RTBC - radiation protection Questions &
Answers
Which of the following is a form of an added filtration commonly included in the x-ray tube
assembly ✔️Correct Ans-Aluminum plates
Which three of the following are included in the total filtration of the x-ray beam? ✔️Correct
Ans-- insulating oil
- Glass envelope
- Aluminum plates
What units are used to measure the total filtration of the x-ray beam? ✔️Correct Ans-Millimeters
(mm) aluminum equivalence (Al eq.)
The thickness of inherent filtration within general use x-ray tube assemblies is equal to
approximately ✔️Correct Ans-0.5 mm aluminum equivalence.
The thickness of added filtration within general use x-ray tube assemblies is equal to
approximately ✔️Correct Ans-2 mm aluminum equivalence
What is the minimum total filtration equivalence recommended by the national Council on
radiation protection and measurements (NCRP) in report 1024 x-ray machines operating above
70 kVp? ✔️Correct Ans-2.5 mm aluminum equivalence.
, What term describes the thickness of a material that reduces the x-ray beam quantity by half
✔️Correct Ans-Half value layer
How is the x-ray beam changed by the addition of 1 half value layer of aluminum ✔️Correct Ans-
50% decrease in quantity
Which of the following beam energies requires the thickest half value layer ✔️Correct Ans-110
kVp
What is the intensity of an x-ray beam created with one 2 value layer of filtration if the unfiltered
intensity is 100 mGy? ✔️Correct Ans-50 mGy
What term describes the thickness of a material that reduces the x-ray beam quantity by half?
✔️Correct Ans-Half value layer
How is the x-ray beam changed by the addition of 1 half value layer ✔️Correct Ans-50% decrease
in quantity
What is the intensity of an x-ray beam created with one HVL filtration if the unfiltered intensity
is 50 mGy? ✔️Correct Ans-25 mGy
The intensity of an x-ray beam created with one HVL of filtration resulted in an intensity of 75
mGy. What is the expected intensity of the beam of the filtration is removed ✔️Correct Ans-150
mGy
Answers
Which of the following is a form of an added filtration commonly included in the x-ray tube
assembly ✔️Correct Ans-Aluminum plates
Which three of the following are included in the total filtration of the x-ray beam? ✔️Correct
Ans-- insulating oil
- Glass envelope
- Aluminum plates
What units are used to measure the total filtration of the x-ray beam? ✔️Correct Ans-Millimeters
(mm) aluminum equivalence (Al eq.)
The thickness of inherent filtration within general use x-ray tube assemblies is equal to
approximately ✔️Correct Ans-0.5 mm aluminum equivalence.
The thickness of added filtration within general use x-ray tube assemblies is equal to
approximately ✔️Correct Ans-2 mm aluminum equivalence
What is the minimum total filtration equivalence recommended by the national Council on
radiation protection and measurements (NCRP) in report 1024 x-ray machines operating above
70 kVp? ✔️Correct Ans-2.5 mm aluminum equivalence.
, What term describes the thickness of a material that reduces the x-ray beam quantity by half
✔️Correct Ans-Half value layer
How is the x-ray beam changed by the addition of 1 half value layer of aluminum ✔️Correct Ans-
50% decrease in quantity
Which of the following beam energies requires the thickest half value layer ✔️Correct Ans-110
kVp
What is the intensity of an x-ray beam created with one 2 value layer of filtration if the unfiltered
intensity is 100 mGy? ✔️Correct Ans-50 mGy
What term describes the thickness of a material that reduces the x-ray beam quantity by half?
✔️Correct Ans-Half value layer
How is the x-ray beam changed by the addition of 1 half value layer ✔️Correct Ans-50% decrease
in quantity
What is the intensity of an x-ray beam created with one HVL filtration if the unfiltered intensity
is 50 mGy? ✔️Correct Ans-25 mGy
The intensity of an x-ray beam created with one HVL of filtration resulted in an intensity of 75
mGy. What is the expected intensity of the beam of the filtration is removed ✔️Correct Ans-150
mGy
