Hi, Jure
I’m in the process of testing case 2, 3, and 5 as you suggested, and hopefully it will run successfully.
Regarding case4, this field map data does differ significantly from SiemensFieldMap. However, when I was checking the information, I found that Philips has a similar B0 map field map sequence, which does not need to collect the phase difference through two different echo times (ΔTE) to calculate the B0 field map like SiemensFieldMap (we can get the B0 map directly). I doubt that it is possible to set the parameter to PhilipsFieldMap, but I haven’t seen the Philips data and I don’t know the nomenclature of the mapping.txt after the parameter is set to PhilipsFieldMap, so I really need your help.
To make it easier for you and other MRI sequence experts, I’ve attached screenshots of the field map data involved in case4 below, which I hope will help you in your judgment. There are a total of three EchoTime below.
# EchoTime
0.00246 - `restfMRI_B0map_CF203Hz_1`.
0.00492 - `restfMRI_B0map_CF203Hz_1a`, `restfMRI_B0map_Echo1_1`, `restfMRI_B0map_Echo1_1a`, `restfMRI_B0map_Echo2_1a`
0.00738 - `restfMRI_B0map_Echo2_1`
# restfMRI_B0map_CF203Hz_1
"ProtocolName": "restfMRI_B0map",
"ImageType": ["ORIGINAL", "PRIMARY", "M"],
"EchoTime": 0.00246,
"RepetitionTime": 0.7
# restfMRI_B0map_CF203Hz_1a
"ProtocolName": "restfMRI_B0map",
"ImageType": ["ORIGINAL", "PRIMARY", "M"],
"EchoTime": 0.00492,
"RepetitionTime": 0.7
# restfMRI_B0map_Echo1
"ProtocolName": "restfMRI_B0map",
"ImageType": ["ORIGINAL", "PRIMARY", "M"],
"EchoTime": 0.00492,
"RepetitionTime": 0.7
# restfMRI_B0map_Echo1_1a
"ProtocolName": "restfMRI_B0map",
"ImageType": ["ORIGINAL", "PRIMARY", "M"],
"EchoTime": 0.00492,
"RepetitionTime": 0.7
# restfMRI_B0map_Echo2_1
"ProtocolName": "restfMRI_B0map",
"ImageType": ["ORIGINAL", "PRIMARY", "M"],
"EchoTime": 0.00738,
"RepetitionTime": 0.7
# restfMRI_B0map_Echo2_1a
"ProtocolName": "restfMRI_B0map",
"ImageType": ["ORIGINAL", "PRIMARY", "M"],
"EchoTime": 0.00492,
"RepetitionTime": 0.7
I have 500+ cases of data in my hands that are all such field map sequences, so I’d really like to know how to use its suspect field map data to correct it to get a good processing result. (Though this Multi-band data with MultibandAccelerationFactor=7 it’s TR is surprisingly 2s and SliceThickness is 2.5mm, which is very confusing to me with such parameter settings 
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Best, YJia
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