Home > Publications Database > Spiral 3DREAM sequence for fast whole‐brain B1 mapping > print

001     272879
005     20250127091550.0
024 7 _ |a pmid:39219171
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024 7 _ |a 10.1002/mrm.30282
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024 7 _ |a 1522-2594
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024 7 _ |a 0740-3194
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037 _ _ |a DZNE-2024-01295
082 _ _ |a 610
100 1 _ |a Niesen, Svenja
|0 P:(DE-2719)9001610
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245 _ _ |a Spiral 3DREAM sequence for fast whole‐brain B1 mapping
260 _ _ |a New York, NY [u.a.]
|c 2025
|b Wiley-Liss
336 7 _ |a article
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336 7 _ |a ARTICLE
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336 7 _ |a Journal Article
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520 _ _ |a This work demonstrates a new variant of the 3DREAM sequence for whole-brain B 1 + $$ {\mathrm{B}}_1^{+} $$ mapping employing a three-dimensional (3D) stack-of-spirals readout. The spiral readout reduces the echo train length after the STEAM preparation in order to overcome the significant blurring in STE* images due to the decreasing STE* signal with each excitation pulse.The 3DREAM sequence rapidly acquires two contrasts to calculate whole-brain flip angle maps. In the proposed spiral 3DREAM sequence, the Cartesian readout scheme is replaced by an accelerated 3D stack-of-spirals readout with a CAIPIRINHA sampling scheme. Phantom experiments were conducted to compare flip angle maps of the spiral 3DREAM sequence to a Cartesian 3DREAM sequence, an actual flip-angle-imaging (AFI) sequence, the dual-angle method, and the Bloch-Siegert shift method. Afterwards, the results were validated in vivo acquiring flip angle maps from five subjects.Flip angle maps of the spiral 3DREAM sequences showed high agreement with the reference methods both in phantom and in vivo experiments. Blurring in STE* images and flip angle maps was reduced compared to the Cartesian 3DREAM sequence.The spiral 3DREAM sequence utilizes a fast readout minimizing the echo train length of the imaging train. This reduces blurring in STE* images as well as the total acquisition time and increases the effective resolution of B 1 + $$ {\mathrm{B}}_1^{+} $$ maps.
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588 _ _ |a Dataset connected to CrossRef, Journals: pub.dzne.de
650 _ 2 |a Humans
|2 MeSH
650 _ 2 |a Imaging, Three-Dimensional: methods
|2 MeSH
650 _ 2 |a Brain: diagnostic imaging
|2 MeSH
650 _ 2 |a Phantoms, Imaging
|2 MeSH
650 _ 2 |a Algorithms
|2 MeSH
650 _ 2 |a Magnetic Resonance Imaging: methods
|2 MeSH
650 _ 2 |a Reproducibility of Results
|2 MeSH
650 _ 2 |a Brain Mapping: methods
|2 MeSH
650 _ 2 |a Image Interpretation, Computer-Assisted: methods
|2 MeSH
650 _ 2 |a Image Enhancement: methods
|2 MeSH
700 1 _ |a Veldmann, Marten
|0 P:(DE-2719)2814200
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700 1 _ |a Ehses, Philipp
|0 P:(DE-2719)2812222
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700 1 _ |a Stöcker, Tony
|0 P:(DE-2719)2810538
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|e Last author
773 _ _ |a 10.1002/mrm.30282
|g Vol. 93, no. 1, p. 321 - 329
|0 PERI:(DE-600)1493786-4
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|p 321 - 329
|t Magnetic resonance in medicine
|v 93
|y 2025
|x 1522-2594
856 4 _ |y OpenAccess
|u https://pub.dzne.de/record/272879/files/DZNE-2024-01295.pdf
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910 1 _ |a Deutsches Zentrum für Neurodegenerative Erkrankungen
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910 1 _ |a Deutsches Zentrum für Neurodegenerative Erkrankungen
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910 1 _ |a Deutsches Zentrum für Neurodegenerative Erkrankungen
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910 1 _ |a Deutsches Zentrum für Neurodegenerative Erkrankungen
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