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An adaptive multi-frame parallel iterative method for accelerating real-time magnetic particle imaging

Yusong Shen1, Liwen Zhang2,3,4, Yaxin Shang5

  • 1School of Computer Science and Engineering, Southeast University, Nanjing, People's Republic of China.

Physics in Medicine and Biology
|October 27, 2023
PubMed
Summary

We developed a new parallel method for magnetic particle imaging (MPI) reconstruction, significantly speeding up image generation. This adaptive multi-frame parallel iterative method (AMPIM) achieves real-time MPI imaging with high frame rates and improved image quality.

Keywords:
magnetic particle imagingparallel computationparallel iterative methodreal-time reconstruction

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Area of Science:

  • Medical Imaging
  • Computational Imaging
  • Biophysics

Background:

  • Real-time magnetic particle imaging (MPI) is crucial for clinical applications.
  • Current serial iterative reconstruction methods introduce significant latency.
  • There is a need for faster reconstruction techniques to enable real-time MPI.

Purpose of the Study:

  • To develop a parallel method for accelerating real-time MPI reconstruction.
  • To reduce latency in MPI image reconstruction for clinical viability.
  • To improve the computational efficiency of MPI reconstruction algorithms.

Main Methods:

  • Proposed the adaptive multi-frame parallel iterative method (AMPIM) for parallel processing of multi-frame signals.
  • Implemented an acceleration strategy for parallel computation to enhance AMPIM's efficiency.
  • Evaluated AMPIM using the OpenMPIData dataset.

Main Results:

  • AMPIM improved the reconstruction frame rate per second by two orders of magnitude compared to prevalent iterative algorithms.
  • Achieved high contrast-to-noise ratio in reconstructed images.
  • Demonstrated reduction in image artifacts with the AMPIM approach.

Conclusions:

  • AMPIM effectively optimizes least squares problems with multiple right-hand sides through parallelization.
  • The method shows significant potential for high-frame-rate, real-time MPI imaging.
  • AMPIM offers a substantial advancement for clinical applications of MPI.