RAD190-ch5.txt

Match the x-ray tube part with the appropriated description(s).
A. anode B. cathode
6. Positively charged
7. Negatively charged
8. Contains the target
9. Contains the filament
10. Heated to produce thermionic emission of electrons
11. Often contains small and large filaments (dual focus) within a focusing cup

99% of the energy of the electrons striking the target is converted to _______.

Electron striking the target interacts with target atom nucleus, slows down, losing kinetic energy

Electron striking the target ejects inner shell electron of target atom; an outer shell electron fills

Area of target which with which electrons interaction

Propels electrons toward a specific area of the anode target

Rotates during exposure to distribute heat

Used to provide greater image detail.

The effective focal spot size is smaller than the actual focal spot size.
True False

Because of the anode heel effect, radiation intensity is greater at the cathode and less at the anode ends of the x-ray beam.
True False

To produce a more uniform radiographic density, thinner parts should be positioned under the anode portion of the x-ray beam.
True False

Higher kVp results in x-rays that are less penetrating.
True False

Higher kVp should be used for larger or more dense body parts.
True False

The Pyrex glass envelope of the x-ray tube supports the electrodes and maintains a vacuum.
True False

An exposure made at 200 mA, 0.1 sec, 80 kVp would have ___________ mAs.

____________________ removes low energy x-ray photons from the x-ray beam that cause unnecessary patient exposure.

Radiation scatter production is increased when
A. the collimator is wide open
B. the kVp is high
C. the body part is thick.
D. all of the above