RTBC - RADIATION PROTECTION EXAM QUESTIONS AND ANSWERS 100% CORRECT
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RTBC - RADIATION PROTECTION
Institution
RTBC - RADIATION PROTECTION
RTBC - RADIATION PROTECTION EXAM QUESTIONS AND ANSWERS 100% CORRECTRTBC - RADIATION PROTECTION EXAM QUESTIONS AND ANSWERS 100% CORRECTRTBC - RADIATION PROTECTION EXAM QUESTIONS AND ANSWERS 100% CORRECT
The primary purpose of the ALARA principal and diagnostic imaging is to - ANSWER-Reduce radiatio...
RTBC - RADIATION PROTECTION EXAM
QUESTIONS AND ANSWERS 100%
CORRECT
The primary purpose of the ALARA principal and diagnostic imaging is to - ANSWER-
Reduce radiation does to occupational workers
A radiation worker receive the radiation dose of 5 mGy while participating in a
fluoroscopy procedure for 10 minutes. What radiation dose would have been received
by the worker if they reduce their time in the radiation field to only five minute? -
ANSWER-2.5 mGy
Which cardinal rule of radiation protection is mathematically defined by the inverse
square law - ANSWER-Distance
In order to reduce a Technologist occupational dose during a portable radiograph of the
chest, the technologist should - ANSWER-Stand several feet away from the patient
during the exposure
During a surgical procedure, using three minutes of fluoroscopy time, a radiographer
receives an effective dose of 1 mSv. What effective those would be experienced by the
radiographer, if the fluoroscopy time is doubled? - ANSWER-2 mSv
A radiographer is exposed to a dose rate of 10 mSv per hour, while standing 3 feet from
the patient during see arm procedures. What is the approximate dose rate if the
radiographer stands for feet from the patient? - ANSWER-5.6 mSv/hr
A radiologist receives an equivalent dose of 100 microsieverts while standing 25 cm
from a patient during a fluoroscopy procedure. Estimate the equivalent dose if the
radiologist and 10 cm from the patient. - ANSWER-625 microsieverts
Which three of the following properties of lead make it a valuable material for radiation
shielding devices? - ANSWER-- High atomic number
- High mass density
- High attenuation
Which of the following materials requires the smallest half value layer (HVL) to
effectively attenuate the x-ray beam? - ANSWER-Lead
How does radiation dose change if a Technologist increases their distance from
radiation source by a factor of 2? - ANSWER-Dose decreases by a factor of two
squared
, A half value layer (HVL) is the thickness of material required to reduce which of the
following by half? - ANSWER-X-ray beam intensity
Is shielding device constructed with a sickness equivalent to 1 HVL will reduce the
quantity of radiation to - ANSWER-50% of the original quantity
Is shielding device constructed with a sickness equivalent to two have value layers will
reduce the quantity of radiation to - ANSWER-25% of the original quantity
If they have value layer of shielding material is equal to 2mm, how much radiation will
transmit through 6 mm of this material? - ANSWER-12.5% of the original quantity
What is the most commonly used shielding material in medical imaging? - ANSWER-
Lead
What led thickness equivalence is required for protective lead aprons designated for
general radiography, surgery, and fluoroscopy? - ANSWER-0.50 mm lead (Pb)
Do use of leaded glasses is recommended for occupational use in medical imaging in
order to prevent which of the following conditions - ANSWER-Radiation induced
cataracts
What lead thickness equivalence is required for protective glasses? - ANSWER-0.35
mm lead (Pb)
What lead thickness equivalence is required for protective lead gloves? - ANSWER-
0.25 mm lead (Pb)
What lead thickness equivalence is required for the Bucky slot cover every fluoroscopy
system - ANSWER-0.25 mm lead (Pb)
What term describes the process of restricting the size of the exposure field to the area
being imaged? - ANSWER-Collimating
The collimated boundaries of the exposure field should always be equal in size to the -
ANSWER-Anatomy of interest
Which two of the following are advantages of using correct collimation? - ANSWER--
decreased patient dose
- Increased image quality
Collimator leaves must be constructed of Haley attenuating materials such as -
ANSWER-Lead
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