1. Nishina Memorial Cyclotron Center, Japan Radioisotope Association, 348-58 Tomegamori, Takizawa, Iwate 020-0173, Japan
2. Radioisotope section, Japan Radioisotope Association, 2-28-45 Honkomagome, Bunkyo, Tokyo 113-8941, Japan
3. Cyclotron Research Center, Iwate Medical University, 348-58 Tomegamori, Takizawa, Iwate 020-0173, Japan