Research and development of new
radiopharmaceuticals,
research and clinical application of positron emossion
tomography (PET) and cyclotron technology. Nuclear
neurology area including diagnosis and treatment in
demeutia, epilepsy and brain tumors. Radionuclide
treatment in various diseases. Quantitative and
qualitative
analysis in nuclear brain imaging.

1981~ Instructor, Assistant Professor, Associate Professor Professor, Seoul National University College of Medicine
1984~1986 The Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
1990~1998 Chairman, Department of Nuclear Medicine, Seoul Nat. Univ. Hosp.
1993~1996 Chairman, Board of Trustee, The Korean Society of Nuclear Medicine
1997~2003 A Member of Board of Trustee, Korean Atomic Energy Research Institute
1997~2000 Director of Clinical Science, Korean Academy of Medical Sciences
1997~ President, Korean Society of Medical and Biological Engineering
1996~2000 Associate-Dean for Research Affairs, Academic Affairs
2002~2004 President, Korean Society of Human Brain Mapping
2002~2006 President, World Federation of Nuclear Medicine and Biology
2001~ Chairman, ARCCNM(Asian Reginal Cooperation Council for Nuclear Medicine)
2001~ Vice President, Korean Radioisotope Association