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Robert Ledley Papers, 1972-1984

view Robert Ledley Papers, 1972-1984 digital asset number 1
Creator:
Ledley, Robert S
Creator:
National Biomedical Research Foundation Georgetown University
Subject:
Automatic Computerized Transverse Axial Scanner
Computer-Assisted Tomography Scanner
National Biomedical Research Foundation Georgetown University
Physical description:
3 cu. ft. : 6 boxes, 2 oversized folder
Type:
Albums
Collection descriptions
Articles
Correspondence
Design drawings
Diagrams
Manuals
Motion pictures (visual works)
Notes
Patents
Photographs
Slides (photographs)
Date:
1971
1971-1984
1972-1984
20th century
1970-1990
1950-2000
Notes:
Robert Ledley helped develop the world's first whole-body, computer-aided tomograph (i.e., CAT scanner), known as the ACTA Scanner in 1973 at Georgetown University. Previous CT scanners could scan the head only, and required use of a water bath. Ledley developed a whole body scanner that did not need a water bath. All CT scanners now in use are based on this one. Ledley formed his own compan, Digital Information Science Corporation (DISCO), but sold the manufacturing rights to the ACTA Scanner to Pfizer in 1975.
Summary:
The collection includes manuals for computers that were used with the early versions of the scanner, Ledley's research notes and papers; schematics for the scanner; slides of the scanner and of images it produced; biographical information on Ledley; Ledley's patents; articles about Ledley; letters of inquiry and correspondence relating to getting the scanner built; a user's manual for the scanner, including drawings and assembly and operational information; a 16mm film on the history of the scanner; a photograph album of pictures of Dr. Ledley, of the scanner, and of some of the images produced by the scanner; a large diagram of the scanner.
Cite as:
Robert Ledley Papers, 1972-1984, Archives Center, National Museum of American History
Topic:
Biology
Diagnostic imaging
History of science and technology
Inventions
Inventors
Medical radiology
Medicine
Radiology
Tomography
Whole body imaging
Medical technology
Digital Information Science Corporation
Medical innovations
Local number:
2008.3048 (NMAH Acc.)
Data Source:
Archives Center - NMAH

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  • Automatic Computerized Transverse Axial Scanner
  • Computer-Assisted Tomography Scanner
  • Ledley, Robert S
  • National Biomedical Research Foundation
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