Nakao Iwata¹、 Enrique ESTRADA LOBATO²、 Jun Hatazawa³、 Hiroshi Toyama⁴ (1.Fujita Health University School of Medicine, Japan、 2.Section of Nuclear Medicine and Diagnostic Imaging, Division of Human Health, Department of Nuclear Sciences and Applications, International Atomic Energy Agency, Austria、 3.Japan Radioisotope Association, Japan、 4.Department of Radiology, Fujita Health University School of Medicine, Japan)