Free Computed Tomography Knowledge Questions and An

Question 1

What does the term "windowing" refer to in CT image analysis?

Accepted Answer

Changing the display brightness and contrast

Answer

Adjusting the field of view

Answer

Applying a convolution kernel

Answer

Enhancing image sharpness

Question 2

Which factor contributes to the occurrence of motion artifacts in CT imaging?

Accepted Answer

Fast scan times

Answer

High radiation dose

Answer

Slow heart rate

Answer

Sedation of the patient

Question 3

What is the purpose of the CT bowtie filter?

Accepted Answer

To shape the X-ray beam

Answer

To reduce patient dose

Answer

To eliminate beam hardening

Answer

To improve image contrast

Question 4

Which parameter is controlled by the milliampere-seconds (mAs) setting in CT scanning?

Accepted Answer

Radiation exposure

Answer

Slice thickness

Answer

Tube voltage

Answer

Image resolution

Question 5

What type of CT scan is often used for assessing coronary artery disease and cardiac anatomy?

Accepted Answer

Cardiac CT

Answer

Axial CT

Answer

Helical CT

Answer

Perfusion CT

Question 6

Which imaging modality is typically combined with CT to provide functional and metabolic information?

Accepted Answer

Positron Emission Tomography (PET)

Answer

Magnetic Resonance Imaging (MRI)

Answer

Ultrasound

Answer

Single Photon Emission Computed Tomography (SPECT)

Question 7

What is the purpose of the CT localizer (scout) scan?

Accepted Answer

To define the scanning region

Answer

To check for motion artifacts

Answer

To determine the radiation dose

Answer

To verify patient identity

Question 8

What is the primary advantage of using a higher pitch value in helical CT scans?

Accepted Answer

Faster scan speed

Answer

Improved image contrast

Answer

Reduced radiation dose

Answer

Increased spatial resolution

Question 9

What is the purpose of contrast bolus tracking in CT angiography?

Accepted Answer

To monitor contrast agent injection

Answer

To minimize patient motion

Answer

To improve image resolution

Answer

To enhance the patient's comfort

Question 10

Which artifact appears as dark streaks in a CT image, often caused by dense structures like bones?

Accepted Answer

Streak artifact

Answer

Beam-hardening artifact

Answer

Motion artifact

Answer

Metallic artifact