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Flashcards in Radiology History Deck (13)
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Who discovered X-rays?

Wilhelm Conrad Roentgen discovered X-rays on Nov 8, 1895


The first X-ray of a human in the US

at Dartmouth College- the film was a wrist film of an
adolescent boy


first X-ray of a human

was a (left) hand X-ray of Mrs. Roentgen


In the first few weeks of exploring the characteristics of X-rays Roentgen observed most of the physical characteristics of X-rays except which one?

He failed to identify the potential biological effects of X-rays, which would be an important omission from
society’s understanding of the capabilities of X-rays… in a bad way.


Roentgen observed what physical characteristics of X-rays?

- Travel in straight lines at the speed of light
- Diverge into space from source until absorbed
- Cause certain crystals to fluoresce
- Have a photographic effect
- Cannot be detected by human senses
- Differential penetration through matter is determined by mass or density of that matter
- Cannot be refracted by a lens
- Cannot be deflected by a magnet


What was the tube being used by Roentgen when X-rays were discovered

Hittorf-Crookes vacuum tube


Who demonstrated that electrons traveled in a divergent pattern from a cathode; that electrons could be focused, and that electrons created heat when aimed at a metal target?

Hertz and Lenard


Who determined that calcium tungstate was the best fluorescent material to use with X-rays after
evaluating over 1800 different materials?



Who walked away from his work after his lab assistant, Clarence Dally succumbed to radiation-induced injuries after several years of consistent exposure?



Who created the most advanced transformer of the day (the Interrupterless Transformer) to
elevate energies available to the tubes and to increase X-ray energies?

Homer Snook


Who invented the first X-ray grid that reduced the amount of scatter radiation (and the resultant fogging of the image that scatter caused) that reached the film

Gustav Bucky


Who created a hot cathode ray tube design that would be the benchmark for tubes
for many decades to come (angled anode, etc.)?

William David Coolidge


Who developed the first X-ray film that was not photographic film?

George Eastman