This work is described in:
Orzada S, Fielder TM, Quick HH, Ladd ME,
"A local SAR compression algorithm with improved compression, speed and flexibility",
https://doi.org/10.1002/mrm.28739.
This new algorithm is an iterative expansion of the exisisting local SAR compression algorithm for MRI proposed by Lee et al. ( https://doi.org/10.1002/mrm.23140)
The number of VOPs is approximately halved with the new algorithm, while at the same time the compression time is reduced with speed-up...