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


Chapter 8 Vocab

Radiolucent A substance that is easily penetrated by the x-ray beam.
Backscatter Radiation from the cassette back and the cassette tray that is directed back toward the film.
Film/screen contact The tightly pressing of the intensifying screens against the film when the cassette is closed.
Fluoresce As phosphors glow, giving off light when exposed to x-rays.
Phosphors Fluorescent crystals in the surface of an intensifying screen.
Screen speed The efficiency of a screen in converting x-rays to light.
Rare earth phosphors Crystals containing either gadolinium, lanthanum, yttrium.
Artifacts Unwanted marks or images on the radiograph.
Spectral sensitivity The portion of the electromagnetic spectrum to which the film is most sensitive.
Sensitometric curve An S shaped curve demonstrating the response of a film to a full range of exposure.
D-Max The maximum density on a sensitometric curve.
Optical density (OD) A numerical representation of the films ability to transmit light.
Base+Fog Density The measure of light absorbed by the film base plus any fog exposure to the film before processing.
Latitude The term used to describe the range of densities that can be recorded on an x-ray film.
Straight-line portion The portion of the graph that is in a relatively straight, vertical position and indicates film speed.
Spectral emission The color of light emitted by a phosphor.
Silver halide Silver salts of the halogen elements that are mixed with gelatin to form the film emulsion.
Created by: hollieritter