Free Computed Tomography Ultimate Questions and Answers

Question 1

Which artifact occurs when an object is positioned partially in and partially out of the scan field of view?

Accepted Answer

Partial volume artifact

Answer

Metallic artifact

Answer

Motion artifact

Answer

Beam-hardening artifact

Question 2

What is the purpose of using a convolution kernel in CT image reconstruction?

Accepted Answer

To improve image quality

Answer

To adjust radiation dose

Answer

To reduce patient motion

Answer

To enhance spatial resolution

Question 3

Which type of CT scan involves acquiring images at multiple time points to visualize the distribution of contrast agent in tissues?

Accepted Answer

Answer

Dynamic CT

Answer

Perfusion CT

Answer

Virtual CT

Answer

Multiplanar CT

Question 4

What is the primary purpose of CT fluoroscopy?

Accepted Answer

To monitor needle guidance during procedures

Answer

To perform dynamic CT scans

Answer

To visualize blood vessels

Answer

To enhance image resolution

Question 5

Which term refers to the ability of a CT scanner to acquire images in a very short time interval?

Accepted Answer

Temporal resolution

Answer

Spatial resolution

Answer

Contrast resolution

Answer

Axial resolution

Question 6

What is the purpose of a CT scout image (localizer) in patient positioning?

Accepted Answer

To outline the scanning region

Answer

To determine optimal contrast dose

Answer

To assess motion artifacts

Answer

To provide a preliminary diagnosis

Question 7

Which term describes the ability of a CT scanner to accurately represent small objects or structures in the images?

Accepted Answer

Spatial resolution

Answer

Temporal resolution

Answer

Contrast resolution

Answer

Axial resolution

Question 8

Which parameter determines the amount of radiation exposure delivered to the patient during a CT scan?

Accepted Answer

Milliampere-seconds (mAs)

Answer

Slice thickness

Answer

Reconstruction algorithm

Answer

Kilovoltage (kV)

Question 9

What is the purpose of the CT couch indexing feature?

Accepted Answer

To move the patient through the gantry during scanning

Answer

To adjust image contrast

Answer

To synchronize with the patient's breathing

Answer

To increase the tube current

Question 10

Which factor can contribute to the occurrence of ring artifacts in CT images?

Accepted Answer

Detector malfunction

Answer

Patient motion

Answer

High radiation dose

Answer

Metallic objects in the field of view