1983-1989: College of Medicine, Seoul National University, Seoul, Korea
1989-1990: Internship, Seoul National University Hospital, Seoul, Korea
1990-1994: Residency, Department of Radiology, Seoul National University Hospital.
1992-1999: Graduate School of Medicine (Master’s degree & Ph.D. in Radiology), Seoul National University, Seoul, Korea
August 2001-July 2002: Visiting fellow, Children’s Hospital & Regional Medical Center, University of Washington School of Medicine, Seattle, USA.
March 1994-March.1999: Staff radiologist, Chung -Ang Ghil Hospital
April 1999–Feb.2004: Assistant professor, Gachon Medical School, Ghil Medical Center
March 2004-present: Associate Professor, Professor, Director of Pediatric radiology section, & Educational Director, Department of Radiology, Samsung Medical Center, Sungkyunkwan University, School of Medicine
Secretary, Academic Secretary, & President of Korean Society of Pediatric Radiology (1999-2020)
Treasurer, Secretary General, & Academic Secretary, Asian Oceanic Society for Pediatric Radiology, AOSPR (2015- present)
Congress Secretary, Annual Scientific Meeting of the AOSPR 2019/2003
Reviewer, KJR, Journal of the KSR, Clinical Radiology, European Radiology