Free ARRT Computed Tomography Practice Questions
Original questions with explanations
These original ARRT Computed Tomography practice questions are educational examples designed to exercise reasoning. They are not recalled exam items and do not imply access to live or confidential test content.
Question 1
Which change most directly reduces partial-volume averaging?
- A. Use thinner reconstructed sections
- B. Increase section thickness
- C. Increase display field only
- D. Remove calibration
Answer and explanation
A. Use thinner reconstructed sections Thinner sections reduce the amount of different tissue averaged into one voxel.
Question 2
A patient develops dyspnea after contrast administration. What is the priority?
- A. Ask the patient to drive home
- B. Delete the record
- C. Stop, assess airway and breathing, and activate the facility response protocol
- D. Finish the scan first
Answer and explanation
C. Stop, assess airway and breathing, and activate the facility response protocol Possible acute contrast reaction requires immediate assessment and protocol-based response.
Question 3
What is the primary purpose of a CT time-out?
- A. Shorten reconstruction
- B. Verify patient, procedure, site, key risks, and team readiness
- C. Select image colors
- D. Replace consent
Answer and explanation
B. Verify patient, procedure, site, key risks, and team readiness A time-out is a coordinated safety check before proceeding.
Question 4
Which factor directly increases radiation dose when other settings are unchanged?
- A. Changing monitor brightness
- B. Decreasing display field
- C. Increasing tube current-time product
- D. Using a wider window
Answer and explanation
C. Increasing tube current-time product More mAs generally increases photon output and patient dose.
Question 5
Which outline applies to a September 2026 test?
- A. The retired August outline
- B. Any radiography outline
- C. A vendor summary alone
- D. The ARRT CT specifications effective September 1, 2026
Answer and explanation
D. The ARRT CT specifications effective September 1, 2026 ARRT publishes date-specific specifications that must match the test date.
How to Review Your Results
For every missed item, name the tested concept, explain why the correct option is best, and identify the clue that rules out each distractor. Then review the corresponding official content domain.