Fig. 1From: The TRACK-PD study: protocol of a longitudinal ultra-high field imaging study in Parkinson’s diseaseVisualisation of the multi-echo GRE field-of-view (FoV) with 4.8 cm coverage. The FoV is placed perpendicular to the brainstem. The inferior border of the FoV is positioned at the bottom of the 4th ventricle. Furthermore, an example of the multi-echo GRE transverse brain stem slice at the substantia nigra is displayed in the right cornerBack to article page