Computed Tomography for
Technologists 2nd Edition Exam Review
Questions and Answers (2024/2025)
100% Pass
Which component controls the rotation speed of the gantry in a CT scanner?
A. ✔✔Slip rings
B. Collimator
C. X-ray tube
D. Detector array
Which parameter is adjusted to decrease image noise in CT?
A. Slice interval
B. ✔✔Increasing mAs
C. Decreasing pitch
D. Narrowing window width
Which CT artifact is caused by rapid patient movement?
A. ✔✔Motion artifact
1
,B. Beam hardening
C. Ring artifact
D. Photon starvation
Which part of the CT scanner houses the X-ray tube and detectors?
A. Console
B. ✔✔Gantry
C. Table
D. Collimator
Which CT parameter affects contrast resolution?
A. Gantry tilt
B. ✔✔Window width
C. Pitch
D. Slice thickness
Which type of CT scanner uses multiple rows of detectors?
A. Single-slice CT
2
,B. ✔✔Multi-slice CT
C. Helical CT
D. Cone beam CT
Which method reduces metal artifacts in CT images?
A. ✔✔Iterative reconstruction
B. Decreasing mAs
C. Increasing pitch
D. Narrowing window width
Which unit is used to measure radiation dose in CT?
A. ✔✔mSv (millisievert)
B. Gray (Gy)
C. Rad
D. Curie (Ci)
Which factor influences spatial resolution in CT imaging?
A. Gantry rotation speed
3
, B. ✔✔Matrix size
C. Contrast injection rate
D. mAs setting
Which CT artifact appears as dark streaks near metal objects?
A. Ring artifact
B. ✔✔Beam hardening
C. Motion artifact
D. Photon starvation
Which parameter is optimized to reduce radiation dose in pediatric CT?
A. ✔✔Lowering mAs
B. Increasing kVp
C. Using thicker slices
D. Reducing matrix size
Which imaging plane is commonly used for sinus CT scans?
A. Axial
4
Technologists 2nd Edition Exam Review
Questions and Answers (2024/2025)
100% Pass
Which component controls the rotation speed of the gantry in a CT scanner?
A. ✔✔Slip rings
B. Collimator
C. X-ray tube
D. Detector array
Which parameter is adjusted to decrease image noise in CT?
A. Slice interval
B. ✔✔Increasing mAs
C. Decreasing pitch
D. Narrowing window width
Which CT artifact is caused by rapid patient movement?
A. ✔✔Motion artifact
1
,B. Beam hardening
C. Ring artifact
D. Photon starvation
Which part of the CT scanner houses the X-ray tube and detectors?
A. Console
B. ✔✔Gantry
C. Table
D. Collimator
Which CT parameter affects contrast resolution?
A. Gantry tilt
B. ✔✔Window width
C. Pitch
D. Slice thickness
Which type of CT scanner uses multiple rows of detectors?
A. Single-slice CT
2
,B. ✔✔Multi-slice CT
C. Helical CT
D. Cone beam CT
Which method reduces metal artifacts in CT images?
A. ✔✔Iterative reconstruction
B. Decreasing mAs
C. Increasing pitch
D. Narrowing window width
Which unit is used to measure radiation dose in CT?
A. ✔✔mSv (millisievert)
B. Gray (Gy)
C. Rad
D. Curie (Ci)
Which factor influences spatial resolution in CT imaging?
A. Gantry rotation speed
3
, B. ✔✔Matrix size
C. Contrast injection rate
D. mAs setting
Which CT artifact appears as dark streaks near metal objects?
A. Ring artifact
B. ✔✔Beam hardening
C. Motion artifact
D. Photon starvation
Which parameter is optimized to reduce radiation dose in pediatric CT?
A. ✔✔Lowering mAs
B. Increasing kVp
C. Using thicker slices
D. Reducing matrix size
Which imaging plane is commonly used for sinus CT scans?
A. Axial
4
