ARRT CT REGISTRY EXAM
QUESTIONS AND ANSWERS 2026
Which factor(s) has no measurable effect on the spatial resolution?
1. kVp
2. Focal spot size
3. Detector sampling frequency
4. Matrix size
a. 1 only
b. 2 only
c. 1 and 2 only
d. 3 and 4 only -
correct answer ✅A
The following factors affect the spatial resolution of a CT image:
focal spot size, detector size, spacing, field of view, pixel dimension,
matrix size, and detector sampling rate. The kVp does not have an
effect on spatial resolution.
1. The internal and external jugular veins empty into the:
a. subclavian veins.
b. superior vena cava.
,ARRT CT REGISTRY EXAM
QUESTIONS AND ANSWERS 2026
c. brachiocephalic veins.
d. vertebral veins. -
correct answer ✅A
1. The arrow on the image below points to the:
a. rectus abdominis.
b. psoas.
c. pectoralis minor.
d. pectoralis major. -
correct answer ✅C.
1. Modern multidetector CT scanners can discriminate objects with
density differences of _____ or less.
a. 0.10%
b. 0.50%
c. 1%
d. 1.50% -
correct answer ✅B
,ARRT CT REGISTRY EXAM
QUESTIONS AND ANSWERS 2026
1. The large opening on the inferior aspect of the occipital bone
through which the spinal cord descends from the skull is the:
a. foramen magnum.
b. foramen ovale.
c. foramen spinosum.
d. foramen rotundum. -
correct answer ✅A
1. Which of the following is true of retrospective ECG gating?
a. It results in a lower radiation dose than prospective gating.
b. It uses a sequential (axial) scan mode.
c. It acquires data during the entire heart cycle.
d. It depicts the heart as motionless. -
correct answer ✅C
1. Pixel size is equal to:
a. Slice thickness divided by matrix size.
b. Matrix size divided by slice thickness.
c. field of view divided by matrix size.
, ARRT CT REGISTRY EXAM
QUESTIONS AND ANSWERS 2026
d. matrix size divided by field of view. -
correct answer ✅C
1. For routine AP CT, the scan range begins above the dome of the
liver and extends through the:
a. iliac crests.
b. anterior superior iliac spines.
c. pubic symphysis.
d. ischial tuberosities. -
correct answer ✅C
1. A high-spatial-frequency algorithm is generally applied to a chest
exam to display:
a. mediastinal structures.
b. soft tissue.
c. air-filled spaces.
lung vasculature. -
correct answer ✅C
1. Which of the following is considered a mild reaction to contrast
media?
QUESTIONS AND ANSWERS 2026
Which factor(s) has no measurable effect on the spatial resolution?
1. kVp
2. Focal spot size
3. Detector sampling frequency
4. Matrix size
a. 1 only
b. 2 only
c. 1 and 2 only
d. 3 and 4 only -
correct answer ✅A
The following factors affect the spatial resolution of a CT image:
focal spot size, detector size, spacing, field of view, pixel dimension,
matrix size, and detector sampling rate. The kVp does not have an
effect on spatial resolution.
1. The internal and external jugular veins empty into the:
a. subclavian veins.
b. superior vena cava.
,ARRT CT REGISTRY EXAM
QUESTIONS AND ANSWERS 2026
c. brachiocephalic veins.
d. vertebral veins. -
correct answer ✅A
1. The arrow on the image below points to the:
a. rectus abdominis.
b. psoas.
c. pectoralis minor.
d. pectoralis major. -
correct answer ✅C.
1. Modern multidetector CT scanners can discriminate objects with
density differences of _____ or less.
a. 0.10%
b. 0.50%
c. 1%
d. 1.50% -
correct answer ✅B
,ARRT CT REGISTRY EXAM
QUESTIONS AND ANSWERS 2026
1. The large opening on the inferior aspect of the occipital bone
through which the spinal cord descends from the skull is the:
a. foramen magnum.
b. foramen ovale.
c. foramen spinosum.
d. foramen rotundum. -
correct answer ✅A
1. Which of the following is true of retrospective ECG gating?
a. It results in a lower radiation dose than prospective gating.
b. It uses a sequential (axial) scan mode.
c. It acquires data during the entire heart cycle.
d. It depicts the heart as motionless. -
correct answer ✅C
1. Pixel size is equal to:
a. Slice thickness divided by matrix size.
b. Matrix size divided by slice thickness.
c. field of view divided by matrix size.
, ARRT CT REGISTRY EXAM
QUESTIONS AND ANSWERS 2026
d. matrix size divided by field of view. -
correct answer ✅C
1. For routine AP CT, the scan range begins above the dome of the
liver and extends through the:
a. iliac crests.
b. anterior superior iliac spines.
c. pubic symphysis.
d. ischial tuberosities. -
correct answer ✅C
1. A high-spatial-frequency algorithm is generally applied to a chest
exam to display:
a. mediastinal structures.
b. soft tissue.
c. air-filled spaces.
lung vasculature. -
correct answer ✅C
1. Which of the following is considered a mild reaction to contrast
media?
