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High-resolution, real-time exercise stress cine

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In this work, we combine a recently proposed method for variable density incoherent spatiotemporal sampling, called VISTA, and SPIRiT-based reconstruction with 3D spatiotemporal regularization to reconstruct real-time stress cine images... All data were reconstructed offline in MATLAB (version 2013b) using an Intel Core i5 workstation with 24 GB memory... Signal to noise ratio (SNR)--defined as the inverse of the standard deviation of pixel intensities over peripheral regions devoid of NMR signal--was also measured... Figure 1 shows example images at acceleration rates of 4 and 10 using the traditional UIS sampling and GRAPPA reconstruction (UIS+GRAPPA) and the incoherent VISTA sampling and l1-regularized SPIRiT (VISTA+SPIRiT)... Compared to the traditional UIS+GRAPPA approach, VISTA+SPIRiT results showed 3 to 5-fold improvement in SNR... Visually, VISTA+SPIRiT also shows minimum artifacts compared to UIS+GRAPPA, especially at high acceleration rates... For VISTA+SPIRiT, the reconstruction time for one dataset was under 30 minutes... Combination of VISTA and SPIRiT with spatiotemporal l1-regularization allows high quality images at sub 35-ms temporal resolution and sub 2.5-mm spatial resolution under conditions of high heart rates and exaggerated breathing motion following exercise stress.

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Real-time, free-breathing cine images under rest and stress conditions. The proposed VISTA+SPIRiT is compared against traditional GRAPPA reconstruction; the results at two different acceleration rates are displayed.
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Figure 1: Real-time, free-breathing cine images under rest and stress conditions. The proposed VISTA+SPIRiT is compared against traditional GRAPPA reconstruction; the results at two different acceleration rates are displayed.

Mentions: Figure 1 shows example images at acceleration rates of 4 and 10 using the traditional UIS sampling and GRAPPA reconstruction (UIS+GRAPPA) and the incoherent VISTA sampling and l1-regularized SPIRiT (VISTA+SPIRiT). Compared to the traditional UIS+GRAPPA approach, VISTA+SPIRiT results showed 3 to 5-fold improvement in SNR. Visually, VISTA+SPIRiT also shows minimum artifacts compared to UIS+GRAPPA, especially at high acceleration rates. For VISTA+SPIRiT, the reconstruction time for one dataset was under 30 minutes.


High-resolution, real-time exercise stress cine
Real-time, free-breathing cine images under rest and stress conditions. The proposed VISTA+SPIRiT is compared against traditional GRAPPA reconstruction; the results at two different acceleration rates are displayed.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4043748&req=5

Figure 1: Real-time, free-breathing cine images under rest and stress conditions. The proposed VISTA+SPIRiT is compared against traditional GRAPPA reconstruction; the results at two different acceleration rates are displayed.
Mentions: Figure 1 shows example images at acceleration rates of 4 and 10 using the traditional UIS sampling and GRAPPA reconstruction (UIS+GRAPPA) and the incoherent VISTA sampling and l1-regularized SPIRiT (VISTA+SPIRiT). Compared to the traditional UIS+GRAPPA approach, VISTA+SPIRiT results showed 3 to 5-fold improvement in SNR. Visually, VISTA+SPIRiT also shows minimum artifacts compared to UIS+GRAPPA, especially at high acceleration rates. For VISTA+SPIRiT, the reconstruction time for one dataset was under 30 minutes.

View Article: PubMed Central - HTML

AUTOMATICALLY GENERATED EXCERPT
Please rate it.

In this work, we combine a recently proposed method for variable density incoherent spatiotemporal sampling, called VISTA, and SPIRiT-based reconstruction with 3D spatiotemporal regularization to reconstruct real-time stress cine images... All data were reconstructed offline in MATLAB (version 2013b) using an Intel Core i5 workstation with 24 GB memory... Signal to noise ratio (SNR)--defined as the inverse of the standard deviation of pixel intensities over peripheral regions devoid of NMR signal--was also measured... Figure 1 shows example images at acceleration rates of 4 and 10 using the traditional UIS sampling and GRAPPA reconstruction (UIS+GRAPPA) and the incoherent VISTA sampling and l1-regularized SPIRiT (VISTA+SPIRiT)... Compared to the traditional UIS+GRAPPA approach, VISTA+SPIRiT results showed 3 to 5-fold improvement in SNR... Visually, VISTA+SPIRiT also shows minimum artifacts compared to UIS+GRAPPA, especially at high acceleration rates... For VISTA+SPIRiT, the reconstruction time for one dataset was under 30 minutes... Combination of VISTA and SPIRiT with spatiotemporal l1-regularization allows high quality images at sub 35-ms temporal resolution and sub 2.5-mm spatial resolution under conditions of high heart rates and exaggerated breathing motion following exercise stress.

No MeSH data available.


Related in: MedlinePlus