Question 1

The fourth dimension involved in 4D angiography is ____________.

Accepted Answer

The answer of The fourth dimension involved in 4D angiography...

Question 2

Clinical applications of 3D imaging in CT include all of the following except:

Accepted Answer

3D imaging in CT is commonly used for detailed visualization of complex structures like the craniomaxillofacial complex, GI system, and pulmonary system. However, it is not typically used for the endocrine system, which does not require 3D imaging for most of its clinical evaluations.

Question 3

Which of the following is a volumetric imaging technique that displays bone, soft tissue, and vessels at the same time?

Accepted Answer

The answer of Which of the following is a volumetric...

Question 4

Which of the following is an algorithm intended to create a thick MPR by using the average of the attenuation through the tissues of interest?

Accepted Answer

AIP (Average Intensity Projection) is an algorithm used to create a thick MPR (Multi-Planar Reconstruction) by averaging the attenuation values through the tissues of interest.

Question 5

Algorithms for sliding thin slabs (STS) include all of the following except:

Accepted Answer

Total intensity projection is not a recognized algorithm for sliding thin slabs (STS) in medical imaging.

Question 6

Which of the following algorithms uses only the tissues with the greatest attenuation?

Accepted Answer

Maximum intensity projection (MIP) uses only the tissues with the greatest attenuation by projecting the highest intensity values along the viewing direction.

Question 7

In the semiautomatic mode of __________, the user selects objects to include the data set through the use of windowing.

Accepted Answer

In image segmentation, semiautomatic mode allows users to select objects for the dataset using windowing techniques.

Question 8

Which algorithm provides a valuable perspective in defining lesions for surgical planning or detecting subtle small airway diseases?

Accepted Answer

Minimum intensity projection (MinIP) is useful for detecting subtle small airway diseases by highlighting low-density structures, such as airways, in imaging.

Question 9

Volume rendering provides multiple benefits for virtual CT endoscopy except its ability to:

Accepted Answer

Volume rendering does not inherently combine surface rendering (SR) techniques; it is a separate method for visualizing 3D data.

Question 10

Which of the following is a technique whereby 3D surfaces are extracted from a volume or whereby voxels are extracted from a volume into another 3D segmented region?

Accepted Answer

Volume extraction is the technique where voxels are extracted from a volume into another 3D segmented region.

Question 11

Limitations of maximum intensity projections include each of the following except:

Accepted Answer

The answer of Limitations of maximum intensity projections include each...

Question 12

Typical 3D processing techniques include software to perform all of the following except:

Accepted Answer

Computer-aided diagnosis is not typically considered a 3D processing technique; it is more related to the analysis and interpretation of medical images rather than the processing or visualization of 3D data.

Question 13

What technique is used to virtually unroll, slice open, and display a 3D model of the colon?

Accepted Answer

Virtual dissection is the technique used to digitally unroll, slice open, and display a 3D model of the colon, allowing for detailed examination without physical alteration.

Question 14

All of the following are tissue types used for voxel classification except:

Accepted Answer

The answer of All of the following are tissue types...

Question 15

Preprocessing involves the use of all of the following except:

Accepted Answer

The answer of Preprocessing involves the use of all of...

Question 16

Virtual endoscopy includes all of the following applications except:

Accepted Answer

The answer of Virtual endoscopy includes all of the following...

Question 17

Which imaging technique uses virtual reality (VR) concepts in the creation of inner views of tubular structures?

Accepted Answer

Virtual endoscopy uses VR concepts to create inner views of tubular structures like the gastrointestinal tract.

Question 18

Equipment for 3D image processing does not include:

Accepted Answer

The answer of Equipment for 3D image processing does not...

Question 19

What is the first step in virtual endoscopy imaging?

Accepted Answer

Careful selection of scan parameters is the first step in virtual endoscopy imaging, as it ensures that the images captured are of high quality and suitable for further processing steps like segmentation and rendering.

Question 20

The next step after data acquisition that is intended to optimize the images before they are subject to further processing and analysis is:

Accepted Answer

Image preprocessing is the step after data acquisition that optimizes images for further processing and analysis by enhancing quality and removing noise.

Quiz 13: Three-Dimensional Computed Tomography: Basic Concepts