I’m about to start acquiring data on a Siemens Prisma and want to acquire magnitude1/magnitude2/phase1/phase2 field maps, but that doesn’t seem possible. All I can seem to get is magnitude1/magnitude2/phase-difference. Does anyone know if there’s a way to reconstruct the original phase maps from the magnitude1/magnitude2/phase-difference combination?
If anyone knows how to just acquire magnitude1/magnitude2/phase1/phase2 field maps on a Prisma, that would also be great.
Hello @tsalo, did you get any answers regarding your question or did you manage to get Fieldmap from the magnitude1/magnitude2/phase-difference combination? It would help me a lot because I have the same type of data.
I thank you in advance!
From the Siemens data ( magnitude1/magnitude2/phase-difference combination) you can use tools like SPM or FSL to create a Fieldmap: Explanation on how to use those tools are described here:
If your goal is to get the field map, then @jsein’s post is the way to go.
My question was about deriving the original phase maps, before subtraction. I think I was interested in using them for phase-based denoising or something. 
MANAGED BY INCF