Radiography Chapter 26 Questions
An image that demonstrates the anatomy in three dimensions.
3D Digital Imaging
A three-dimensional shape that is created from two-dimensional images.
3D volume rendering
Term used to describe computer-assisted digital imaging in dentistry; used interchangeably with Cone beam volume imaging; these terms are used to differentiate this procedure from medical computed tomography (CT)
Cone beam volume tomography
Term used to describe computer-assissted digital imaging in dentistry; this imaging technique uses a cone-shaped x-ray beam to acquire information and present it in 3D.
Cone-beam computed tomography (CBCT)
The number of gray scale colors available 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
The universal format for handling, storing, and transmitting 3D images; the acronym refers to digital imaging and communications in medicine.
DICOM data
The reconstruction of raw data into images when imported into viewing software to create three anatomic planes of the body.
Multiplanar reconstruction (MPR)
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.
Sagittal plane
A measurement of pixel size in multiplanar reconstruction.
Spatial resolution
True or False: If the field of view is small, findings or pathology in other regions of the oral and maxillofacial complex may be missed.
True
A horizontal plane that divides the body into superior and inferior parts; runs parallel to the ground.
Axial plane
True or False: Compared with traditional computer tomography (CT) procedures, cone beam imaging provides a higher radiation dose for the patient.
False
True or False: Cone-beam data are said to have a 2:1 relationship with the anatomy.
False
The area that can be captured when performing imaging procedures.
Field of view
True or False: A disadvantage of use of cone-beam data is that many dental professionals who incorporate CBCT into their practices have not had the training required to interpret anatomy beyond the maxilla and mandible.
True
True or False: A short exposure time decreases the chances for motion artifacts to occur, as well as encouraging a high level of patient cooperation.
True
True or False: Three-dimensional imaging provides an in-depth image that gives dental professionals a more complete interpretive image than with two-dimensional scans of traditional radiography.
True
True or False: Three-dimensional imaging serves a number of diagnostic purposes for dental practitioners.
True
The smallest element of a three-dimensional image; also referred to as volume element or three-dimensional pixel.
Voxel
Advantages of the CBCT include which of the following? a.images can be saved digitally in a .jpg or .bmp format b.images can be placed on a compact disc media c.images can be e-mailed to referring dentists d.all of the above
d. all of the above
An area of high attenuation that could stop radiation from reaching the receptor could include which of the following? a.metal crown b.bridge c.large amalgam restoration d.all of the above
d. all of the above
The fact that the cone-beam data has a 1 : 1 relationship with the 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
d. all of the above
