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Flashcards in Radiology History Deck (13)
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1

Who discovered X-rays?

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

2

The first X-ray of a human in the US

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

3

first X-ray of a human

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

4

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.

5

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

6

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

Hittorf-Crookes vacuum tube

7

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

8

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

Edison

9

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

Edison

10

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

11

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

12

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

13

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

George Eastman