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

AEC devices

QuestionAnswer
AEC Device A device that measures the quantity of radiation reaching the image receptor and automatically terminates the exposure when the image receptor has received the required radiation intensity
Phototimer Device The x-ray beam passes through the patient, tabletop, and cassette before it strikes the photo detector calibrated by setting the capacitor-discharge point at a level that produces a satisfactory exposure (density) to the image receptor
Fluorescent screen Absorbs x-rays and produces light photons, which are then directed to photomultiplier tube
Photomultiplier tube Produces electrons from the light photons received from the fluorescent screen
Capacitor Receives electrons from the photomultiplier tube and is charged until it reaches a preset value. When the capacitor reaches its preset value, it discharges, triggering a thyratron and opening the relay to terminate the exposure.
Ionization Chamber Device The x-ray beam passes through the patient and tabletop before striking the ionization chamber.THE IR IS PLACED UNDER THE ION CHAMBER (RADIOLUCENT)
Why is it critical that the radiographer knos the size and shape of the Ionization chamber? AEC will not calibrate exposure correctly for the part they are shooting.
Backup Timer timer set in case AEC fails to terminate exposure. Set to NOT EXCEED 150% EXPECTED MASS. Regulations require that AEC’s have a 600 mAs (for over 50kVp) and 2,000 mAs (for under 50kVp) safety override.
AEC Control Panel Tech sets the kVp,mA, back up time, appropriate sensor. OD control (estimate patient thickness).
What are two types of AECs? phototimer and Ionization Chamber
What type of AEC is located between patient and the IR? Ionization chamber
What electric timer is set in case the AEC fails to terminate exposure? Backup Timer
Created by: bcmoody
 

 



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