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• W2000516034 abstract "Abstract This work aims at improving the performance of parallel imaging by using it with our “unaliasing by Fourier‐encoding the overlaps in the temporal dimension” (UNFOLD) temporal strategy. A self‐calibration method called “self, hybrid referencing with UNFOLD and GRAPPA” (SHRUG) is presented. SHRUG combines the UNFOLD‐based sensitivity mapping strategy introduced in the TSENSE method by Kellman et al. ( 5 ), with the strategy introduced in the GRAPPA method by Griswold et al. ( 10 ). SHRUG merges the two approaches to alleviate their respective limitations, and provides fast self‐calibration at any given acceleration factor. UNFOLD‐SENSE further includes an UNFOLD artifact suppression scheme to significantly suppress artifacts and amplified noise produced by parallel imaging. This suppression scheme, which was published previously ( 4 ), is related to another method that was presented independently as part of TSENSE. While the two are equivalent at accelerations ≤ 2.0, the present approach is shown here to be significantly superior at accelerations > 2.0, with up to double the artifact suppression at high accelerations. Furthermore, a slight modification of Cartesian SENSE is introduced, which allows departures from purely Cartesian sampling grids. This technique, termed variable‐density SENSE (vdSENSE), allows the variable‐density data required by SHRUG to be reconstructed with the simplicity and fast processing of Cartesian SENSE. UNFOLD‐SENSE is given by the combination of SHRUG for sensitivity mapping, vdSENSE for reconstruction, and UNFOLD for artifact/amplified noise suppression. The method was implemented, with online reconstruction, on both an SSFP and a myocardium‐perfusion sequence. The results from six patients scanned with UNFOLD‐SENSE are presented. Magn Reson Med 52:310–320, 2004. © 2004 Wiley‐Liss, Inc." @default.
• W2000516034 created "2016-06-24" @default.
• W2000516034 creator A5043690832 @default.
• W2000516034 date "2004-07-23" @default.
• W2000516034 modified "2023-10-17" @default.
• W2000516034 title "UNFOLD-SENSE: A parallel MRI method with self-calibration and artifact suppression" @default.
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• W2000516034 doi "https://doi.org/10.1002/mrm.20133" @default.
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