ARRT CT Registry Questions and
Answers | Latest Version | 2025/2026 |
Correct & Verified
Which artifact appears as streaks near high-density objects like metal implants?
A. Motion artifact
B. Ring artifact
✔✔C. Beam hardening
D. Partial volume
Which reconstruction plane is perpendicular to the long axis of the body?
✔✔A. Axial
B. Sagittal
C. Coronal
D. Oblique
Which parameter should be adjusted to reduce CT dose while maintaining image quality?
A. Increase kVp
✔✔B. Reduce mAs
1
,C. Increase pitch
D. Reduce field of view
Which type of CT detector converts X-ray photons directly into electrical signals?
A. Indirect scintillator detector
✔✔B. Direct conversion detector
C. Ionization chamber
D. Photomultiplier tube
Which artifact results from incomplete calibration of CT detectors?
A. Motion
✔✔B. Ring artifact
C. Beam hardening
D. Partial volume
Which type of CT scan provides the fastest acquisition of volumetric data?
A. Sequential axial
✔✔B. Helical
2
,C. Spiral
D. Step-and-shoot
Which effect is minimized by using thinner slices in CT?
A. Motion artifact
B. Noise
✔✔C. Partial volume artifact
D. Beam hardening
Which CT parameter primarily affects temporal resolution?
A. kVp
B. mAs
✔✔C. Gantry rotation speed
D. Slice thickness
Which reconstruction algorithm is best for soft tissue evaluation?
✔✔A. Soft tissue kernel
B. Bone algorithm
3
, C. Edge-enhancement
D. High-frequency filter
Which CT parameter primarily controls image contrast?
A. mAs
✔✔B. kVp
C. Slice thickness
D. Pitch
Increasing pitch on a helical CT scan will primarily:
A. Improve spatial resolution
✔✔B. Decrease patient dose
C. Increase contrast
D. Reduce scan speed
Which reconstruction algorithm is best for high-resolution bone imaging?
A. Soft tissue kernel
✔✔B. Bone algorithm
4
Answers | Latest Version | 2025/2026 |
Correct & Verified
Which artifact appears as streaks near high-density objects like metal implants?
A. Motion artifact
B. Ring artifact
✔✔C. Beam hardening
D. Partial volume
Which reconstruction plane is perpendicular to the long axis of the body?
✔✔A. Axial
B. Sagittal
C. Coronal
D. Oblique
Which parameter should be adjusted to reduce CT dose while maintaining image quality?
A. Increase kVp
✔✔B. Reduce mAs
1
,C. Increase pitch
D. Reduce field of view
Which type of CT detector converts X-ray photons directly into electrical signals?
A. Indirect scintillator detector
✔✔B. Direct conversion detector
C. Ionization chamber
D. Photomultiplier tube
Which artifact results from incomplete calibration of CT detectors?
A. Motion
✔✔B. Ring artifact
C. Beam hardening
D. Partial volume
Which type of CT scan provides the fastest acquisition of volumetric data?
A. Sequential axial
✔✔B. Helical
2
,C. Spiral
D. Step-and-shoot
Which effect is minimized by using thinner slices in CT?
A. Motion artifact
B. Noise
✔✔C. Partial volume artifact
D. Beam hardening
Which CT parameter primarily affects temporal resolution?
A. kVp
B. mAs
✔✔C. Gantry rotation speed
D. Slice thickness
Which reconstruction algorithm is best for soft tissue evaluation?
✔✔A. Soft tissue kernel
B. Bone algorithm
3
, C. Edge-enhancement
D. High-frequency filter
Which CT parameter primarily controls image contrast?
A. mAs
✔✔B. kVp
C. Slice thickness
D. Pitch
Increasing pitch on a helical CT scan will primarily:
A. Improve spatial resolution
✔✔B. Decrease patient dose
C. Increase contrast
D. Reduce scan speed
Which reconstruction algorithm is best for high-resolution bone imaging?
A. Soft tissue kernel
✔✔B. Bone algorithm
4
