Reconstruction of dynamic contrast enhanced magnetic resonance imaging of the breast with temporal constraints

Liyong Chen, Matthias C. Schabel, Edward V.R. DiBella

Research output: Contribution to journalArticle

50 Scopus citations

Abstract

A number of methods using temporal and spatial constraints have been proposed for reconstruction of undersampled dynamic magnetic resonance imaging (MRI) data. The complex data can be constrained or regularized in a number of different ways, for example, the time derivative of the magnitude and phase image voxels can be constrained separately or jointly. Intuitively, the performance of different regularizations will depend on both the data and the chosen temporal constraints. Here, a complex temporal total variation (TV) constraint was compared to the use of separate real and imaginary constraints, and to a magnitude constraint alone. Projection onto Convex Sets (POCS) with a gradient descent method was used to implement the diverse temporal constraints in reconstructions of DCE MRI data. For breast DCE data, serial POCS with separate real and imaginary TV constraints was found to give relatively poor results while serial/parallel POCS with a complex temporal TV constraint and serial POCS with a magnitude-only temporal TV constraint performed well with an acceleration factor as large as R=6. In the tumor area, the best method was found to be parallel POCS with complex temporal TV constraint. This method resulted in estimates for the pharmacokinetic parameters that were linearly correlated to those estimated from the fully-sampled data, with Ktrans,R=6=0.97 Ktrans,R=1+0.00 with correlation coefficient r=0.98, kep,R=6=0.95 kep,R=1+0.00 (r=0.85). These results suggest that it is possible to acquire highly undersampled breast DCE-MRI data with improved spatial and/or temporal resolution with minimal loss of image quality.

Original languageEnglish (US)
Pages (from-to)637-645
Number of pages9
JournalMagnetic Resonance Imaging
Volume28
Issue number5
DOIs
StatePublished - Jun 2010

Keywords

  • Breast cancer
  • Compressed sensing
  • Constrained reconstruction
  • Dynamic contrast enhanced MRI
  • POCS
  • Total variation

ASJC Scopus subject areas

  • Biophysics
  • Biomedical Engineering
  • Radiology Nuclear Medicine and imaging

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