Save
Upgrade to remove ads
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

Rad201 Exam 1

QuestionAnswer
What is exposure? Exposure is the ionization of air caused by radiation. It is measured in C/kg or mR.
What is absorbed dose? Absorbed dose is the amount of radiation energy absorbed by the body or a material. It is measured in mGy.
What is effective dose? Effective dose shows the overall effect of radiation on the body. It is measured in mSv.
Why is radiation protection important? Radiation protection helps reduce the risk of harm to patients, workers, and the public from ionizing radiation.
What device measures exposure? An ionization chamber measures radiation exposure.
What does BERT stand for? BERT stands for Background Equivalent Radiation Time.
What is the BERT for a chest radiograph? About 10 days of natural background radiation.
What is absorption? Absorption is when x-rays transfer their energy to body tissues.
What material is usually used for the x-ray tube target (anode)? Tungsten or a tungsten-rhenium alloy.
What is attenuation? Attenuation is the reduction of x-ray photons due to absorption or scatter.
What is the difference between absorption and scatter? In absorption, the photon disappears after giving up all its energy. In scatter, the photon changes direction and keeps some energy.
What are negative contrast media? Air or gas, which make structures appear darker on the image.
What is radiographic fog? Unwanted scattered radiation that reduces image contrast.
Who discovered x-rays? Wilhelm Conrad Roentgen discovered x-rays in 1895.
What is radiodermatitis? Reddening and damage to the skin caused by radiation exposure.
What does effective dose (EfD) measure? The overall risk of radiation exposure by considering the type of radiation and the organs exposed.
Created by: dani.vouga04
 

 



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