Computed Tomography Test CT Equipment and Technology

Question 1

What is the primary component responsible for X-ray production in a CT scanner?

Accepted Answer

X-ray tube

Answer

Detector array

Answer

Collimator

Answer

Gantry motor

Question 2

What technology allows modern helical CT scanners to rotate continuously without stopping?

Accepted Answer

Slip ring technology

Answer

Electromagnetic braking

Answer

Cable drive system

Answer

Gear reduction transmission

Question 3

What is the primary function of the pre-patient collimator in a CT scanner?

Accepted Answer

To define the width of the X-ray beam along the z-axis

Answer

To filter scattered radiation from the patient

Answer

To focus the X-ray beam onto the detector

Answer

To reduce the energy of the X-ray beam

Question 4

Which detector material is most commonly used in modern solid-state CT detectors?

Accepted Answer

Gadolinium oxysulfide (GOS)

Answer

Sodium iodide (NaI)

Answer

Cesium iodide (CsI)

Answer

Bismuth germanate (BGO)

Question 5

What is the 'gantry' in a CT scanner?

Accepted Answer

The rotating frame housing the X-ray tube and detector array

Answer

The patient support table

Answer

The computer processing unit

Answer

The high-voltage power supply

Question 6

What is the purpose of the bow-tie (wedge) filter in CT?

Accepted Answer

To compensate for the varying thickness of the patient's body cross-section

Answer

To increase radiation dose to the center of the patient

Answer

To remove high-energy photons from the beam

Answer

To reduce motion artifacts

Question 7

What is the typical gantry rotation time for a modern high-speed CT scanner?

Accepted Answer

0.27–0.5 seconds per rotation

Answer

2–5 seconds per rotation

Answer

1–2 seconds per rotation

Answer

0.05–0.1 seconds per rotation