Test 1 Flashcards
Crookes Tube
Used for cathode rays; stream of electrons
Who discovered the Crookes tube
Sir William Crookes
Nov 8, 1895
Dr. Wilhelm Conrad Roentgen “discovered” x-rays
Feb 10, 1923
First medical use of x-rays in US
Eddie McCarthy
X-rayed by the frost brothers at Dartmouth college
What are the 3 specific areas of phys sci
- Vacuums
- Electricity
- IR materials
Vacuums
Improved evacuation
- Better vacuum tubes
Electricity
Improved on the production of generators
Who furthered the study of cathode rays?
Michael Crookes
Who created the first photographic copy of written material and when?
J.H. Scholtz in 1727
Who produced and patented roll-paper film and when?
George Eastman
Who produced a film gelatin silver bromide emulsion and when?
R.L Maddox in 1871
Who invited the Coolidge X-ray tube and when?
William Coolidge in 1913
What are the characteristics of the Coolidge tube?
- Hot cathode X-ray tube
- Vacuum tube
- Coolidge tube matched w/ Snook transformer
What are some of the advantages for the Coolidge tube?
- Allowed for x-ray energy and intensity to be selected separately
- KvP controls energy
- mA controls intensity
General public misuse
- Circus
- entertainment
- Dept stores & fairs
- “bone portraits”
- shoe fitting
- Manufacturing co.
- X ray specs
- lead underwear
- Wealthy
- purchased x-ray machines
Who developed the fluoroscope and when?
Thomas Edison in 1898
-originally called the vitascope
What materials did Edison use for experiments?
- Barium platinocyanide
- Calcium tungstate (best)
- Zinc cadmium sulfide
Who was the first noted x-ray fatality in the US?
Clarence Madison
-Edison’s assistant
What are some other noted injuries?
- Thomas Edison
- eyes
- Skin damage
- Loss of hair
- Anemia
* All caused by low dose radiation/long exposure time
When were acute injuries starting to be controlled and why?
- 1910
- improvement in equipment
- higher energy beams
- more attention to radiology safety
