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Figure 2: Brain magnetic resonance imaging of the patient shows the decreased volume of bilateral caudate nuclei and putamen on T1 and T2 weighted image (a). Brain [18F]fludeoxyglucose-positron emission tomography (PET) of the patient shows hypometabolism of the caudate nuclei, putamen on both sides, and frontal cortex (arrows) (b). Early perfusion image of [18F]F-N-(3-fluoropropyl)-2β-carboxymethoxy-3β-(4-iodophenyl) nortropane (FP-CIT)-PET showed mildly decreased blood flow at both caudate nuclei (c). Brain [18F]FP-CIT PET showed mildly decreased dopamine transporter binding at the bilateral caudate nuclei (arrows) (d)

Figure 2: Brain magnetic resonance imaging of the patient shows the decreased volume of bilateral caudate nuclei and putamen on T1 and T2 weighted image (a). Brain [<sup>18</sup>F]fludeoxyglucose-positron emission tomography (PET) of the patient shows hypometabolism of the caudate nuclei, putamen on both sides, and frontal cortex (arrows) (b). Early perfusion image of [<sup>18</sup>F]F-N-(3-fluoropropyl)-2β-carboxymethoxy-3β-(4-iodophenyl) nortropane (FP-CIT)-PET showed mildly decreased blood flow at both caudate nuclei (c). Brain [<sup>18</sup>F]FP-CIT PET showed mildly decreased dopamine transporter binding at the bilateral caudate nuclei (arrows) (d)