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Abstract #1057

Reduction of Acquisition time by Partition of the sIgnal Decay in Spectroscopic Imaging (RAPID-SI) technique: Preliminary In-vivo results and comparison with CSI.

Sourav Bhaduri1, Patricia Clement1, Eric Achten1, and Hacene Serrai1,2

1Department of Radiology and nuclear medicine, University of Ghent, Gent, Belgium, 2Robarts Research Institute, University of Western Ontario, London, ON, Canada

We describe the development of the RAPID-SI technique and its implementation on a 3 T Siemens scanner. In-vivo studies demonstrate the performance of this technique in terms of acquisition time, signal-to-noise ratio, and data analysis. The results are compared to the CSI technique. Compared to CSI, RAPID reduces the acquisition time by a factor of R and provides accurate quantification results. The SNR of RAPID at the acquisition level is lower by √R and increased by data pre-processing. Quantification results of RAPID-SI are comparable to the CSI ones. The study shows that RAPID-SI provides accurate metabolite quantification results while significantly reducing acquisition time in obtaining MRSI data similar to CSI in terms of resolution and sensitivity.

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