Chapter 26: Three-Dimensional Digital Imaging

What are some advantages of CBCT imaging?

- Images can be saved digitally in a .jpg or .bmp format - Images can be placed on a compact disc - Images can be emailed to referring dentists

Name some of the common uses of 3D imaging.

-implant placement -extraction or exposure of impacted teeth -definition of anatomic structures -endodontic assessment -airway and sinus analysis -evaluation of the TMJ disorders -orthodontic evaluation -pathology evaluation

A 3D shape that is created from two-dimensional images.

3D Volume Rendering

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.

Cone-Beam Computed Tomography

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

Contrast Resolution

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

Coronal Plane

Name the essential specialized equipment necessary for 3D digital imaging.

DICOM data

The universal format for handling, storing, and transmitting 3D images.

DICOM data

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

Multiplanar Reconstruction (MPR)

Prior to performing CBCT, what instruction should be given to the patient?

Patients will be asked to remove all metallic items in the head and neck region, including jewelry, glasses, and removable dental appliances.

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

Sagittal Plane

A measurement of pixel size in multiplanar reconstruction.

Spatial Resolution

Why is it important for the dental professional who interprets a CBCT scan to be a board-certified oral and maxillofacial radiologist or a dentist with adequate training or experience?

You want to make sure they accurately recognize findings and pathology outside of the region of interest, specifically outside the maxilla and mandible. failure to do so could result in poor treatment outcomes for the dental provider and , more importantly, negative consequences for patients.

T or F: Compared with traditional computed tomography (CT) procedures, cone-beam imaging provides a higher radiation dose for the patient.

False

T or F: Cone-beam data has a 2:1 relationship with the anatomy.

False

The area that can be captured when performing imaging procedures.

Field of View

T or F: 3D imaging provides an in-depth image that gives dental professionals a more complete interpretive image than with 2D scans of traditional imaging.

True

T or F: 3D imaging serves a number of diagnostic purposes for dental practitioners.

True

T or F: A disadvantage of use of cone-beam data is that many dental professionals who incorporate CBCT into their dental practices have not had the training required to interpret anatomy beyond the maxilla and the mandible.

True

T or F: A short exposure time decreases the chances for motion artifacts to occur, as well as encouraging a high level of patient cooperation.

True

T or F: If the field of view is small, findings or pathology in other regions of the oral and maxillofacial complex may be missed.

True

The smallest element of a 3D image.

Voxel

An area of high attenuation that could stop radiation from reaching the receptor could include which restoration(s)? a. metal crown b. bridge c. large amalgam restoration d. all of the above

all of the above

The fact that the cone-beam data has a 1:1 relationship with anatomy means that: a. anatomically accurate images are produced b. magnification of measurements does not occur c. CBCT eliminates the superimposition of structures d. all of the above

all of the above