Updates to SURE + ESPIRiT (#58)
Updates to SURE + ESPIRiT (#58)

* Added missing factor of 2.
* Increased resolution of crop threshold.
mrirecon/bart,sdimoudi/bart,sidward/bart,mrirecon/bart,mjacob75/bart,Takishima/bart,sdimoudi/bart,sidward/bart,sidward/bart,Takishima/bart,sdimoudi/bart,mrirecon/bart,mrirecon/bart,Takishima/bart,Takishima/bart,Takishima/bart,sidward/bart,sidward/bart,sdimoudi/bart,mjacob75/bart,sdimoudi/bart,mjacob75/bart,mrirecon/bart,mjacob75/bart,mjacob75/bart