ARRT Radiography (R) Exam With Actual
Questions & Verified Answers, Plus
Explained Rationales/Expert Verified For
Guaranteed 100% Pass 2026/Latest
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1. What is the primary purpose of filtration in an X-ray tube?
A. Increase beam intensity
B. Reduce patient dose by removing low-energy photons
C. Increase image contrast
D. Decrease scatter radiation
Answer: B. Reduce patient dose by removing low-energy photons
Rationale: Filtration removes low-energy photons that would be
absorbed by the patient without contributing to image formation,
thereby reducing skin dose.
2. Which interaction is most responsible for diagnostic image
formation?
A. Photoelectric effect
B. Pair production
C. Coherent scatter
D. Compton scatter
Answer: A. Photoelectric effect
Rationale: The photoelectric effect contributes to image contrast
because it involves complete absorption of the X-ray photon.
, 3. Increasing kVp primarily affects:
A. Image contrast
B. Patient positioning
C. Collimation
D. Filtration
Answer: A. Image contrast
Rationale: Higher kVp increases beam penetration and reduces
contrast by increasing scatter.
4. Which device limits the size and shape of the X-ray beam?
A. Grid
B. Filter
C. Collimator
D. Intensifying screen
Answer: C. Collimator
Rationale: Collimators restrict beam size, reducing patient dose and
scatter radiation.
5. What is the purpose of a grid in radiography?
A. Increase image brightness
B. Reduce scatter reaching the image receptor
C. Increase beam quality
D. Reduce patient motion
Answer: B. Reduce scatter reaching the image receptor
Rationale: Grids absorb scattered photons, improving image contrast.
, 6. Which factor increases patient dose the most?
A. Decreasing mAs
B. Increasing SID
C. Increasing mAs
D. Increasing filtration
Answer: C. Increasing mAs
Rationale: mAs directly controls the number of X-ray photons
produced, increasing dose proportionally.
7. The latent image in a digital receptor is:
A. Immediately visible
B. Stored as electrical charge
C. Stored as chemical fog
D. Created after processing only
Answer: B. Stored as electrical charge
Rationale: In digital systems, energy is stored as trapped electrons or
electronic signals until readout.
8. Which term describes the ability to distinguish between similar
tissues?
A. Density
B. Contrast resolution
C. Spatial resolution
D. Magnification
Answer: B. Contrast resolution
Rationale: Contrast resolution refers to the system’s ability to
differentiate subtle differences in tissue attenuation.
, 9. What is the inverse square law used to determine?
A. Exposure vs time
B. Beam intensity vs distance
C. Contrast vs kVp
D. Motion vs blur
Answer: B. Beam intensity vs distance
Rationale: Intensity decreases proportionally to the square of the
distance from the source.
10. What is the primary function of an intensifying screen?
A. Increase patient dose
B. Convert X-rays to visible light
C. Reduce scatter
D. Increase kVp
Answer: B. Convert X-rays to visible light
Rationale: Screens amplify the signal by converting X-rays into light,
reducing exposure needed.
11. Which projection demonstrates the scaphoid best?
A. AP wrist
B. Ulnar deviation scaphoid view
C. Lateral wrist
D. Oblique wrist
Answer: B. Ulnar deviation scaphoid view
Rationale: Ulnar deviation elongates the scaphoid for better
visualization.
Questions & Verified Answers, Plus
Explained Rationales/Expert Verified For
Guaranteed 100% Pass 2026/Latest
Update/Instant Download Pdf
1. What is the primary purpose of filtration in an X-ray tube?
A. Increase beam intensity
B. Reduce patient dose by removing low-energy photons
C. Increase image contrast
D. Decrease scatter radiation
Answer: B. Reduce patient dose by removing low-energy photons
Rationale: Filtration removes low-energy photons that would be
absorbed by the patient without contributing to image formation,
thereby reducing skin dose.
2. Which interaction is most responsible for diagnostic image
formation?
A. Photoelectric effect
B. Pair production
C. Coherent scatter
D. Compton scatter
Answer: A. Photoelectric effect
Rationale: The photoelectric effect contributes to image contrast
because it involves complete absorption of the X-ray photon.
, 3. Increasing kVp primarily affects:
A. Image contrast
B. Patient positioning
C. Collimation
D. Filtration
Answer: A. Image contrast
Rationale: Higher kVp increases beam penetration and reduces
contrast by increasing scatter.
4. Which device limits the size and shape of the X-ray beam?
A. Grid
B. Filter
C. Collimator
D. Intensifying screen
Answer: C. Collimator
Rationale: Collimators restrict beam size, reducing patient dose and
scatter radiation.
5. What is the purpose of a grid in radiography?
A. Increase image brightness
B. Reduce scatter reaching the image receptor
C. Increase beam quality
D. Reduce patient motion
Answer: B. Reduce scatter reaching the image receptor
Rationale: Grids absorb scattered photons, improving image contrast.
, 6. Which factor increases patient dose the most?
A. Decreasing mAs
B. Increasing SID
C. Increasing mAs
D. Increasing filtration
Answer: C. Increasing mAs
Rationale: mAs directly controls the number of X-ray photons
produced, increasing dose proportionally.
7. The latent image in a digital receptor is:
A. Immediately visible
B. Stored as electrical charge
C. Stored as chemical fog
D. Created after processing only
Answer: B. Stored as electrical charge
Rationale: In digital systems, energy is stored as trapped electrons or
electronic signals until readout.
8. Which term describes the ability to distinguish between similar
tissues?
A. Density
B. Contrast resolution
C. Spatial resolution
D. Magnification
Answer: B. Contrast resolution
Rationale: Contrast resolution refers to the system’s ability to
differentiate subtle differences in tissue attenuation.
, 9. What is the inverse square law used to determine?
A. Exposure vs time
B. Beam intensity vs distance
C. Contrast vs kVp
D. Motion vs blur
Answer: B. Beam intensity vs distance
Rationale: Intensity decreases proportionally to the square of the
distance from the source.
10. What is the primary function of an intensifying screen?
A. Increase patient dose
B. Convert X-rays to visible light
C. Reduce scatter
D. Increase kVp
Answer: B. Convert X-rays to visible light
Rationale: Screens amplify the signal by converting X-rays into light,
reducing exposure needed.
11. Which projection demonstrates the scaphoid best?
A. AP wrist
B. Ulnar deviation scaphoid view
C. Lateral wrist
D. Oblique wrist
Answer: B. Ulnar deviation scaphoid view
Rationale: Ulnar deviation elongates the scaphoid for better
visualization.
