Exam (elaborations)
Radiation Protection of Patients and Personnel (nena-s)
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Radiation Protection of Patients and Personnel (nena-s)
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1-162 of 162Determine the cumulative effective dose (CumEfD) to the whole body of an
occupationally exposed person who is 34 years old:
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340 mSv
,Which type of gonadal shielding could be used for a patient having an exam requiring
a sterile field?
- lead sheet
- lead apron
- shadow shield
- contact shield
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shadow shield
What is the purpose of radiographic beam filtration?
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to increase beam hardness, thereby reducing patient skin dose and the
dose to superficial tissue
Which of the following describes a primary protective barrier?
1. lead apron
2. a barrier to absorb scattered radiation
3. a barrier to absorb the useful beam
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3 only
Special gonadal shields should be employed any time the gonads are
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within 5 cm of the primary beam
For C-arm devices with similar fields of view, the dose rate to personnel located within
a meter of the patient is
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comparable to that of routine flouro
A fetus is most vulnerable to radiation during which of the following time periods?
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1st trimester
Why is pt dose so critical in mammo?
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the high radiosensitivity of the breast tissue
Whenever scattered radiation decreases, the radiographer's exposure:
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, Decreases
What is the major disadvantage of the shadow shield?
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cant be used during fluoro
If the peak energy of the x ray beam is 100 kVp a protective lead apron must be the
equivalent of which of the following measures?
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.25 mm thickness of lead
Off-focus or stem radiation is produced by which of the following?
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projectile e- striking the anode at locations other than the focal spot
Which of the following combinations of technical factors and filtration reduce patient
radiation dose during a examination?1
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