ARRT Test Prep, Limited X-Ray Core
Questions and Answers | Latest
Version | 2025/2026 | Correct & Verified
What happens to patient dose if SID is decreased?
✔✔Patient dose increases due to higher intensity at a shorter distance
Why is a radiographic grid necessary for imaging thick body parts?
✔✔To reduce scattered radiation that degrades image contrast
Which imaging factor should be adjusted to reduce magnification of an object?
✔✔Increase SID or decrease OID
What is the main safety concern for pregnant patients during X-ray imaging?
✔✔Fetal radiation exposure
Which artifact results from improper alignment of a grid?
✔✔Grid cutoff
1
,Why is proper collimation important for pediatric patients?
✔✔To minimize radiation exposure and limit dose to sensitive tissues
What is the relationship between kVp and X-ray beam penetration?
✔✔Higher kVp increases beam penetration through tissues
Which factor primarily controls the quantity of X-ray photons produced?
✔✔mAs
Why should patients remove metal objects before X-ray imaging?
✔✔To prevent artifacts that obscure anatomy
Which X-ray interaction primarily forms the image in soft tissue imaging?
✔✔Photoelectric effect
What happens if the anode angle is too steep for a given field size?
✔✔Increased heel effect with uneven exposure across the image
2
,Which type of distortion occurs when the part is angled incorrectly relative to the CR?
✔✔Shape distortion
What is the effect of increasing SID while keeping other factors constant?
✔✔Decreases magnification and improves image sharpness
What does the term “attenuation” refer to in X-ray imaging?
✔✔The reduction in X-ray beam intensity as it passes through tissue
What is the primary function of the anode in an X-ray tube?
✔✔To serve as the target for electrons to produce X-rays
Which imaging principle explains why bone appears white on an X-ray?
✔✔Photoelectric effect
What is the main advantage of a small focal spot?
✔✔Improved spatial resolution and sharper image detail
3
, Why is a grid used in radiography?
✔✔To absorb scattered radiation and improve image contrast
What is the main purpose of filtration in an X-ray tube?
✔✔To remove low-energy X-rays that would increase patient dose without improving image
quality
Which factor directly affects patient dose and image density but not contrast?
✔✔mAs
What happens to radiographic contrast when kVp is increased without changing mAs?
✔✔Contrast decreases, producing a more gray-scale image
Why is patient positioning critical in radiography?
✔✔To accurately demonstrate anatomy and reduce distortion
What type of artifact is caused by patient motion during exposure?
✔✔Motion blur
4
Questions and Answers | Latest
Version | 2025/2026 | Correct & Verified
What happens to patient dose if SID is decreased?
✔✔Patient dose increases due to higher intensity at a shorter distance
Why is a radiographic grid necessary for imaging thick body parts?
✔✔To reduce scattered radiation that degrades image contrast
Which imaging factor should be adjusted to reduce magnification of an object?
✔✔Increase SID or decrease OID
What is the main safety concern for pregnant patients during X-ray imaging?
✔✔Fetal radiation exposure
Which artifact results from improper alignment of a grid?
✔✔Grid cutoff
1
,Why is proper collimation important for pediatric patients?
✔✔To minimize radiation exposure and limit dose to sensitive tissues
What is the relationship between kVp and X-ray beam penetration?
✔✔Higher kVp increases beam penetration through tissues
Which factor primarily controls the quantity of X-ray photons produced?
✔✔mAs
Why should patients remove metal objects before X-ray imaging?
✔✔To prevent artifacts that obscure anatomy
Which X-ray interaction primarily forms the image in soft tissue imaging?
✔✔Photoelectric effect
What happens if the anode angle is too steep for a given field size?
✔✔Increased heel effect with uneven exposure across the image
2
,Which type of distortion occurs when the part is angled incorrectly relative to the CR?
✔✔Shape distortion
What is the effect of increasing SID while keeping other factors constant?
✔✔Decreases magnification and improves image sharpness
What does the term “attenuation” refer to in X-ray imaging?
✔✔The reduction in X-ray beam intensity as it passes through tissue
What is the primary function of the anode in an X-ray tube?
✔✔To serve as the target for electrons to produce X-rays
Which imaging principle explains why bone appears white on an X-ray?
✔✔Photoelectric effect
What is the main advantage of a small focal spot?
✔✔Improved spatial resolution and sharper image detail
3
, Why is a grid used in radiography?
✔✔To absorb scattered radiation and improve image contrast
What is the main purpose of filtration in an X-ray tube?
✔✔To remove low-energy X-rays that would increase patient dose without improving image
quality
Which factor directly affects patient dose and image density but not contrast?
✔✔mAs
What happens to radiographic contrast when kVp is increased without changing mAs?
✔✔Contrast decreases, producing a more gray-scale image
Why is patient positioning critical in radiography?
✔✔To accurately demonstrate anatomy and reduce distortion
What type of artifact is caused by patient motion during exposure?
✔✔Motion blur
4
