Image reconstruction from highly under sampled (k, t)-space data with joint partial separability and sparsity constraints

Bo Zhao, Justin P. Haldar, Anthony G. Christodoulou, Zhi Pei Liang

Research output: Contribution to journalArticlepeer-review

Abstract

Partial separability (PS) and sparsity have been previously used to enable reconstruction of dynamic images from undersampled (k, t)-space data. This paper presents a new method to use PS and sparsity constraints jointly for enhanced performance in this context. The proposedmethod combines the complementary advantages of PS and sparsity constraints using a unified formulation, achieving significantly better reconstruction performance than using either of these constraints individually. A globally convergent computational algorithm is described to efficiently solve the underlying optimization problem. Reconstruction results from simulated and in vivo cardiacMRI data are also shown to illustrate the performance of the proposed method.

Original languageEnglish (US)
Article number6214613
Pages (from-to)1809-1820
Number of pages12
JournalIEEE transactions on medical imaging
Volume31
Issue number9
DOIs
StatePublished - 2012

Keywords

  • Constrained reconstruction
  • Dynamic imaging
  • Low-rank matrices
  • Partial separability modeling
  • Real-time cardiac magnetic resonance imaging (MRI)
  • Sparsity

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Radiological and Ultrasound Technology
  • Software

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