A. Numao 1, K. Suzuki 1, H. Takekawa 2, M. Miyamoto 1, T. Miyamoto 3, M. Iwanami 3, E. Takada 4, K. Hirata 1
1 Department of Neurology, Dokkyo Medical University – Tochigi, Japan
2 Stroke Division, Department of Neurology, Dokkyo Medical University – Tochigi, Japan
3 Department of Neurology, Dokkyo Medical University Koshigaya Hospital – Saitama, Japan
4 Center of Medical Ultrasonics, Dokkyo Medical University – Tochigi, Japan

Objective: In Parkinson's disease (PD), transcranial sonography (TCS) has been used to evaluate substantia nigra (SN) hyperechogenicity as a diagnostic tool. To quantify SN hyperechogenicity in patients with PD and Parkinsonian syndrome (PS), we applied semi-quantified evaluation method.