RTBC- Image Acquisition| Exam
Questions with Complete Answers
Which two of the following are affected by the half-value layer (HVL) of an x-ray tube?
- image quality
- occupational dose
- patient dose
Image quality and patient dose
A radiation worker received a radiation dose of 5 milligrays (mGy) while
participating in a fluoroscopy procedure for 10 minutes. What radiation dose would
have been received by the worker if they reduced their time in the radiation field to
only 5 minutes?
A) 1.25 mGy
B) 2.5 mGy
C) 5 mGy
D) 10 mGy
2.5 mGy
What term describes the expansion of the x-ray beam as it travels through space?
A) Divergent
B) Convergent
C) Polychromatic
D) Polyenergetic
Divergent
, What is the intensity of an x-ray beam created with one half-value layer (HVL)
of filtration if the unfiltered intensity is 100 microgray (μGy)?
A) 200 μGy
B) 150 μGy
C) 50 μGy
D) 25 μGy
E) 12.5 μGy
50 μGy
The thickness of inherent filtration within general use x-ray tube assemblies is equal
to approximately:
A) 0.5 mm aluminum equivalence (Al. eq)
B) 5 mm aluminum equivalence (Al. eq)
C) 0.5 mm lead equivalence (Al. eq)
D) 5 mm lead equivalence (Al. eq)
0.5 mm aluminum equivalence (Al. eq.)
If the half-value layer (HVL) of shielding material is equal to 2 mm, how
much radiation will transmit through 6 mm of this material?
A) 75% of the original quantity
B) 50% of the original quantity
C) 25% of the original quantity
D) 12.5% of the original quantity
12.5% of the original quantity
During a surgical procedure using three (3) minutes of fluoroscopy time, a
radiographer receives an effective dose of 1 millisievert (mSv). What effective dose
would be experienced by the radiographer if the fluoroscopy time is doubled?
Questions with Complete Answers
Which two of the following are affected by the half-value layer (HVL) of an x-ray tube?
- image quality
- occupational dose
- patient dose
Image quality and patient dose
A radiation worker received a radiation dose of 5 milligrays (mGy) while
participating in a fluoroscopy procedure for 10 minutes. What radiation dose would
have been received by the worker if they reduced their time in the radiation field to
only 5 minutes?
A) 1.25 mGy
B) 2.5 mGy
C) 5 mGy
D) 10 mGy
2.5 mGy
What term describes the expansion of the x-ray beam as it travels through space?
A) Divergent
B) Convergent
C) Polychromatic
D) Polyenergetic
Divergent
, What is the intensity of an x-ray beam created with one half-value layer (HVL)
of filtration if the unfiltered intensity is 100 microgray (μGy)?
A) 200 μGy
B) 150 μGy
C) 50 μGy
D) 25 μGy
E) 12.5 μGy
50 μGy
The thickness of inherent filtration within general use x-ray tube assemblies is equal
to approximately:
A) 0.5 mm aluminum equivalence (Al. eq)
B) 5 mm aluminum equivalence (Al. eq)
C) 0.5 mm lead equivalence (Al. eq)
D) 5 mm lead equivalence (Al. eq)
0.5 mm aluminum equivalence (Al. eq.)
If the half-value layer (HVL) of shielding material is equal to 2 mm, how
much radiation will transmit through 6 mm of this material?
A) 75% of the original quantity
B) 50% of the original quantity
C) 25% of the original quantity
D) 12.5% of the original quantity
12.5% of the original quantity
During a surgical procedure using three (3) minutes of fluoroscopy time, a
radiographer receives an effective dose of 1 millisievert (mSv). What effective dose
would be experienced by the radiographer if the fluoroscopy time is doubled?
