Pocs-enhanced correction of motion artifacts in parallel MRI

Alexey A. Samsonov, Julia Velikina, Youngkyoo Jung, Eugene G. Kholmovski, Chris R. Johnson, Walter F. Block

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A new method for correction of MRI motion artifacts induced by corrupted k-space data, acquired by multiple receiver coils such as phased arrays, is presented. In our approach, a projections onto convex sets (POCS)-based method for reconstruction of sensitivity encoded MRI data (POCSENSE) is employed to identify corrupted k-space samples. After the erroneous data are discarded from the dataset, the artifact-free images are restored from the remaining data using coil sensitivity profiles. The error detection and data restoration are based on informational redundancy of phased-array data and may be applied to full and reduced datasets. An important advantage of the new POCS-based method is that, in addition to multicoil data redundancy, it can use a priori known properties about the imaged object for improved MR image artifact correction. The use of such information was shown to improve significantly k-space error detection and image artifact correction. The method was validated on data corrupted by simulated and real motion such as head motion and pulsatile flow. Magn Reson Med 63:1104-1110, 2010.

Original languageEnglish (US)
Pages (from-to)1104-1110
Number of pages7
JournalMagnetic Resonance in Medicine
Volume63
Issue number4
DOIs
StatePublished - May 1 2010
Externally publishedYes

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Artifacts
Pulsatile Flow
Head
Datasets

Keywords

  • Constrained reconstruction
  • Motion artifact
  • Parallel MRI
  • POCS
  • POCSENSE

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

Samsonov, A. A., Velikina, J., Jung, Y., Kholmovski, E. G., Johnson, C. R., & Block, W. F. (2010). Pocs-enhanced correction of motion artifacts in parallel MRI. Magnetic Resonance in Medicine, 63(4), 1104-1110. https://doi.org/10.1002/mrm.22254

Pocs-enhanced correction of motion artifacts in parallel MRI. / Samsonov, Alexey A.; Velikina, Julia; Jung, Youngkyoo; Kholmovski, Eugene G.; Johnson, Chris R.; Block, Walter F.

In: Magnetic Resonance in Medicine, Vol. 63, No. 4, 01.05.2010, p. 1104-1110.

Research output: Contribution to journalArticle

Samsonov, AA, Velikina, J, Jung, Y, Kholmovski, EG, Johnson, CR & Block, WF 2010, 'Pocs-enhanced correction of motion artifacts in parallel MRI', Magnetic Resonance in Medicine, vol. 63, no. 4, pp. 1104-1110. https://doi.org/10.1002/mrm.22254
Samsonov AA, Velikina J, Jung Y, Kholmovski EG, Johnson CR, Block WF. Pocs-enhanced correction of motion artifacts in parallel MRI. Magnetic Resonance in Medicine. 2010 May 1;63(4):1104-1110. https://doi.org/10.1002/mrm.22254
Samsonov, Alexey A. ; Velikina, Julia ; Jung, Youngkyoo ; Kholmovski, Eugene G. ; Johnson, Chris R. ; Block, Walter F. / Pocs-enhanced correction of motion artifacts in parallel MRI. In: Magnetic Resonance in Medicine. 2010 ; Vol. 63, No. 4. pp. 1104-1110.
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