principles of radiation protection Flashcards
when were xrays discovered
1895
what are the two types of tools that xrays can be considered
diagnostic and therapeutic
what is the purpose of radiation protection
to prevent the injury to human tissue that ionizing radiation can cause
reduces potential harmful biological effects
what are the four main ASPECTS of radiation safety
- pt not sub to unnec
- pt must be protected
- personnel must be protected
- public in vicinity must be protected
how can pt not be subjected to excessive radiation
follow procedure
ALARA
how are the public/vicinoty protected from xrays
- lead lined rooms
- closed doors
- conscious of portables
what are the cardinal principles of radiation safety
- time
- distance
- shielding
how to use time to reduce dose to pt
less on time in fluoro
reduce repeats
how to use time to reduce dose in personnel
less fluoro
less time in room
no one staff as immobil
how to use shielding to reduce personnel dose
sield appropriately
lead walls by control panel
what unit is used to measure exposure (2)
C/kg or mR
what unit is used to measure effective dose
mSv
what unit is used to measure absorbed dose
mGy
what is the ICRP
international commission of radiation protection
international body
what is the BEIR
academy/council… on the biological effects of ionizing radiation
mosty american national
what document is from health canada
the SC35
what is the MOH
ministry of health
provincial
what document did the MOH produce
HARP
what is the MOL
ministry of labour
provincial
wat document did the MOL produce
occupational health and safety act
what is the occupational dose limit for whole body
20mSv/yr over 5
max 50 mSv in one year
what is the occupational dose limit for the lens of the eye
20 mSv/yr, over 5 yrs
max of 50 in one year
what is the occupational dose limit for the skin
500 mSv equivalent dose
what is the occupational dose limit for the hands and feet
500mSv equivalent dose
