AIM: To evaluate the adequacy and impact of PATIENTS AND METHODS: Retrospective study involving 249 patients with suspected parkinsonism (PK) of uncertain origin. All underwent RESULTS: 91.57% of the requests were appropriate, while 8.43% did not adhere to the guidelines. Diagnosis changed in 48.6% of cases and management in 70.68% after the scan, especially in inconclusive cases and initiation of therapy. General neurologists evaluated more cases and made more appropriate requests (96.3% vs 76.67%
p<
0.001). However, MD specialists, despite less appropriate use of the guidelines, achieved a higher number of conclusive diagnoses in complex cases.