CHAPTER 26: 3D DIGITAL IMAGING Flashcards
What year was the CBCT introduced ?
1999
what is CBCT?
Cone-beam computed tomography
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.
CBCT
The universal format for handling, storing, and transmitting three-dimensional images; the acronym refers to Digital Imaging and Communications in Medicine.
Dicom Data
The area that can be captured when performing imaging procedures.
Field of view (FOV)
The reconstruction of raw data into images when imported into viewing software to create three anatomic planes of the body.
Multiplanar reconstruction (MPR)
A horizontal plane that divides the body into superior and inferior parts; runs parallel to the ground.
Axial Plane
A vertical plane that divides the body into anterior and posterior sides; runs perpendicular to the ground.
Coronal plane
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.
sagital plane
The number of gray-scale colors available for each pixel in the image.
resolution contrast
A measurement of pixel size in multiplanar reconstruction.
resolution spatial
An image that demonstrates the anatomy in three dimensions.
three dimensional digital imaging
A three-dimensional shape that is created from two-dimensional images.
three dimensional volume rendering
The smallest element of a three-dimensional image; also referred to as volume element or three-dimensional pixel.
Voxel
Anatomic features within the FOV provide accurate dimensional measurements of the patient with a : ratio relationship
1:1
The volume of data produced is similar to medical CT, but CBCT uses much (less/more) radiation to acquire the images.
less
Most dentists who use the CBCT imaging techniques (have/ do not have) the formal training that is required to interpret data on anatomic areas beyond the maxilla and the mandible.
do not have
Radiology (AAOMR) recommends that CBCT images be interpreted only by a board-certified oral and maxillofacial radiologist, or by a dentist with adequate training and/or experience. TRUE OR FALSE
true
a nonprofit organization that has developed standards applicable to the minimal requirements for optimum patient care when using dental computed tomography.
Intersocietal Accreditation Comission (IAC)
The essential components for three dimensional imaging system include:
CBCT machine,
computer,
viewing software
Prior to installation of a CBCT unit, a radiation physicist is contacted to evaluate the proper physical space in the dental office to house a CBCT machine. TRUE OR FALSE
TRUE
Scan times with the CBCT machine varie between how many seconds
7 and 30 seconds
CBCT examinations should be performed only when necessary to provide information that cannot be provided using other imaging modalities. true or false
true
Some of the common uses of three-dimensional imaging include the following:
implant placement
extraction or exposure of impacted teeth
definition of anatomic structures
endodontic assessment
airway and sinus analysis
evaluation of TMJ disorders
orthodontic evaluation
evaluation of lesions and abnormalities
trauma evaluation
Advantages of Three-Dimensional Digital Imaging:
Lower radiation dose
brief scanning time
anatomically accurate images
ability to save and easily transport images.
Disadvantages of Three-Dimensional Digital Imaging
Patient movement and artifacts
size of FOV
Cost of equipment
lack of training in interpretation of image data
provides the dental professional with a more complete interpretive image than does traditional dental imaging, which can only provide two dimensions.
three dimensional imaging
