Hi, I am trying to implement the long version of DKI protocol (2.7 mm cubic) on my Siemens Tim Trio system. I noticed the DKI1 and DKI2 have exactly the same parameters. Is it fine to acquire them with opposite phase encoding directions so I can correct for susceptibility distortion?

Thanks.
-Huiling

Hi Huiling,

You could do that. Note that to correct for susceptibility distortion acquiring a couple B0s in the reverse phase encoding direction is sufficient. Acquiring the whole set in reverse phase encoding is useful to correct for eddy current distortions, however these are minimal when using the bipolar diffusion encoding gradients ( which are standard on the Tim Trio).

Best, 
Emiilie