Chap 1 - Concepts of Radiologic Science

2. X-ray tubes in use today are refinements of the this type of tube
7. Cellulose ______ was a substitute for the glass plates originally used in radiography
8. Energy released by a chemical reaction
10. Discovered x-rays
11. Quantity of matter contained in any physical object
13. Restricts the useful beam to the part of the body that is being imaged
16. Removal of an electron from an atom
17. ______ emulsion radiography used 2 glass plates with the emulsion surfaces together. This halved the exposure time.
18. X-ray ______ is measured in milliampere (mA)
20. Radiation that results from deposits of uranium, thorium, & other radionuclides in the Earth
23. Type of rays emitted by the sun & stars
26. Kinetic energy of molecules
28. X-ray ______ is measured in kilovolt peak (kVp)

1. First to use a diaphragm to restrict the x-ray beam
2. Large, partially evacuated tube first used to make x-rays
3. Energy that represents the work that can be done when an electron moves through an electrical potential difference
4. First x-ray fatality in the U.S.
5. Absorbs low energy x-rays before they reach the patient
6. Anything that occupies space & has mass
7. Energy contained within the nucleus of the atom
9. First American to invent a moving grid
12. Type of energy that is the ability to do work by virtue of position
14. Type of screen that helped reduce exposure time
15. Energy of motion
19. Largest source of natural environmental radiation
21. Energy emitted & transfered through space
22. Invented the stationary grid
24. Introduced an interrupterless transformer to use in place of static machines & induction coils
25. The ability to do work
27. Developed the fluoroscope