Personnel Protection
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| What is the occupational dose limit per yr? | 50 mSv / 5 Rem
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| What is the non0occupational dose limit? | 5 mSv / 0.5 Rem
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| What type of procedures increase the radiographer's risk of exposure? | fluoro, iv procedures, mobile
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| This should be perpendicular to the line of travel of the primary beam. | primary barrier
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| These are examples of what: chest wall in an R & F room, door, floor, lateral walls | primary barrier
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| This provides protection for secondary radiation only and is located parallel to the direction of the primary beam | secondary barrier
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| These are examples of what kind of barrier: control booth, any wall in a CT room | secondary barrier
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| Which type of barrier must be: 1/16 " Pb eq and 7 ft high | primary
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| What type of barrier must be: 1/32" Pb eq? | Secondary barrier
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| What is another feature of secondary barrier, besides the 1/32" Pb eqv? | It must overlap the primary barrier by at least 1/2"
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| What is the require for windows as barriers? | must be 1.5 mm Pb eq thickness
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| How many times must radiation scatter before entering the control booth? | two times
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| What is the maximum allowable leakage from the tube housing? | 100 mR / hr at a distance of 1 meter
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| What protection requirements should the drape offer? | 0.25 mm lead eqv for a 45cm x 45cm area
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| What type of exposure cord should be short enough so that the exposure can be operated only when the radiographer is completely behind the control booth? | fixed
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| What type of exposure cord should be long e nough to allow the radiographer to stand at least 2 meters (6ft) from the x-ray tube? | mobile
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| MPD for the technologist is? | 50 mSv (5Rem) / yr
100 mRem / wk
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| WHat is the min thickness of the lead aprons? What is most commonly used? | 0.25 mm
0.50
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| THe most commonly used thickness for lead aprons, provides what percentage attenuation? | 88% @ 75 kV
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| Min thickness of lead gloves? | 0.25 mm
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| Min thickness of neck & thyroid shield? | 0.50 mm
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| What is the min thickness for protective eyeware? | 0.35 mm
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| Where should the radiographer stand to the scattering object? | at right angles
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| What is the intensity of scatter radiation 1 meter from the pt? | 0.1 % of the intensity of the useful beam at the pt
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| During which portion of pregnancy could resorption of the embryo happen? | first 2 wks
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| During which portion of pregnancy could major organogenesis-organ deformities-mainly skeletal happen? | from 2nd - 8th wk
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| During which part of pregnancy could the radiation cause leukemia or cancer? | first trimester
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| What stage of pregnancy is the most radiosensitive? | first trimester
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| What stage of pregnancy is the most resistant stage? | third trimester
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| What percentage increase in congenital abnormality is est to follow a 10 rad exposure? | 1%
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| Fetal exposure should be kept at what during the entire gestation period? | 500 mRem ( 5 mSv)
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| For a declared pregnant worker, exposure should not exceed? | 50 mRem / mth
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