Fig. 1
From: Volume expansion of periaqueductal gray in episodic migraine: a pilot MRI structural imaging study
The creation of PAG template and individual PAG. Top line represents the PAG template created by MRIcron based on mni_icbm152_gm_tal_nlin_asym_09a template. Bottom line represents the individual PAG created by deformation field. The last column represent three-dimensional reconstructed image of PAG template and individual PAG, which were created by ITK-SNAP (version 3.6.0 beta) (http://www.itksnap.org)