Chapter 26 Quiz on 3-Dimensional Digital Imaging

Question 1

Term used to describe computer-assisted digital imaging in dentistry; this imaging technique uses a cone-shaped x-ray beam to acquire information and present it in three dimensions.

Answer 1

Cone-beam computed tomography CBCT

Question 2

The universal format for handling, storing, and transmitting three-dimensional images; the acronym refers to Digital Imaging and Communications in Medicine .

Answer 2

DICOM data:

Question 3

The area that can be captured when performing imaging procedures.

Answer 3

Field of View FOV

Question 4

The reconstruction of raw data into images when imported into viewing software to create three anatomic planes of the body.

Answer 4

Multiplanar reconstruction (MPR)

Question 5

A horizontal plane that divides the body into superior and inferior parts; runs parallel to the ground.

Answer 5

Plane, axial

Question 6

A vertical plane that divides the body into anterior and posterior sides; runs perpendicular to the ground.

Answer 6

Plane, coronal

Question 7

A vertical plane that divides the body into right and left sides; runs perpendicular to the ground. A midsagittal plane describes a plane that runs through the midline of the body.

Answer 7

Plane, sagittal

Question 8

The number of gray-scale colors available for each pixel in the image.

Answer 8

Resolution, contrast

Question 9

A measurement of pixel size in multiplanar reconstruction.

Answer 9

Resolution, spatial

Question 10

An image that demonstrates the anatomy in three dimensions.

Answer 10

3 D digital imaging

Question 11

A three-dimensional shape that is created from two-dimensional images.

Answer 11

3 D volume rendering

Question 12

The smallest element of a three-dimensional image; also referred to as volume element or three-dimensional pixel .

Answer 12

Voxel

Question 13

are imported into the viewing software that allows the dental practitioner to see the FOV in three dimensions.

Once the images are imported the data is viewed in 3 planes:

• Axial plane
• Coronal plane
• Sagittal plane

Answer 13

DICOM images

Question 14

multiplanar reconstructed images (MPR images) .

Answer 14

When viewed together, axial, coronal, and sagittal images are referred to as

Question 15

refers to the number of gray scales available,

Answer 15

Contrast Resolution

Question 16

is the measurement, in millimeters, of the size of pixels in the MPR images.

Answer 16

Spatial resolution

Question 17

Some of the common uses of three-dimensional imaging include the following:

Answer 17

• Implant placement
• Extraction or exposure of impacted teeth
• Definition of anatomic structures, such as inferior alveolar nerve and mental foramen location
• Endodontic assemssment
• Airway and sinus analysis
• Evaluation of TMJ
• Orthodontic evaluation
• Evaluation of lesions and abnormalities
• Trauma evaluation

Question 18

Advantages of 3 D dimensional digital imaging

Answer 18

1. Lower Radiation Dose
2. Brief Scanning Time
3. Anatomically accurate images
4. Ability to save and easil transport images

Question 19

Disadvantages of 3 D digital imaging

Answer 19

1. Patient movement and artifcats
2. Size of the FOV
3. cost of equipment and training needed for imaging software
4. lack of training in interpretation of image data on areas oustide the maxilla and mandible