Exam 4 Flashcards
Background radiation from natural environment includes all of the following: (3)
- Terrestrial
- Internal radioactive elements
- Cosmic
Personnel are required to be monitored if expected to receive ________ of the effective dose equivalent.
> 10%
Collimation increasing the field size in turn affects the exposed area by:
Increasing dose
Avoiding exposure to radiation that does not have a direct benefit regardless of the dose is ________.
ALARA
Pilots have an increased exposure to radiation.
True
The basic protective measures in radiation safety are all of the following except:
dose
Collimation of a larger field size causes scatter to _____________.
increase
Main source is Potassium-40 is a main source of internal radioactive elements. T/F
True
How often must protective apparel be inspected for quality?
Annually
The general rule for students in an radiologic education program is that the students must be 18 or older to enter the program due to exposure limits.
True
Pregnancy may be declared verbally. T/F
False
Which anatomic site has the lowest percentage of active bone marrow in adults?
sternum
Kilovot Peak (kVp) is the exposure factor in diagnostic x-ray that controls ____________.
beam quality
Patient considerations regarding patient dose management include all of the following except:
tissue type
The annual occupational effective dose limit for the skin, hands and feet is ___________________.
500 mSv
The Occupational Radiation Monitor for extremity monitoring must be worn at ____________________.
Fingers (ring)
mAs is the exposure factor in diagnostic x-ray that determines ____________.
beam quantity
The Occupational Radiation Monitor for personnel whole body must be worn at ____________________.
collar
The annual public infrequent exposure limit is ___________________.
5 mSv
The annual public exposure limit for lens of eye is ___________________.
15 mSv
The total exposure limit for the embryo/fetus is ___________________.
5 mSv
Shielding to reduce radiation exposure
include (3)
-protective barriers
-lead aprons
-thyroid shields
The Occupational Radiation Monitor
for fetal monitoring must be worn at
____________________.
waist
T or F: mAs controls dose more than
kVp
True
