Shielding and Protection Flashcards
Minimum filtration for fixed equipment operating above 70 kVp
2.5 mm Al equivalent
Minimum filtration for fixed equipment operating 50 to 70 kVp
1.5 mm Al equivalent
Minimum filtration for mobile units
2.5 mm Al equivalent
At least how many cm below the collimators should the patient be for skin sparing?
15 cm
What is the source-to-skin distance for fixed, portables, and c-arm?
At least 12 in
What is the source-to-skin distance for fluoro (fixed)
At least 15 in
Primary barrier requirements….
1/16 in lead extending 7 ft upward from the floor
Secondary barrier requirements…..
1/32 in lead overlapping primary by 1/2 in up to ceiling
Control booth requirements……
1/16 in extend 7 ft upward from floor
1 mSv (100 mrem) per week
Control booth window requirements….
1.5 mm lead equivalent
Clear lead plastic barrier requirements……
.3 to 2 mm lead equivalent (secondary)
Clear lead plastic overhead requirements…
.5 mm lead equivalent
Door requirements….
1/32 in of lead equivalent
Lead apron requirements….
100 kVp peak energy - 0.25 mm lead thickness
0.5 or 1 mm lead equivalent offers more protection
What is the minimum lead apron requirement during fluoro and c-arm?
0.5 mm
