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Generalized simultaneous multi-orientation 2D imaging.

Nikolai J Mickevicius1, Andrew S Nencka2, Eric S Paulson1,2

  • 1Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, WI, USA.

Magnetic Resonance in Medicine
|December 25, 2019
PubMed
Summary
This summary is machine-generated.

This study introduces a new framework for simultaneous multi-orientation (SMO) imaging, improving MR-guided therapy motion monitoring. The method enables faster imaging with more slices, enhancing temporal resolution for better real-time tracking.

Keywords:
MR-guided radiation therapySMOSMSobliquesimultaneous multi-orientationsimultaneous multislice

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Area of Science:

  • Magnetic Resonance Imaging
  • Medical Physics
  • Image Acquisition

Background:

  • Precise motion monitoring during MR-guided therapies requires flexible slice prescription.
  • Increasing slice count for spatial coverage in 2D cine imaging often compromises temporal resolution.

Purpose of the Study:

  • To describe a novel framework for simultaneous acquisition of multiple, arbitrarily oriented MRI slices.
  • To enable higher frame rates for improved motion monitoring in MR-guided therapies.

Main Methods:

  • Developed a framework to calculate zeroth gradient moments for sequentially excited slices with multiple orientations.
  • Acquired data in phantom and in vivo (head/neck, abdomen) using the proposed method.
  • Implemented in-plane acceleration for rapid imaging of moving objects.

Main Results:

  • Successfully obtained arbitrarily rotated, simultaneous multi-orientation (SMO) images in phantom and in vivo.
  • Demonstrated the capability for rapid imaging of physiological motion using SMO with acceleration.

Conclusions:

  • The generalized SMO imaging framework is technically feasible.
  • This approach shows significant promise for advancing motion monitoring in MR-guided therapies.