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

Radiation Measures

Radiation Measurement QuizAnswer
Gray Absorbed dose
Sievert Dose equivalent (replaces REM)
REM Dose equivalent (occupational exposure)
Curie Original unit of radioactivity.
Becquerel Unit of radioactive decay
Roentgen Unit of exposure dose in air of x-rays.
Rad Absorbed dose (Patient Dose)
A.L.A.R.A. As Low As Reasonably Achievable
The 3 Cardinal Rules of Rad Protection are: Time, Distance and Shielding
What are 3 Radiation sources? Natural (cosmic rays, terrestrial), Industrial (Nuclear fuel, cosumer products) and Medical (x-rays, nuclear treatment)
Distortion Misrepresentation of size or shape of any anatomic structure
Recorded detail Ability to visualize small structures
Contrast Difference in density between any two areas on a radiograph
Density Degree of film blackening
kVp Primary controlling factor of radiographic contrast.
kVp Formula: cm (x) 2 + 40 = kVp
What 3 factors control quality of radiographs? mA, kVp and exposure time
Reduce exposure for these conditions Old age, Pneumothorax, Emphysema, Emaciation, Atrophy
Increase exposure for these conditions Pneumonia, Enlarged heart, Edema, Pleural effusion
Source to Image Receptor Distance Distance from anode inside x-ray tube to the image receptor.
SID affects: Magnification of body part, recorded detail, patient dose
What are the 4 factors of radiographic quality? Contrast, Density, Detail and Distortion
The quantity of x-rays is dependent upon what? mAs
What unit is used to measure the quantity of radiation received by rad workers? Rem
How are milliamperage and time related to each other when used to maintain density? Inversely proportional
Which one of these factors (kVp, mAs) control radiographic DENSITY? mAs
Which one of these factors control radiographic CONTRAST? kVp
What does the rad and gray have in common? They both measure absorbed dose.
What does the Sievert and the Rem have in common? They both measure the dose equivalent (occupational exposure)
What is the kVp for a part that measures 8cm thick? 56 kVp (8cm x 2 + 40)
Created by: rad1958tech