- 1973 Graduate Yonsei Sevrance Medical College, Seoul,Korea
- 1976 College of Medicine Yonsei University.
- Mar 1,1987 – 1988 Exchange Professor Dept. of Radiology State Univ. of New York, Syracuse.
- Jan 1, 1997 – 1998 President Korean Thoracic Radiology Society.
- Mar 1, 1992 - Present Editorial Board of Journal of thoracic Radiology
- Mar 1, 1992 - Present Members of Society of Thoracic Radiology, U.S.A.
- Mar 1, 1992 - Present Board of Korean Thoracic Radiology
- 1984 - Feb, 2013 Professor. Dept. of Radiology. Yonsei University college of medicine.
- Mar 1, 2002 – 2010 Director of Diagnostic Radiology
- Mar 1, 2002 – 2010 Yongdong Severance Hospital, YUMC.
- Mar 1, 2013 – Present Professor emeritus YonSei university
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