Free Computed Tomography Science Questions and Answers

Question 1

What is the primary principle behind computed tomography imaging?

Accepted Answer

X-ray absorption

Answer

Magnetic resonance

Answer

Ultrasound reflection

Answer

Nuclear emission

Question 2

Which component of a CT scanner is responsible for rotating the X-ray tube and detector around the patient?

Accepted Answer

Gantry

Answer

Generato

Answer

Console

Answer

Collimator

Question 3

In CT imaging, what does the term "slice thickness" refer to?

Accepted Answer

The distance between adjacent slices

Answer

The width of the X-ray beam

Answer

The height of the detector array

Answer

The diameter of the gantry

Question 4

Which type of contrast agent is commonly used in CT imaging to enhance blood vessels and soft tissue?

Accepted Answer

Iodinated contrast

Answer

Barium sulfate

Answer

Gadolinium-based contrast

Answer

Ferumoxytol

Question 5

What is the Hounsfield unit (HU) scale used for in CT imaging?

Accepted Answer

Describing tissue density

Answer

Measuring radiation dose

Answer

Quantifying image noise

Answer

Determining patient weight

Question 6

Which imaging technique can provide information about blood flow and perfusion in addition to anatomical details?

Accepted Answer

Dynamic CT perfusion

Answer

Positron Emission Tomography (PET)

Answer

Magnetic Resonance Imaging (MRI)

Answer

Single Photon Emission Computed Tomography (SPECT)

Question 7

What is the purpose of the CT reconstruction process?

Accepted Answer

To convert raw data into an image

Answer

To remove artifacts from the images

Answer

To enhance the spatial resolution

Answer

To increase the radiation dose

Question 8

Which type of CT scan is commonly used to assess bone density and diagnose osteoporosis?

Accepted Answer

Dual-energy CT

Answer

Helical CT

Answer

Multidetector CT

Answer

Dynamic CT

Question 9

Which type of artifact is caused by high-density materials like metal in the CT scan's field of view?

Accepted Answer

Beam-hardening artifact

Answer

Motion artifact

Answer

Ring artifact

Answer

Partial volume artifact

Question 10

What is the purpose of the CT scout (topogram) image?

Accepted Answer

To assist in patient positioning

Answer

To provide a preliminary diagnosis

Answer

To perform a dose check

Answer

To calculate contrast injection rate