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

Exam 1 Rad201

QuestionAnswer
BERT Background Equivalent Radiation Time)
NEXT Program (National Evaluation of X-ray Trends) Tracks exposure levels in diagnostic imaging facilities
Exposure (x) Coulomb/kg Measures ionization in air
Absorbed Dose (D) Gray (Gy) Energy absorbed per kg of tissue; 1 Gy = 1 J/kg
Equivalent Dose (EqD) Sievert (Sv) Accounts for type of radiation (WR factor)
Effective Dose (EfD) Sievert (Sv) Accounts for tissue weighting factor (WT)
Collective Effective Dose (S): š‘† = Average Dose Ɨ Number of people Example: 400 people Ɨ 0.25 Sv = 100 person-Sv
Ionizing Radiation: X-rays, gamma rays, alpha particles, beta particles, neutrons Can remove electrons from atoms ā†’ create free radicals
Non-ionizing Radiation: Radio waves, microwaves, visible light
Radiation Interactions with Matter: photoelectric effect, compton scattering, coherent/elastic scattering, pair production, x-ray dual nature.
photoeletric effect inner electron ejected ā†’ creates photoelectron + characteristic photon
Compton Scattering: outer electron ejected ā†’ scatter in all directions
Coherent/Elastic Scattering: low-energy photons ā†’ vibrate atom, little energy transfer
Pair Production: photon >1.022 MeV ā†’ creates electron + positron ā†’ annihilation ā†’ matter ā†’ energy
X-ray Dual Nature: wave-particle duality (photon and wave properties)
Consequences of Ionization in Cells Creation of unstable atoms Production of free electrons Formation of free radicals ā†’ poisonous to cell Injury to cell ā†’ abnormal function/loss of function
Tissue Reactions: Early (deterministic): redness, blood disorders, organ atrophy, intestinal disorders
Late cataracts, fibrosis, reduced fertility, sterility
Stochastic Effects: cancer, genetic mutations; no threshold
Created by: Gina_d2
 

 



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