EXAM #4 (Ch. 38 Occupational Radiation Dose Management) Flashcards
Extremity monitoring must be provided for who?
Extremity monitoring must be provided for interventional radiologists.
DLs imply that if received annually, the risk of death would be less than what?
DLs imply that if received annually, the risk of death would be less than 1 in 10,000.
Current DLs are based on a _____, _____ dose-response relationship; they are considered to represent an _____ level of occupational radiation exposure.
Current DLs are based on a linear, nonthreshold dose-response relationship; they are considered to represent an acceptable level of occupational radiation exposure.
What is the equation for effective dose?
Effective dose (E) = Radiation weighting factor (Wr) × Tissue weighting factor (Wt) × Absorbed dose
The DL established for nonoccupationally exposed persons is __ of that established for the radiation worker.
The DL established for nonoccupationally exposed persons is 1/10 of that established for the radiation worker.
Each mobile x-ray unit should have a what assigned to it?
Each mobile x-ray unit should have a protective apron assigned to it.
The exposure cord on a portable x-ray unit must be at least __m long.
The exposure cord on a portable x-ray unit must be at least 2m long.
The useful beam should never be directed toward the what?
The useful beam should never be directed toward the operating console.
Occupational radiation monitoring is required when there is any likelihood that an individual will receive more than __ of the recommended dose limit.
Occupational radiation monitoring is required when there is any likelihood that an individual will receive more than 1/10 of the recommended dose limit.
The occupational radiation monitor offers what against radiation exposure?
The occupational radiation monitor offers no protection against radiation exposure!
Film badges must be worn with the appropriate side to the _____.
Film badges must be worn with the appropriate side to the front.
TLDs can be worn for intervals up to how long?
TLDs can be worn for intervals up to 1 year.
If the radiologic technologist participates in fluoroscopy, the occupational radiation monitor should be positioned where?
If the radiologic technologist participates in fluoroscopy, the occupational radiation monitor should be positioned on the collar above the protective apron.
The control monitor measures what?
The control monitor measures background exposure during transportation, handling, and storage.
What must be worn during fluoroscopy and mobile radiology?
Protective apparel must be worn during fluoroscopy and mobile radiology.
It is known that __mm lead equivalent protective aprons represent a workable compromise between unnecessary weight and desired protection.
It is known that 0.5mm lead equivalent protective aprons represent a workable compromise between unnecessary weight and desired protection.
Radiology staff should never hold what?
Radiology staff should never hold patients.
The pregnant radiologic technologist should be provided with what?
The pregnant radiologic technologist should be provided with a second personnel monitoring device.
The effective DL is __mSv/yr (__mrem/yr).
Environmental background radiation is approximately __mSv/yr (__mrem/yr).
The effective DL is 50 mSv/yr (5000 mrem/yr).
Environmental background radiation is approximately 1 mSv/yr (100 mrem/yr).