Early Effects
Loss of hair.
What is epilation?
Below this point or level, no effects are apparent.
What is a threshold?
Annual occupational effective dose limit.
What is 50mSv or 5rem?
Regular measurement and evaluation of radiographic equipment components and their performance.
What is quality control?
Source to skin distance for fixed fluoroscopic equipment.
What is 15 inches?
The first stage of acute radiation sickness.
What is the initial or prodromal stage?
Randomly occuring, dose independent, based on chance of occurence rather than severity.
What are stochastic effects?
Occupational cumulative effective dose.
What is 10mSv x age or 1rem x age?
Radiation not created at the target of the anode.
What is off-focus radiation?
Primary barrier thickness.
What is 1/16th of an inch?
Lethal dose in humans with medical intervention.
What is LD 50/60?
Cataracts.
What are late deterministic effects?
Maximum permissible dose (MPD) system was replaced by this system.
What is effective dose limiting system?
With an increase in ________, average beam energy increases and beam intensity decreases.
What is filtration?
Recommended lead thickness for thyroid shield.
What is .5mm Pb?
Symptoms become apparent in this stage of ARS.
What is manifest illness?
Damage to reproductive cells in humans that are caused by irradiation of sperm and ova before conception.
What is mutagenesis?
Embryo-fetus equivalent dose limit in a month.
What is .5mSv or .05rem?
General fluoroscopic exposure rate.
What is 10 R/min?
Radiation output weighted time during the week that the x-ray unit is delivering radiation.
What is workload?
Occurs between 6-10 Gy.
What is gastrointestinal syndrome?
Type of dose relationship recommended by BEIR in 1990.
What is linear, nonthreshold?
Public equivalent dose for lens of the eyes.
What is 15mSv or 1.5rem?
Leakage radiation limit.
What is 100mR/ hour @ 1 meter?
Level of intensity of scatter at a 90 degree angle to the primary beam.
What is 1/1000?