RTBC - Primary exposure factors- Questions & Answers

RTBC - Primary exposure factors- Questions
& Answers

Which prime exposure factor controls the energy of the x-ray beam? ✔️Correct Ans-kVp



Which of the following statements describes the relationship between kVp and x-ray energy
✔️Correct Ans-Maxximum x-ray energy is numerically equal to the kVp




kVp Influences which three characteristics of the x-ray beam ✔️Correct Ans-- quantity

- Quality

- Penetrability



An x-ray exposure is made using 320mA, 0.2s, 96kVp, and SID of 60 inches. What is the
maximum energy of the x-ray photons in the beam? ✔️Correct Ans-96 keV




Which statement describes the relationship between kVp and the beam intensity ✔️Correct Ans-
Beam intensity is directly proportional to the square of the kVp



A radiograph acquired at 60kVp results in an underexposed image. What new kVp setting will
double the receptor exposure? ✔️Correct Ans-69kVp



Radiograph acquired at 100kVp results in an underexposed image. What new kVp setting will
double the receptor exposure? ✔️Correct Ans-115kVp

, When, using a fixed technique, an increase in kVp will cause patient dose to ✔️Correct Ans-
Increase



When using a fixed technique, a decrease in kilovoltage peak will cause patient dose two
✔️Correct Ans-Decrease




SID is defined as the distance from ✔️Correct Ans-Anode focal spot to the IR




What characteristic of the x-ray beam is influenced by changes to the SID ✔️Correct Ans-
Intensity



When the distance from the x-ray source increases, the beam intensity will ✔️Correct Ans-
Decrease



When the distance from the x-ray source decreases, the beam intensity will ✔️Correct Ans-
Increase



When the distance from the x-ray source decreases the patient dose will ✔️Correct Ans-Increase




When the distance from the x-ray source increases, the patient dose will ✔️Correct Ans-Decrease