rad protection Flashcards
what are the two types of monitoring
personnel and area
why is personnel exposure monitored?
to be kept well below the annual effective dose (EfD)
what are radiation survey instruments
area monitoring devices that detect and measure radiation
when is personnel monitored required
when radiation workers are likely to receive 10% or more of the annual occupational EfD limit
what is the annual occupational EfD limit
50mSv (5rem) in a single year
Most healthcare facilities issue dosimeters when personnel could receive what dose and percent?
1% or 0.04 mSv (4 rem)
what is the monitoring of radiation exposure to any person occupationally exposed on a regular basis to ionizing radiation is recommended
personnel dosimetry
why is the dosimeter worn at the collar
to get maximum dose to the thyroid, neck and head
unprotected head neck and lenses of the eyes receive how much more radiation than the protected trunk?
10-20x
commercial lead aprons typically have how much lead equivalent shield over all?
0.5mm lead equivalent
During Interventional fluoro where is the second dosimeter worn
worn beneath waist level to monitor dose to lower body trunk
what is the extremity doimeter called
Thermoluminescent dosimeter (TDL)
what info in contained on the TDL monitors?
act number, name, wear date, R or L hand, size and ref # of TDL ring
what are the types of personnel dosimeters
optically stimulated Luminescence (OSL), film badge, Thermoluminescent dosimeter, pocket ionization chambers
When were OSL developed
in late 1990s
