Government Approved Guessing
Unit of measurement used for effective dose____?
What is Sievert
What is the most common shielding material used in medical imaging?
What is Lead
Radiation through matter without interaction
What is Transmission
Most important molecule in the body
What is DNA
What does TLD stand for?
What is Thermoluminescent Dosimeter
Ionization produced in air is measured by _______?
What is Exposure or Air Kerma
The lead apron has a lead equivalence of_____?
What is 0.50 mm Pb
X-ray beam after it has been attenuated by the patient?
What is Remnant Beam
This type of effect is based on probability or chance
What is Stochastic Effect or Probabilistic Effect
How often are personal dosimeters read?
What is Quarterly
This radiation measurement is used to quantify the risk of long-term radiation injuries _______.
What is Effective Dose
Correct collimation can increase image quality due to the decrease in____?
What is Scatter Radiation
Total absorption of incident x-ray photon?
What is Photoelectric Interaction
At what trimester is cell division the most rapid and most sensitive to radiation?
What is First Trimester
Primary barriers block the ____?
What is Direct Beam
Equivalent Dose is calculated as _____?
(hint: equation form)
What is Dose x Radiation weighting factor (Wr)
Low energy photons are removed by?
What is Filtration
The only photon-tissue interaction that does not result in ionization?
What is Coherent Scatter
What term refers to the period between conception and birth?
What is GESTATION
NCRP recommended annual dose limit for skin and extremities for radiation worker?
What is 500 mSv
According to NCRP Report #116, what is the annual effective dose limit for the general public, assuming frequent exposure?
What is 1.0 mSv
Most common filtration material?
What is Aluminum
Highest contribution to occupational exposure during radiographic procedure?
What is Compton Scatter
The most radiosensitive cells are___?
What is Erythroblasts
Amount of time the beam is on and directed at a particular barrier
What is Use Factor