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Related Concept Videos

Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...

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Accelerated multi-shot diffusion imaging.

Bruno Madore1, Jr-yuan George Chiou, Renxin Chu

  • 1Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.

Magnetic Resonance in Medicine
|September 6, 2013
PubMed
Summary
This summary is machine-generated.

This study introduces an accelerated diffusion imaging method to reduce MR image distortion. The technique effectively corrects motion and improves image quality at high acceleration factors.

Keywords:
accelerated imagingdiffusion imagingmulti-shot EPInavigator echoes

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Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Diffusion Tensor Imaging (DTI)

Background:

  • MR diffusion imaging is prone to artifacts like image distortion.
  • Accelerated imaging techniques aim to improve efficiency and reduce scan times.
  • Existing methods often struggle to balance acceleration with image quality.

Purpose of the Study:

  • To develop an accelerated multi-shot method for reducing image distortion in MR diffusion imaging.
  • To enhance image quality by leveraging sparsity in the kb-kd space and navigator data.

Main Methods:

  • The method utilizes the sparsity of diffusion-encoded data in kb-kd space to displace aliasing artifacts.
  • Navigator image phase is used for motion correction, and navigator signal magnitude in kb-kd space for regularization.
  • The approach reduces the number of ky lines per diffusion-encoded image, not the total number of images.

Main Results:

  • Demonstrated effectiveness in reducing image distortion, particularly at higher acceleration factors.
  • Achieved good image quality in volunteer studies with acceleration factors from 4 to 8.
  • Results were obtained both with and without the integration of parallel imaging techniques.

Conclusions:

  • An accelerated, motion-corrected diffusion imaging method has been successfully developed.
  • The method provides good image quality even at high acceleration factors.
  • This technique shows promise for improving the diagnostic utility of diffusion MRI.