ARRT Registry Review Questions and
Answers | Latest Version | 2025/2026 |
Correct & Verified
What is the primary purpose of a grid in radiography?
✔✔To reduce scatter radiation and improve image contrast
What is the effect of increasing kVp on radiographic contrast?
✔✔It decreases contrast but increases penetration
Which imaging modality is best for detecting soft tissue abnormalities in the brain?
✔✔MRI
What is the primary safety concern when performing MRI on patients with pacemakers?
✔✔Device malfunction or heating
What does ALARA stand for in radiation safety?
✔✔As Low As Reasonably Achievable
1
,Which projection is commonly used to evaluate the cervical spine for trauma?
✔✔Lateral projection
Which contrast media is used for intravenous CT imaging?
✔✔Iodinated contrast
What is the main purpose of a compensating filter?
✔✔To even out exposure across areas of varying tissue thickness
Which type of focal spot is used to improve spatial resolution in extremity imaging?
✔✔Small focal spot
What is the relationship between SID and image magnification?
✔✔Increasing SID decreases magnification
What interaction primarily contributes to patient dose but not image formation?
✔✔Compton scatter
2
,Which technique factor primarily affects image density?
✔✔mAs
What type of grid error results in reduced density across the entire image?
✔✔Upside-down grid
Which anatomical plane divides the body into left and right halves?
✔✔Sagittal plane
Which imaging plane divides the body into anterior and posterior portions?
✔✔Coronal plane
What is the main function of the anode in an X-ray tube?
✔✔To serve as the target for electrons to produce X-rays
Which digital imaging artifact occurs when the patient moves during the exposure?
✔✔Motion artifact
3
, Which patient population is at highest risk for nephrogenic systemic fibrosis when receiving
gadolinium?
✔✔Patients with renal failure
What is the effect of increasing OID on image magnification and spatial resolution?
✔✔Magnification increases and spatial resolution decreases
Which MRI sequence is most sensitive for detecting multiple sclerosis plaques?
✔✔FLAIR
Which factor affects radiographic contrast more significantly than density?
✔✔kVp
What type of detector converts X-rays directly into an electrical signal?
✔✔Direct flat-panel detector
Which artifact appears as bright lines or dark streaks due to patient misalignment?
✔✔Grid cutoff
4
Answers | Latest Version | 2025/2026 |
Correct & Verified
What is the primary purpose of a grid in radiography?
✔✔To reduce scatter radiation and improve image contrast
What is the effect of increasing kVp on radiographic contrast?
✔✔It decreases contrast but increases penetration
Which imaging modality is best for detecting soft tissue abnormalities in the brain?
✔✔MRI
What is the primary safety concern when performing MRI on patients with pacemakers?
✔✔Device malfunction or heating
What does ALARA stand for in radiation safety?
✔✔As Low As Reasonably Achievable
1
,Which projection is commonly used to evaluate the cervical spine for trauma?
✔✔Lateral projection
Which contrast media is used for intravenous CT imaging?
✔✔Iodinated contrast
What is the main purpose of a compensating filter?
✔✔To even out exposure across areas of varying tissue thickness
Which type of focal spot is used to improve spatial resolution in extremity imaging?
✔✔Small focal spot
What is the relationship between SID and image magnification?
✔✔Increasing SID decreases magnification
What interaction primarily contributes to patient dose but not image formation?
✔✔Compton scatter
2
,Which technique factor primarily affects image density?
✔✔mAs
What type of grid error results in reduced density across the entire image?
✔✔Upside-down grid
Which anatomical plane divides the body into left and right halves?
✔✔Sagittal plane
Which imaging plane divides the body into anterior and posterior portions?
✔✔Coronal plane
What is the main function of the anode in an X-ray tube?
✔✔To serve as the target for electrons to produce X-rays
Which digital imaging artifact occurs when the patient moves during the exposure?
✔✔Motion artifact
3
, Which patient population is at highest risk for nephrogenic systemic fibrosis when receiving
gadolinium?
✔✔Patients with renal failure
What is the effect of increasing OID on image magnification and spatial resolution?
✔✔Magnification increases and spatial resolution decreases
Which MRI sequence is most sensitive for detecting multiple sclerosis plaques?
✔✔FLAIR
Which factor affects radiographic contrast more significantly than density?
✔✔kVp
What type of detector converts X-rays directly into an electrical signal?
✔✔Direct flat-panel detector
Which artifact appears as bright lines or dark streaks due to patient misalignment?
✔✔Grid cutoff
4
