Fig. 3

Neuroimaging of the patient. T2*-weighted gradient-echo sequences reveal the presence of hypointensities within the left globus pallidus (a1) and left substantia nigra (a2). The left globus pallidus shows no signal change on computed tomography scan (b) or T1-weighted image (c), while a low signal abnormality is seen on diffusion-weighted imaging (d). The [¹⁸F] N-(3-fluoropropyl)-2β-carbon ethoxy-3β-(4-iodophenyl) nortropane positron emission tomography scan shows no pathological striatal alterations (e)