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

Exam Review:Exposure

Test #1

QuestionAnswer
The reduction of the total # of x-ray photons remaining in the beam after PASSING through a given thickness of material Attenuation (maybe Total or Partial)
When an x-ray reaches the patient or an object three things might occur. what are they ? 1.Pass thru as un-attenuated 2.Totally attenuated 3.Partially attenuated
The density repeat rule consists if what? Doubling mAs to correct denisty on repeats
the overall Blackness of a radiograph due to the deposit of black metallic silver in the emulsion is called what ______? Density
We have NO x-rays without what??!!! mAs
what is the controlling factor of mAs? Density
what is the influencing factor of Density kVp
The selected electrical current going thru the tube is what?? mA
how long do we allow the current to flow ? in Seconds
As mAs increases, what happens to x-ray exposure and image density ? does it increase or decrease? INCREASES
If your image is too light, what can you do to fix it? Double your mAs (mass)
If your image is too dark, what can you do to fix it? Half your mAs (mass)
"The density present on an image receptor should remain UNCHANGED as long as the intensity & duration of the x-ray exposure remains UNCHANGED" Reciprocity Law
The "minimal" change necessary to cause a visible shift (SEE A DIFFERENCE) in radiographic density is ____ of the mAs or any factor(s) that would equal this change: 30 %
mAs is directly proportional with what? Density
Name other factors that can affect KVP: *** there are a total of *** Focal Spot, Anode Heel Effect, Distance, Filtration, Beam Restriction, Anatomy, Grids, IRs, Processing
Never make changes to _______ unless the resultant change to contrast is desired and/or acceptable! kVp
For anode heel effect to be present you must have what? -short SID -large field size
What are the types of filtration? inherent added total
As filtration increases, density________. why? Density decreases. B/C less radiation is reaching the radiograph
"The amount of filtration required to cut the intensity to one half the original value" Half-Value Layer
If you restrict the beam, what does that cause ? -less photons striking the patient -less scatter is produced (less density) -less dose to the patient
smaller field size means what? INCREASED BEAM RESTRICTION
larger field size means what? DECREASED BEAM RESTRICTION
anything and everything that reduces the # of x-ray photons striking the IR will decrease what??? density
What are some anatomy factors that can affect density? -pathology, patient size, casts
Grids reduces what to reach IR? SCATTER
Density will be Decreased or Increased when using a grid? DECREASE
What is the grid conversion factors? No Gird 1 5:1 2 6:1 3 8:1 4 10/12:1 5 15/16:1 6
The one of the two photographic properties which comprises "visibility of detail"..is what? DENSITY
What does ALARA stand for? as low as reasonably achievable
Fill in the blanks. unattenuated ________________ totally attenuated _________________ partially attenuated _______________ unattenuated BLACKS totally attenuated WHITES Partially attenuated GRAYS
Who discovered x-rays? Date? Wilhelm Conrad Roentgen November 8, 1895
List all of the properties of X-rays? highly penetrating, electrically neutral, polyenergetic & hetergeneous, travel in straight lines, travel at the speed of light, cause ionization of matter, cause fluorescence of certain crystals,
List all of the properties of X-rays? Part 2 cannot be focused by a lens, affect photographic film, produce secondary scatter
What are the prime factors that are under the control of the technologist? mAs, kVp, Distance
What is the controlling QUANTITY factor?
Created by: jhernandez072389
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