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Related Experiment Video

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GOCART: GOlden-angle CArtesian randomized time-resolved 3D MRI.

Yinghua Zhu1, Yi Guo1, Sajan Goud Lingala1

  • 1Ming Hsieh Department of Electrical Engineering, Viterbi School of Engineering, University of Southern California, Los Angeles, USA.

Magnetic Resonance Imaging
|December 29, 2015
PubMed
Summary
This summary is machine-generated.

A new 3D MRI sampling method, GOlden-angle CArtesian Randomized Time-resolved (GOCART), enhances dynamic contrast-enhanced (DCE) MRI. This efficient technique improves image quality and accelerates scans using parallel imaging and compressed sensing.

Keywords:
DCEDynamic golden angleRandomized samplingConstrained reconstructionTime resolved 3D MRI

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Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Medical Imaging Technology
  • Image Reconstruction

Background:

  • Time-resolved 3D MRI is crucial for dynamic processes.
  • Accelerated imaging techniques are needed to improve efficiency.
  • Current sampling schemes have limitations in speed and quality.

Purpose of the Study:

  • To develop and evaluate a novel 3D Cartesian sampling scheme for time-resolved 3D MRI.
  • To assess the suitability of the scheme for parallel imaging and compressed sensing.
  • To improve the efficiency and quality of dynamic contrast-enhanced (DCE) MRI.

Main Methods:

  • A novel sampling scheme, GOlden-angle CArtesian Randomized Time-resolved (GOCART) 3D MRI, was developed.
  • GOCART utilizes golden angle (GA) Cartesian sampling with randomized phase encode locations.
  • The method was evaluated using retrospective and prospective undersampled in-vivo DCE-MRI and simulated phantom data with constrained reconstruction.

Main Results:

  • GOCART-reconstructed images were equal to or superior to Poisson disc and GA sampling schemes.
  • GOCART sampling tables were generated rapidly (<100ms).
  • Prospective GOCART imaging successfully produced clinically valuable whole-brain DCE-MRI.

Conclusions:

  • GOCART is a practical and efficient sampling scheme for time-resolved 3D MRI.
  • The method demonstrates significant potential for accelerating DCE-MRI.
  • GOCART is well-suited for modern reconstruction techniques like parallel imaging and compressed sensing.