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POCS-based reconstruction of multiplexed sensitivity encoded MRI (POCSMUSE): A general algorithm for reducing motion-related artifacts.

Publication ,  Journal Article
Chu, M-L; Chang, H-C; Chung, H-W; Truong, T-K; Bashir, MR; Chen, N-K
Published in: Magn Reson Med
November 2015

PURPOSE: A projection onto convex sets reconstruction of multiplexed sensitivity encoded MRI (POCSMUSE) is developed to reduce motion-related artifacts, including respiration artifacts in abdominal imaging and aliasing artifacts in interleaved diffusion-weighted imaging. THEORY: Images with reduced artifacts are reconstructed with an iterative projection onto convex sets (POCS) procedure that uses the coil sensitivity profile as a constraint. This method can be applied to data obtained with different pulse sequences and k-space trajectories. In addition, various constraints can be incorporated to stabilize the reconstruction of ill-conditioned matrices. METHODS: The POCSMUSE technique was applied to abdominal fast spin-echo imaging data, and its effectiveness in respiratory-triggered scans was evaluated. The POCSMUSE method was also applied to reduce aliasing artifacts due to shot-to-shot phase variations in interleaved diffusion-weighted imaging data corresponding to different k-space trajectories and matrix condition numbers. RESULTS: Experimental results show that the POCSMUSE technique can effectively reduce motion-related artifacts in data obtained with different pulse sequences, k-space trajectories and contrasts. CONCLUSION: POCSMUSE is a general post-processing algorithm for reduction of motion-related artifacts. It is compatible with different pulse sequences, and can also be used to further reduce residual artifacts in data produced by existing motion artifact reduction methods.

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Published In

Magn Reson Med

DOI

EISSN

1522-2594

Publication Date

November 2015

Volume

74

Issue

5

Start / End Page

1336 / 1348

Location

United States

Related Subject Headings

  • Respiration
  • Nuclear Medicine & Medical Imaging
  • Movement
  • Image Processing, Computer-Assisted
  • Humans
  • Diffusion Magnetic Resonance Imaging
  • Algorithms
  • Abdomen
  • 4003 Biomedical engineering
  • 0903 Biomedical Engineering
 

Citation

APA
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ICMJE
MLA
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Chu, M.-L., Chang, H.-C., Chung, H.-W., Truong, T.-K., Bashir, M. R., & Chen, N.-K. (2015). POCS-based reconstruction of multiplexed sensitivity encoded MRI (POCSMUSE): A general algorithm for reducing motion-related artifacts. Magn Reson Med, 74(5), 1336–1348. https://doi.org/10.1002/mrm.25527
Chu, Mei-Lan, Hing-Chiu Chang, Hsiao-Wen Chung, Trong-Kha Truong, Mustafa R. Bashir, and Nan-kuei Chen. “POCS-based reconstruction of multiplexed sensitivity encoded MRI (POCSMUSE): A general algorithm for reducing motion-related artifacts.Magn Reson Med 74, no. 5 (November 2015): 1336–48. https://doi.org/10.1002/mrm.25527.
Chu M-L, Chang H-C, Chung H-W, Truong T-K, Bashir MR, Chen N-K. POCS-based reconstruction of multiplexed sensitivity encoded MRI (POCSMUSE): A general algorithm for reducing motion-related artifacts. Magn Reson Med. 2015 Nov;74(5):1336–48.
Chu, Mei-Lan, et al. “POCS-based reconstruction of multiplexed sensitivity encoded MRI (POCSMUSE): A general algorithm for reducing motion-related artifacts.Magn Reson Med, vol. 74, no. 5, Nov. 2015, pp. 1336–48. Pubmed, doi:10.1002/mrm.25527.
Chu M-L, Chang H-C, Chung H-W, Truong T-K, Bashir MR, Chen N-K. POCS-based reconstruction of multiplexed sensitivity encoded MRI (POCSMUSE): A general algorithm for reducing motion-related artifacts. Magn Reson Med. 2015 Nov;74(5):1336–1348.
Journal cover image

Published In

Magn Reson Med

DOI

EISSN

1522-2594

Publication Date

November 2015

Volume

74

Issue

5

Start / End Page

1336 / 1348

Location

United States

Related Subject Headings

  • Respiration
  • Nuclear Medicine & Medical Imaging
  • Movement
  • Image Processing, Computer-Assisted
  • Humans
  • Diffusion Magnetic Resonance Imaging
  • Algorithms
  • Abdomen
  • 4003 Biomedical engineering
  • 0903 Biomedical Engineering