Parkinson's disease is a degenerative disease of the nervous system. Many patients report that numerous examinations did not identify a clear cause of the disease, which is typical of this condition due to the lack of very effective diagnostic methods. Patients' symptoms gradually worsen, manifesting as motor slowness, limb tremors, muscle rigidity, and other clinical signs. There are also symptoms such as constipation and dizziness. Generally, the following examinations are recommended for Parkinson's disease: First, complete a cranial MRI scan. The primary purpose of a cranial MRI is to exclude other causes of Parkinson's-like symptoms, such as cerebral thrombosis, brain tumors, or inflammation. Second, perform olfactory tests, as some patients may experience a significant reduction in their sense of smell early on. Third, conduct induced sleep monitoring, since some patients may have prominent sleep disorders. Additionally, it is suggested to perform striatal dopaminergic transporter imaging, a type of DAT scan. Although this scan is quite expensive, it can clearly reflect the function of the striatum.