Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

RAD Ch. 5 Vocab

QuestionAnswer
Filament A coil of tungsten wire that is the source of electrons for x-ray production.
Space charge An area, filled with electrons created by thermionic emission, that are available for x-ray production.
Target A hard, smooth, slanted metal surface that is bombarded with fast moving electrons
Thermionic emission An electron cloud formed when electrons in the outermost shells get so far from the nucleus that they are no longer held in orbit.
Electron stream Fast moving electrons from the cathode to the anode.
Bremsstrahlung An x-ray photon formed by a change in kinetic energy as an incoming electron changes direction when it nears the nucleus of a target atom.
Heterogeneous Made up of many different wavelengths
Characteristic radiation An x-ray photon formed by the collision of an incoming electron with an inner shell electron.
Focusing cup A hollow area on the cathode containing the filament.
Dual-focus Having two filaments, one small and one large.
Focal spot The area on the target that is struck by the electron stream during the exposure.
Rotating Anode A spinning disc, coated with tungsten on the beveled edge, that is struck by the electron stream during the exposure.
Target angle The slant of the anode surface.
Focal track The tungsten focal area all around the beveled edge of the rotating anode.
Effective focal spot The vertical projection of the electron stream. Influences image sharpness.
Actual focal spot An area on the target surface that is struck by the electron stream.
Line focus principle The result of the electron stream striking an angled target and thus becoming smaller. The steeper the target angle, the greater the difference in size.
Anode Heel Effect The uneven distribution of radiation intensity. Greatest toward the cathode side of the tube.
Filtration The process of removing the long-wavelength photons from the x-ray beam.
Kilovolts peak (kVp) The unit used to measure voltage across the x-ray tube.
Milliampere-seconds (mAs) The unit used to indicate the quantity of exposure. The product of mA and exposure time.
Tungsten (W) A metal element; a large atom with 74 electrons in orbit around its nucleus.
Millisecond (msec) A small unit of measurement. One of these equals 0.001 seconds.
Exposure time The length of time that the x-rays are turned on.
Created by: mshearer10
Popular Radiology sets

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards