Busy. Please wait.
Log in with Clever

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever

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.
Didn't know it?
click below
Knew it?
click below
Don't Know
Remaining cards (0)
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

Bushong ch 7

The x-ray tube

What is the name of the most frequently used support system? ceiling support
What components make up the external structure of the x-ray tube? support structure, protective housing, glass or metal enclosure
The ______ _______ provides mechanical support. protective housing
What is the positive side of the x-ray tube called? anode
What is the negative side of the x-ray tube called? cathode
This occurs when the tungsten vaporizes,coats the inside of the glass housing, and then causes the current to stray. arcing
What are the 2 parts of the cathode? filament, focusing cup
What is the most common cause of tube failure? tungsten vaporization
What is the filament made of? tungsten
The boiling off of electrons is known as? thermonic emission
What is the target of a rotating anode coated with? tungsten
What does thermonic emission cause to happen at the filament? space charge effect
WHat is the actual source of x-rays in the tube? the focal spot
What is the size of most filaments? 1-2 cm long, 2mm wide
When is the small focal spot used? when better spatial resolution is required
What turns the rotating anode? magnetic field
Name the 2 types of anodes. stationary and rotating
How much of the electron interaction with the anode turned into heat? 99%
What is the target of the anode? the area of the anode struck by electrons from the cathode
What is a rotating anode made of? tungsten alloy
High capacity tubes rotate at up to ________ rpm. 10,000
What components make up the induction motor? rotor, stator
what is the rotor? a shaft made of copper and soft iron
What is the stator? a series of magnets placed around the neck of the tube
What is the anode heel effect? When the intensity is greater on the cathode side than the anode
The smaller the ______ the greater the heel effect. angle
When imaging a larger patient, the ______ should be directed over the larger part. cathode
Due to the line focus principle, the target angle is made _______, so the effective focal spot is ________. smaller, smaller
What is the formula for Heat units of a 3phase 6 pulse x-ray machine? 1.41 X kVp X mA X s
What does it mean when a tube has 2 focal spot sizes or a dual tube? it has 2 filaments
What does each tube rating charts have in common with one another? they are all the maximum eposure times that is safe for the tube
Where is the stator located in the x-ray tube? outside the glass enclosure
Where is the rotor located in the x-ray tube? inside the glass enclosure behind the anode
What causes the anode heel effect? the angle of the stationary anode
This occurs when the electrons bounce off the focal spot and land on other areas of the target, causing x-rays to be produced outside the focal spot(scatter). off focus radiation
The actual focal spot size is ______ than the effective focal spot size in the line focus principle. larger than
When the anode has pits or cracks in it, what caused this? the temp of the anode is excessive during a single exposure
Created by: radgirl37
Popular Radiology sets




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:
restart all cards