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@ARTICLE{Orzada:167633,
author = {S. Orzada$^*$ and T. Fiedler$^*$ and H. H. Quick and M.
Ladd$^*$},
title = {{L}ocal {SAR} compression algorithm with improved
compression, speed, and flexibility.},
journal = {Magnetic resonance in medicine},
volume = {86},
number = {1},
issn = {1522-2594},
address = {New York, NY [u.a.]},
publisher = {Wiley-Liss},
reportid = {DKFZ-2021-00467},
pages = {561-568},
year = {2021},
note = {#EA:E020#LA:E020# / 86(1):561-568},
abstract = {Local specific absorption rate (SAR) compression algorithms
are essential for enabling online SAR monitoring in parallel
transmission. A better compression resulting in a lower
number of virtual observation points improves speed of SAR
calculation for online supervision and pulse design.An
iterative expansion of an existing algorithm presented by
Lee et al is proposed in this work. The original algorithm
is used within a loop, making use of the virtual observation
points from the previous iteration as the starting
subvolume, while decreasing the overestimation with each
iteration. This algorithm is evaluated on the SAR matrices
of three different simulated arrays.The number of virtual
observation points is approximately halved with the new
algorithm, while at the same time the compression time is
reduced with speed-up factors of up to 2.5.The new algorithm
improves the original algorithm in terms of compression rate
and speed.},
keywords = {MRI (Other) / SAR (Other) / VOP compression (Other) / VOPs
(Other) / local SAR (Other)},
cin = {E020},
ddc = {610},
cid = {I:(DE-He78)E020-20160331},
pnm = {315 - Bildgebung und Radioonkologie (POF4-315)},
pid = {G:(DE-HGF)POF4-315},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:33634530},
doi = {10.1002/mrm.28739},
url = {https://inrepo02.dkfz.de/record/167633},
}