Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

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.
We do not share your email address with others. It is only used to allow you to reset your password. For details read 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.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
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

adv img CT 2

advanced imaging - CT set 2

What percentage of radiology exams are CT? 12% of diagnostics
What percentage of the US population’s radiation dose is due to CT? 45%
Axial CT alternate name conventional tomography
CT alternate name trans-axial
Who invented CT and when? Godfrey Houndsfeld in 1967
A voxel is also called what? a houndsfeld unit
What was the first CT unit installed? Where? England, 1969
What type of CT was the first one and who made it? A head unit by EMI
Major downfall of first generation CT scanners? long scan time
Major downfall of third generation CT scanners: ring artifact
What is significant about the second generation CT scanners? they used a fan-shaped beam
What is significant about the fourth generation CT scanners? detectors were stationary
Major downfall of fourth generation CT scanners? pt. dose
What are the advantages of the 5th generation CT scanner? faster, real time
Alternate name for 5th generation CT scanners electron beam tomography
What is significant about 6th generation CT scanners? they’re helical or “spiral” allowing continuous spin of the tube
What is the major advantage of 6th generation CT scanners? abdomen scan time is 30-45s.
What determines section thickness for the 6th gen CT scanner? detector
What do “slices” mean? number of images produced with one tube rotation
What is found in the gantry? x-ray tube, detector array, high voltage generator, couch and mechanical supports
Created by: annaluz87