Hi SPMer:

  In my experiment,we can only get one volume images Using Siemens GRE field map sequence.I do not know what type(It looks like phase
images, but i am not sure).

  Can someone give some cue how to how to acquire the raw data  for FieldMap toolbox.In seimens 3T Trio MRI, which sequence should  I use?

 

 thanks

LeiNa