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