RTBC - RADIATION PROTECTION STUDY
GUIDE WITH ANSWERS
The primary purpose of the ALARA principal and diagnostic imaging is to
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?
2.5 mGy
Which cardinal rule of radiation protection is mathematically defined by the
inverse square law
Distance
In order to reduce a Technologist occupational dose during a portable
radiograph of the chest, the technologist should
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?
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?
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.
625 microsieverts
Which three of the following properties of lead make it a valuable material for
radiation shielding devices?
