Regulations Flashcards
What is the minimum source-to-skin-distance (SSD) for mobile studies?
12”
What is the minimum source-to-skin-distance (SSD) for mobile fluoro studies (i.e. with the C-Arm?)
12” (image intensifier as close to pt as possible so tube is furthest away.)
What is the minimum source-to-skin-distance (SSD) for fixed fluoro studies?
15”
What are the minimum requirements for a primary protective barrier in millimeters and inches? How tall should it be?
1.6 mm Pb (same as) 1/16” (Pb = lead), 7 feet tall / 2.1 meters
What are the minimum requirements for a secondary protective barrier?
0.8 mm Pb (same as) 1/32” (Pb = lead)
What is the minimum lead equivalency for lead aprons according to government agency?
0.25 mm Pb
What is the minimum lead equivalency for lead gloves?
0.25 mm Pb
What is the minimum lead equivalency for thyroid shields?
0.5 mm Pb
What is the minimum lead equivalency for protective eyeglasses?
0.35 mm Pb
What is the minimum lead equivalency for protective drape?
0.25 mm Pb
What is the minimum lead equivalency for bucky slot shielding device?
0.25 mm Pb
What is the lead equivalency of a maternity protective apron?
1 mm Pb
What is the allowable radiation leakage for an x-ray tube per hour?
100 mR / hr, 1 meter from source (milliroentgen)
What is the max exposure rate for fluoro
10 R / minute
What is the minimum lead equivalency for lead aprons according to NCRP (National Council on Radiation Protection and Measurements)?
0.5 mm Pb
