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Researchers' Work from Massachusetts Institute of Technology Focuses on Magnetic Resonance Imaging (Interslice Leakage Artifact Reduction Technique...

July 25, 2014

Researchers' Work from Massachusetts Institute of Technology Focuses on Magnetic Resonance Imaging (Interslice Leakage Artifact Reduction Technique for Simultaneous Multislice Acquisitions)

By a News Reporter-Staff News Editor at Health & Medicine Week -- New research on Medical Imaging is the subject of a report. According to news originating from Cambridge, Massachusetts, by NewsRx correspondents, research stated, "Controlled aliasing techniques for simultaneously acquired echo-planar imaging slices have been shown to significantly increase the temporal efficiency for both diffusion-weighted imaging and functional magnetic resonance imaging studies. The 'slice-GRAPPA' (SG) method has been widely used to reconstruct such data."

Our news journalists obtained a quote from the research from the Massachusetts Institute of Technology, "We investigate robust optimization techniques for SG to ensure image reconstruction accuracy through a reduction of leakage artifacts. Split SG is proposed as an alternative kernel optimization method. The performance of Split SG is compared to standard SG using data collected on a spherical phantom and in vivo on two subjects at 3 T. Slice-accelerated and nonaccelerated data were collected for a spin-echo diffusion-weighted acquisition. Signal leakage metrics and time-series SNR were used to quantify the performance of the kernel fitting approaches. The Split SG optimization strategy significantly reduces leakage artifacts for both phantom and in vivo acquisitions. In addition, a significant boost in time-series SNR for in vivo diffusion-weighted acquisitions with in-plane 2x and slice 3x accelerations was observed with the Split SG approach. By minimizing the influence of leakage artifacts during the training of SG kernels, we have significantly improved reconstruction accuracy."

According to the news editors, the research concluded: "Our robust kernel fitting strategy should enable better reconstruction accuracy and higher slice-acceleration across many applications."

For more information on this research see: Interslice Leakage Artifact Reduction Technique for Simultaneous Multislice Acquisitions. Magnetic Resonance in Medicine, 2014;72(1):93-102. Magnetic Resonance in Medicine can be contacted at: Wiley-Blackwell, 111 River St, Hoboken 07030-5774, NJ, USA. (Wiley-Blackwell -; Magnetic Resonance in Medicine -

The news correspondents report that additional information may be obtained from S.F. Cauley, MIT, Harvard MIT Div Hlth Sci & Technol, Cambridge, MA 02139, United States. Additional authors for this research include J.R. Polimeni, H. Bhat, L.L. Wald and K. Setsompop (see also Medical Imaging).

Keywords for this news article include: Cambridge, Massachusetts, United States, Medical Imaging, North and Central America

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Source: Health & Medicine Week

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