Compressed sensing MRI reconstruction from 3D multichannel data using GPUs

Ching Hua Chang, Xiangdong Yu, Jim X. Ji

Research output: Contribution to journalArticle

11 Citations (Scopus)


Purpose: To accelerate iterative reconstructions of compressed sensing (CS) MRI from 3D multichannel data using graphics processing units (GPUs). Methods: The sparsity of MRI signals and parallel array receivers can reduce the data acquisition requirements. However, iterative CS reconstructions from data acquired using an array system may take a significantly long time, especially for a large number of parallel channels. This paper presents an efficient method for CS-MRI reconstruction from 3D multichannel data using GPUs. In this method, CS reconstructions were simultaneously processed in a channel-by-channel fashion on the GPU, in which the computations of multiple-channel 3D-CS reconstructions are highly parallelized. The final image was then produced by a sum-of-squares method on the central processing unit. Implementation details including algorithm, data/memory management, and parallelization schemes are reported in the paper. Results: Both simulated data and in vivo MRI array data were tested. The results showed that the proposed method can significantly improve the image reconstruction efficiency, typically shortening the runtime by a factor of 30. Conclusions: Using low-cost GPUs and an efficient algorithm allowed the 3D multislice compressive-sensing reconstruction to be performed in less than 1 s. The rapid reconstructions are expected to help bring high-dimensional, multichannel parallel CS MRI closer to clinical applications. Magn Reson Med 78:2265–2274, 2017.

Original languageEnglish
Pages (from-to)2265-2274
Number of pages10
JournalMagnetic Resonance in Medicine
Issue number6
Publication statusPublished - Dec 2017



  • compressed sensing
  • graphics processing unit
  • image reconstruction
  • parallel computing
  • parallel imaging

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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