Robert S. Ledley

Robert S. Ledley

(미국 치과의사, 1926~)

...... Robert S. Ledley 는 1971년 조지타운대서 영상정보시스템을 개발하여 염색체 (Chromosome) 분석에 성공했고, 1974년 Automatic Computerized Transverse Axial Scanner (ACTA) 을 만들어 임상환자에 시험 적용, 임상적으로 뇌종양으로 진단된 환자에서 뇌위축 (Atrophy) 을 발견하여 그 임상가치를 증명하는 개가를 올렸다. 1975년에 ACTA는 Pfizer Inc.에 앞으로 10년 간의 연구비를 제공하는 조건으로 양도됐으며 이는 CT (Computerized Axial Tomography) Scanner로 그 이듬해부터 시판되기 시작하였다...........

Robert S. Ledley 는 X-ray 진단스캐너인 전신용 CT (computerized tomographic) 를 발명했다. ACTA Scanner 란 이름으로 현대적 CT scanners 의 기본설계를 가지고 있으며, 최초로 CT 영상 구축을 위한 convolution method 를 사용하였으며, 최초로 의료영상용 고해상도 디지탈 TV 화면을 가진것이었고, 받침대가 기울어지게 되어었었다.

Born in New York City, Ledley earned a D.D.S. from New York University in 1948 and an M.A. from Columbia University a year later. During the next 20 years he served in a variety of academic and research positions at the National Institute of Standards and Technology (formerly National Bureau of Standards), Johns Hopkins University, and George Washington University, before becoming a professor of physiology and biophysics and of radiology at the Georgetown University Medical Center. With more than 20 patents to his name, Ledley is best known for developing the ACTA (Automatic Computerized Transverse Axial) diagnostic X-ray scanner, the first whole-body computerized tomography (CT) machine. In addition to the ACTA scanner, Ledley patented the image processor (originally called the Texture Analysis Computer or TEXAC). He wrote the first comprehensive textbook for engineers on digital computer engineering. He also developed the computational methods in Boolean algebra, used in digital circuit design. Ledley wrote the seminal paper for the field of Medical Informatics on computer use to aid in medical diagnosis.

Ledley is editor-in-chief of four reviewed scientific journals and has been the president and research director of the National Biomedical Research Foundation since 1960.

term :

의료정보학 (Medical Informatics) 치과 (Dentistry) 의료 (Medicine) 의용생체공학 (Biomedical Engineering) 컴퓨터비전 (Computer Vision) 패턴인식 (Pattern Recognition) Robert S. Ledley

site :

Robert Ledley : Georgetown Univ. National Biomedical Research Foundation (NBRF)

National Inventors Hall of Fame

paper :

Reasoning foundations of medical diagnosis : Ledley RS (치과의사), Lusted LB (방사선과의사). George Washington University, Washington, D.C. 1959
Digital Computer and Control Engineering, McGraw-Hill Book Co., New York, 1960.
Switching Circuit Theory and Logical Design, Robert S. Ledley (ed.), American Institute of Electrical Engineers, New York, 1961.
Programming and Utilizing Digital Computers, McGraw-Hill Book Co., New York, 1965.
Use of Computers in Biology and Medicine, McGraw-Hill Book Co., New York, 1965.
FORTRAN IV Programming, McGraw-Hill Book Co., New York, 1966.
Pictorial Pattern Recognition, Robert S. Ledley, George Chen, Donald Pollock, and Azriel Rosenfeld (eds.), Thompson Book Company, ashington, DC 1968.
Engineering Analysis of Dental Forces: Theory and Application, National Biomedical Research Foundation, 1969.
Cross-Sectional Anatomy: An Atlas for Computerized Tomography, Robert S. Ledley, H.K. Huang, J.C. Mazzioti. Williams and Wilkens, Co., Baltimore, MD, 1977.