Examen
Radiation Protection Questions and Answers
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Radiation Protection Questions and Answers
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1-136 of 136Test to verify accuracy of exposure timer.
also evaluates AEC
Acceptable variation 5% > 10ms
Acceptable variation 20% > 10ms
2 tools used to measure:
1. Spinning top test
2. Exposure timer accuracy tool
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Exposure Timer Accuracy Test
Exposure Indicator range
number represents the amount of radiation to the IR
also indicates whether the patient was overexposed.
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CR and DR
1. Assign responsibility
2. Delineate scope of care.
3. Identify aspects of care.
4. Identify outcomes affecting the aspects of care.
5. Establish limits of the scope of assessment.
6. Collect and organize data
7. Evaluate care when outcomes are reached.
8. Take action to improve care.
9. Assess and document actions.
10. Communicate information to organization wide QA programs.
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JCAHO 10-step QA Program
,Effective Dose Limits for radiation workers and the population as a whole.
for the protection of radiation workers and the population as a whole, EfD limits have
been established as guidelines.
The annual upper boundary limits are designed to limit the stochastic (probabilistic)
effects of radiation
the annual upper boundary limits take into account the EqD in all radiation-sensitive
organs found in the body.
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Occupational and Nonoccupational Dose limits
Secondary barrier
xray tube is lead lined to protect the patient and the technologist.
Leakage radiation limit for xray tube is less than 100mR/hour at 1 meter from tube
housing
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X-ray Tube Housing
The roentgen (R) is a measure of radiation intensity of X-rays or gamma rays.
Roentgen = the radiation intensity required to produce an ionization charge of
0.000258 coulombs per kilogram of air.
, 1 R = 2.58 x 10^-4 c/kg
the roentgen is used for calibration of X-ray machines.
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Intensity of Radiation
X-ray and gamma ray photons and electrons (every energy) = 1
Pg.6 on PP
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Radiation Weighting Factors (Wr)
The degree to which the diagnostic study accurately rev leas the presence or
absence of disease in the patient.
provides a basis for determining whether an imaging study is justified.
Ordering doctor, radiologist and RT share in keeping patient medical radiation
exposure at ht lowest level possible.
risk outweighs the benefit.
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Diagnostic Efficacy
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