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. .005 SV
D. 0.5 SV

A. .05 SV
(this multiple choice question has been scrambled)
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
Updated:	2013-06-13 00:42:47
Tags:	packet radiation safety
Folders:
Description:	packet 3 for 1st test
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