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RADIOLOGY
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where is the danger?
just because it cannot be seen heard or felt doesnt mean your not getting exposed
radiation dangers
passes through with no effect
cell damage-can be repairable or not repairable
kills the cells
what part of the body is of most concern because of rapidly dividing cells?
blood system
bone marrow
reproductive system
hair follicles
what are the hazards of ionizing radiation?
somatic damage-cell damage
genetic damage-more of a concern
somatic cell damage
cancer
cataracts
aplastic anemia-bone marrow shuts down
sterility-reproductive system
genetic damage
gene mutation
not detected until 2nd and 3rd generation
birth defects
what does MPD stand for?
maximum permissible does
what should you never be in?
the primary beam
with____ _______. you should never have any problems
proper precaution
what is REM
then unit to measure exposure-should not exceed 5 REM per year
______ per year for occupationally exposed persons over the age of 18 years
A. .05 SV
B. 5 SV
C. 0.5 SV
D. .005 SV
A. .05 SV
dosimeter
a device that measures the amount of radiation a person has been exposed to
types of dosimeter
film badge
thermoluminescent dosimeters (TLD)
ion chamber
what type of dosimeter do we use?
film badge
film badge
contains a piece of film inside a lightproof envelope
light makes film black
the darker it is the more exposure you've been through
what is the advantage of the film badge
pretty accurate
not expensive
what is the disadvantage of the film badge
sensitive to enviromental things like light and heat
can get falsely high reading
thermoluminescent dosimeter (TLD)
contains lithium fluoride crystals
fancy crystals that heats up to see how much you've been exposed to
what is the advantage of TLD
keeps data over years
very accurate
what is the disadvantage of TLD
expensive
ion chambers
gives off ionizations that shows exposures
some are pens that you can put in your pocket
what are the personnel exposure
primary beam
secondary radiation
leakage rediation
what is secondary radiation
scatter radiation
primary source of exposure for us
when it hits an objects and bounces
leakage radiation
problem with the machine
can't tell if there is a leak
it is required to check it every 5 years
what can you use to reduce the exposure
chemical restraint
restraint devices
lead PPE
stand upright and arms length
use collimation
reduce the number of retakes
safety operating procedures
adequate technique chart
positioning devices
protective clothing
personal dosimetery devices
emergency procedures
quality control measures and test
radio opaque
x-ray can't go thru it
led or metal are examples
comes up white
radio loosent
x-ray can go thru it
comes up black
example air
what color will tissue come up
gray
Author
vanessasoto
ID
223641
Card Set
RADIOLOGY
Description
packet 3 for 1st test
Updated
6/13/2013, 12:42:47 AM
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