ARRT Registry Exam Review
Questions and Answers | Latest
Version | 2025/2026 | Correct & Verified
What happens to density if mAs is doubled?
✔✔A. Density doubles
B. Density halves
C. Density remains unchanged
D. Density decreases by 25%
What is the function of the anode in the x-ray tube?
✔✔A. To serve as the target for electron interaction
B. To control electron flow
C. To emit light
D. To act as a focusing cup
What interaction is primarily responsible for image formation in diagnostic radiography?
✔✔A. Photoelectric effect
B. Compton scatter
1
,C. Pair production
D. Coherent scatter
Increasing SID does what to image sharpness?
✔✔A. Increases sharpness
B. Decreases sharpness
C. No effect
D. Causes magnification
Which of the following is a stochastic effect of radiation exposure?
✔✔A. Cancer
B. Skin erythema
C. Cataracts
D. Sterility
Which part of the image intensifier converts x-rays into light?
✔✔A. Input phosphor
B. Output phosphor
2
,C. Photocathode
D. Focusing lens
The term "latency period" in radiation exposure refers to:
✔✔A. Time between exposure and appearance of effects
B. The time x-rays are produced
C. The time required for beam filtration
D. The time patient is under the beam
Which of the following reduces motion blur?
✔✔A. Short exposure time
B. High kVp
C. Increased OID
D. Low mAs
The focal spot size affects which image property most?
✔✔A. Spatial resolution
B. Contrast
3
, C. Density
D. Magnification
The process of electron emission from the filament is called:
✔✔A. Thermionic emission
B. Photoemission
C. Ionization
D. Bremsstrahlung
Which type of radiation results from the deceleration of high-speed electrons near the nucleus?
✔✔A. Bremsstrahlung radiation
B. Characteristic radiation
C. Secondary radiation
D. Scatter radiation
What is the purpose of using a grid in radiography?
A. To reduce patient exposure
✔✔B. To reduce scatter radiation and improve image contrast
4
Questions and Answers | Latest
Version | 2025/2026 | Correct & Verified
What happens to density if mAs is doubled?
✔✔A. Density doubles
B. Density halves
C. Density remains unchanged
D. Density decreases by 25%
What is the function of the anode in the x-ray tube?
✔✔A. To serve as the target for electron interaction
B. To control electron flow
C. To emit light
D. To act as a focusing cup
What interaction is primarily responsible for image formation in diagnostic radiography?
✔✔A. Photoelectric effect
B. Compton scatter
1
,C. Pair production
D. Coherent scatter
Increasing SID does what to image sharpness?
✔✔A. Increases sharpness
B. Decreases sharpness
C. No effect
D. Causes magnification
Which of the following is a stochastic effect of radiation exposure?
✔✔A. Cancer
B. Skin erythema
C. Cataracts
D. Sterility
Which part of the image intensifier converts x-rays into light?
✔✔A. Input phosphor
B. Output phosphor
2
,C. Photocathode
D. Focusing lens
The term "latency period" in radiation exposure refers to:
✔✔A. Time between exposure and appearance of effects
B. The time x-rays are produced
C. The time required for beam filtration
D. The time patient is under the beam
Which of the following reduces motion blur?
✔✔A. Short exposure time
B. High kVp
C. Increased OID
D. Low mAs
The focal spot size affects which image property most?
✔✔A. Spatial resolution
B. Contrast
3
, C. Density
D. Magnification
The process of electron emission from the filament is called:
✔✔A. Thermionic emission
B. Photoemission
C. Ionization
D. Bremsstrahlung
Which type of radiation results from the deceleration of high-speed electrons near the nucleus?
✔✔A. Bremsstrahlung radiation
B. Characteristic radiation
C. Secondary radiation
D. Scatter radiation
What is the purpose of using a grid in radiography?
A. To reduce patient exposure
✔✔B. To reduce scatter radiation and improve image contrast
4
