title: [Pioneers of medical physics--Theophil Christen (1873-1920)].
abstract: The Swiss mathematician and physician Theophil Christen was one of the first important pioneers in Medical Physics. He structured the previously confused field of physical concepts and definitions for medical applications of X-rays and paved the way for the modern understanding of dosimetry.
authors.affiliation: Deutsches Rontgen-Museum, Remscheid. buschu@str.de
authors.forename: Uwe
authors.initials: U
authors.lastname: Busch
authors.forename: Werner
authors.initials: W
authors.lastname: Bautz
mesh_terms: D006283:Health Physics / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008297:Male; D013557:Switzerland; D014965:X-Rays