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15 Cards in this Set

  • Front
  • Back
Define: Electromagnetic radiation
a form of energy that travels thru space as a wavelength and frequency.
What is an atom?
Smallest unit of life.
Consists of protons, neutrons, and electrons.
True or False:
The cathode is positively charged.
Where are the electrons released from on the x-ray?
The negatively charged cathode.
What percent is heat that is created from excited electrons?
What does the glass envelope do for the x-ray machine?
creates a vacuum environment to produce an x-ray.
What is the coiled filament called on the cathode?
tungsten wire
How many filaments are found in a modern radiograph unit?
What is the amount of energy created in the cathode called?
milliamperage (mA)
What is the acceleration of electrons from the cathode to the anode controlled by?
What is the base of the target of the anode made out of?
How much milliamperage is the rotating anode capable of outputting?
100-300 mA
What does a small focal spot result in?
Strong x-ray beam toward the cathode side, great reduction of the intensity of the x-ray beam towards the anode side.
Define: Heel effect
The heel effect is the variation of the x-ray beam. The smaller the anode angle, the greater the heel effect.
Define: Kilovoltage
KV= 1,000 volts
amount of electrical energy applied so that the electrons accelerate from the cathode towards the anode.