Save
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

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.

Question

Wave-like fluctuations of electric and magnetic fields describes what kind of radiation?
click to flip
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't know

Question

What unit is frequency measured in?
Remaining cards (34)
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

RADT 456 RAD PROT.

ARRT registry review covering radiation protection

QuestionAnswer
Wave-like fluctuations of electric and magnetic fields describes what kind of radiation? Electromagnetic; Pg. 225
What unit is frequency measured in? hertz (Hz); Pg. 225
What is the greatest portion of our background radiation exposure due to? Naturally occurring sources; Pg. 226
What percent of the x-ray beam is made up of Bremsstrahlung radiation? 70-90%; Pg. 227
T/F: The energy of the characteristic ray is equal to the difference in energy between the K and L shells. True; Pg. 227
T/F: The photoelectric effect is more likely to occur in absorbers having low atomic number and with high-energy photons. False; high atomic number and low-energy photons; Pg. 228
Compton scatter can contribute to image ___ and pose a radiation hazard to ___. fog/personnel; Pg. 229
What kind of curves are used to illustrate the relationship between exposure to ionizing radiation and possible resultant biologic responses? Dose-responce curves; Pg. 230
T/F: A nonthreshold curve has no safe dose. True; Pg. 231
What kind of risks are characterized by nonlinear dose responses and are associated with a threshold (safe) dose below which no effect is observed? Deterministic risks; Pg. 232
The Law of Bergonie and Tribondeau stated that which 3 kinds of tissues or cells are particularly radiosensitive? Stem cells, Young immature tissues, and Highly mitotic cells; Pg. 233
T/F: Diagnostic x-rays are considered high LET radiation. False; low LET radiation; Pg. 234
What kind of effect occurs when the ionizing particle interacts directly with the key molecule (DNA) or another critical enzyme or protein. Direct effect; Pg. 234
What kind of effect takes place when ionization takes place away from the DNA molecule, in cellular water? Indirect effect; Pg. 234
What does the 10-day rule state? The first 10 days following onset of the menses is the safest time to schedule elective procedures of the abdomen/pelvis.; Pg. 238
What kind of effects of radiation are those that affect the irradiated body itself? Somatic effects; Pg. 240
What is probably the single most important factor in keeping patient dose to a minimum? Beam restriction; Pg. 250
T/F: Inherent filtration tends to decrease as the x-ray tube ages. False; increase; Pg. 253
What are the three different kinds of gonadal shields? Flat contact, shadow, and contour (shaped) contact; Pg. 255
T/F: Repeat exposures contribute to a significant increase in unnecessary patient exposure. True; Pg. 259
When testing reproducibility, any variation in output intensity must not exceed ___%. 5%; Pg. 262
When testing linearity, any variation in output intensity must not exceed ___%. 10%; Pg. 262
What is the principal source of scattered radiation? The patient; Pg. 269
What are the cardinal principles of radiation protection? Time, distance and shielding; Pg. 269
The intensity of scattered radiation 1m from the patient is approximately ___% of the intensity of the primary beam. 0.1%; Pg. 270
Lead aprons and lead gloves must be at least ___mm Pb equivalent. 0.25mm; Pg. 271
What does it mean that lead aprons, lead gloves, and other apparel are secondary barriers? They do not provide protection from the useful beam; Pg. 273
The gestational dose limit to the fetus during the gestation period must not exceed 500 mrem. What is this amount in mSv? 5 mSv; Pg. 274
What is the internationally accepted unit of measure for exposure to x- or gamma radiations? Roentgen; Pg. 281
What is the number assigned to different types of ionizing radiations so that their effect(s) may be better determined? Radiation weighting factor (Wr); Pg. 282
What kind of monitoring device contains a thin layer of aluminum oxide (Al2O3)? Optically stimuled luminescence (OSL); Pg. 283
What kind of monitoring device uses various filters to determine the type and energy of ionizing radiation received? Film Badge; Pg. 284
What monitoring device contains crystalline chips of lithium fluoride (LiF)? Thermoluminescent dosimeter (TLD); Pg. 285
What kind of dosimeter is worn with high exposures or large quantities of radiation for short periods of time and allows an immediate reading to the user? Pocket dosimeter; Pg. 285
A pregnant radiographer's gestational exposure to the fetus must not exceed ___ rem. 0.5 rem; Pg. 289
Created by: Kaci Gehlhausen
Popular Radiology sets

 

 



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