How to display MRI images after MNI standardization
From the image you shared, you already are displaying the MRI after doing the MNI Normalization using the SPM segmentation method. The MNI-segment coordinates in the bottom section of the image below indicate that. For more details refer to this section of the tutorial: https://neuroimage.usc.edu/brainstorm/Tutorials/ImportAnatomy#MNI_normalization