Users of CMU medical system 25-hospital data
Researchers using 5.37M medical records
Researchers using medical imaging (X-ray/CT/MRI)
Biomedical signal/gene/physiology data analysts
AI/smart medicine researchers
Patients benefiting from privacy protection

China Medical University Hospital, led by Vice Superintendent Chun-Liang Chen and Manager Han-Mi Chen, integrates the IT Office (data source), Big Data Center (clinical data de-identification), and AI Medical Diagnosis Center (medical imaging de-identification) into the "Hidden but Not Obscured" smart medical data management mechanism. The CMU medical system encompasses 25 hospitals with 5.37 million accumulated records covering text records, medical imaging (X-ray/CT/MRI), biomedical signals (ECG/EEG), bioinformatics (genes), and personal physiological/environmental data, spanning medical centers, regional, district hospitals, and clinics. Clinical data de-identification uses pseudonymization (ID hash as primary key), merger transformation (ordered encryption of visit/form numbers), fuzzification (dates to ages, addresses to towns), text report processing, and consistency transformation (offset by same value to preserve research value). Medical imaging de-identification handles DICOM tags by classification and masks/restores personal info in image margins. Implemented in 2020 conforming to ISO/IEC 29100, ISO/IEC 29191, CNS 29100-2—Taiwan-first and only medical institution to pass CNS 29100-2 accreditation. Established a one-way hashing mechanism for de-identified yet linkable data; published 40+ papers, obtained 12 patents (4 pending review), 1 US FDA approval (K212624), 4 FDA/TFDA medical software licenses.