Robert Ledley, American physiologist and physicist, invented the CT scanner (b. 1926)
Robert Steven Ledley (June 28, 1926 – July 24, 2012), professor of physiology and biophysics and professor of radiology at Georgetown University School of Medicine, pioneered the use of electronic digital computers in biology and medicine. In 1959, he wrote two influential articles in Science: "Reasoning Foundations of Medical Diagnosis" (with Lee B. Lusted) and "Digital Electronic Computers in Biomedical Science". Both articles encouraged biomedical researchers and physicians to adopt computer technology. In 1960 he established the National Biomedical Research Foundation (NBRF), a non-profit research organization dedicated to promoting the use of computers and electronic equipment in biomedical research. At the NBRF Ledley pursued several major projects: the early 1960s development of the Film Input to Digital Automatic Computer (FIDAC), which automated the analysis of chromosomes; the invention of the Automatic Computerized Transverse Axial (ACTA) whole-body CT scanner in the mid-1970s; managing the Atlas of Protein Sequence and Structure (created in 1965 by Margaret O. Dayhoff); and the establishment of the Protein Information Resource in 1984. Ledley also served as editor of several major peer-reviewed biomedical journals. In 1990, Ledley was inducted into the National Inventors Hall of Fame. He was awarded the National Medal of Technology in 1997. He retired as president and research director of the NBRF in 2010.
2012Jul, 24
Robert Ledley
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Events on 2012
- 13Jan
Costa Concordia disaster
The passenger cruise ship Costa Concordia sinks off the coast of Italy due to the captain's negligence and irresponsibility. There are 32 confirmed deaths. - 2Jun
2011 Egyptian revolution
Former Egyptian President Hosni Mubarak is sentenced to life imprisonment for his role in the killing of demonstrators during the 2011 Egyptian revolution. - 19Jun
Julian Assange
WikiLeaks founder Julian Assange requested asylum in London's Ecuadorian Embassy for fear of extradition to the US after publication of previously classified documents including footage of civilian killings by the US army. - 11Sep
2012 Benghazi attack
The U.S. embassy in Benghazi, Libya is attacked, resulting in four deaths. - 23Oct
Digital switchover
After 38 years, the world's first teletext service (BBC's Ceefax) ceases broadcast due to Northern Ireland completing the digital switchover.