Coronal T2-weighted images showing the STN in a patient with advanced PD (spin-echo acquisition; TR/TE/NEX, 2200 ms/90 ms/2). Coronal T2-weighted images showing the STN in a patient with advanced PD (spin-echo acquisition; TR/TE/NEX, 2200 ms/90 ms/2). Section thickness is 2 mm, located every 1 mm. A, The section is located 1 mm behind the anterior limit of the red nuclei. Both STNs are seen as almond-shaped hypointense structures above the locus niger (arrows). B, This section is located 1 mm in front of A, at the level of the anterior limit of the red nuclei. Both STNs are clearly seen (arrows). C and D, These sections are located 1 and 2 mm in front of B, showing the anterior extension of the STN (arrows). D. Dormont et al. AJNR Am J Neuroradiol 2010;31:15-23 ©2010 by American Society of Neuroradiology