In addition, the uptake of [18F]FTPQ in PD brains increased over the experimental period, suggesting the radioactivity accumulation can be a quantification index for monitoring PD activity (Fig. 4) although the profile was inconsistent with the previous [11C]PK11195 autoradiography results, which demonstrated the maximum TSPO expression occurred on day 7 p.l. [20]. The gene discussed is TSPO; the disease is Parkinson disease.