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37 Cards in this Set
- Front
- Back
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The recommended dose limit for occupational worker in Sv, mSv, rem, and mrem/year is |
.05Sv 50mSv 5rem 5000mrem |
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Annual Dose limit for occupational worker in Sv /year |
.05Sv/year |
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Annual Occupational dose limit for occupational worker in rem is |
5rem/year |
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Annual recommended dose limit for occupational worker in mSv is |
50mSv/year |
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Annual recommended dose limit for occupational worker in mrem is |
5000mrem/year |
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The highest occupational exposure of diagnostic x-ray personnel occurs during _________ and _________ |
Fluoroscopy and mobile radiography |
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During flouro and mobile radiography the technician should wear |
A protective apron |
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Therapists typically recieve the most occupational exposures from ___ _________, not __________. Why? |
CT Simulation Flouro On the occasion a therapist performs flouro they are not in the vault with the patient |
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ALARA |
As Low As Resonably Achievable |
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Cardinal Rule |
Time Distance Shielding |
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Time (________________) |
Reduce time of exposure |
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Distance (______________) |
Increase distance from source |
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Shielding (________________) |
Use appropriate shielding when applicable |
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Exposure = ______ _____ x ______ |
Exposure rate x time |
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Personnel engaged in ___________ ___________ that often recieve higher exposure because of longer fluoroscopic x-ray beam on time |
Interventional radiology (IR) also known as vascular and Interventional |
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What type of monitoring must be provided for interventional radiologist |
Extremity monitoring |
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Personnel in ______ facilities are low compared to fluoroscopy |
CT |
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CT exposure levels to staff are lower than that of flouro because |
The beam is finely collimated and only secondary radiation is present in exam room |
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1 Roentgen = ___________Sv |
.00877 |
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Surgery suits often use _______ as part of their O.R. equipment that provide ________ and ________ imagery |
C-arms Flouroscopy X-ray imagery |
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Surgeons, nurses, and other O.R. staff typically wear _____ _____ and use _____ to protect them from exposure |
Lead aprons Shields |
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Most occupational exposures are ____ ________ and do not warrant these workers to wear ______ ______ |
Very minimal Radiation monitors |
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Most occupational exposures are ____ ________ and do not warrant these workers to wear ______ ______ |
Very minimal Radiation monitors |
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It should _____ be necessary for radiologic personnel to exceed ______mSv/year (_____mrem/year) |
NEVER 50mSv/year 5000mrem/year |
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In smaller hospitals, emergency centers, and private clinics, occupational exposures rarely exceed ______mSv/year |
5mSv/year |
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Used historically to imply dose of radiation that would be expected to produce NO significant radiation effects |
Maximum permissible dose (MPD) |
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MPD suggested that if the dose was less than or equal to the given dose, the patient would |
Not experience ANY side effects |
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MPD suggested that if the dose was less than or equal to the given dose, the patient would |
Not experience ANY side effects |
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We now know MPD is not true, thus it has been replaced with the |
Dose limit method |
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We now know MPD is not true, thus it has been replaced with the |
Dose limit method |
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Dose limits only refer to ______ ______, not ______. |
Radiation workers Patients |
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Dose limits only refer to ______ ______, not ______. |
Radiation workers Patients |
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There is no patient dose other than ___ _________ dose |
Non-occupational |
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First dose limit established was in ____ |
1902 |
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First dose limit was ____mSv/___ Now dose limit is ____mSv/____ |
500mSv/week 50mSv/year |
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The cumulative dose tolerance for occupational workers equation is |
Cumulative = 10 mSv X age or 1000mrem X age |
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Referring to microsieverts per day (uSv/day) 10^5= U= ___Sv/day ___mSv/day X 5 days = ___mSv/week |
10^5= 100,000uSv U=-6 .1 Sv/day = 100mSv/day X 5 days = 500mSv/week |
