1) The universal format for handling, storing, and transferring 3D images
b. DICOM data
2) The smallest element of a 3D image
i. voxel
3) A measurement of pixel size in multiplanar reconstruction.
h. spatial resolution
4) A vertical plane that divides the body into right and left sides; runs perpendicular to the ground.
f. sagittal plane
5) The reconstruction of raw data into images when imported into viewing software to create three anatomical planes of the body.
d. multiplanar reconstruction (MPR)
6) The area that can be captured when performing imaging procedures.
c. field of view
7) Term used to describe computer assisted digital imaging in dentistry; this imaging technique uses a cone shaped xray beam to acquire info and present it in 3D
a. cone beam computed tomography
8) A vertical plane that divides the body into anterior and posterior sides; runs perpendicular to the ground
e. coronal
9) The number of gray scale colors available to be chosen for each pixel in the image.
g. contrast resolution
10) A 3D shape that is created from 2D images
j. 3D volume rendering
11) Compared with traditional computed tomography (CT) procedures, cone beam imaging provides a higher radiation dose for the patient
false
12) A short exposure time decreases the chances for motion artifacts to occur, as well as encouraging a high level of patient cooperation.
true
13) If the field of view is small, findings or pathology in other regions of the oral and maxillofacial complex may be missed.
true
14) Cone beam data has a 2:1 relationship with the anatomy.
false
15) 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
16) 3D imaging provides an in depth image that gives dental professionals a more complete interpretive image than with 2D scans of traditional imaging.
true
17) 3D imaging serves a number of diagnostic purposes for dental practitioners
true
18) An area of high attenuation that could stop radiation from reaching the receptor could include which restorations?
d. all of the above
(metal crown, bridge, large amalgam restoration)
19) What are the advantages of CBCT imaging?
d. all of the above
(images can be saved digitally in .jpg or .bmp, images can be placed on a compact disc, images can be emailed to referring dentists)
20) The fact that the cone beam data has a 1:1 relationship with the anatomy means that
d. all of the above
( anatomically accurate images are produced, magnification of measurements does not occur, CBCT eliminates the superimposition of structures)
Common uses of 3D imaging
implant placement
extraction or exposure of impacted teeth
endo assesment
airway and sinus analysis
ortho evaluation
trauma evaluation
Advantages of 3D digital imaging (4)
1) lower radiation dose (than traditional medical CT scans)
2) brief scanning time
3) anatomically accurate images
4) ability to save and easily transport images
Disadvantages of 3D digital imaging (4)
1) patient movement and artifacts
2) side of the FOV
3) cost of equipment; training needed for imaging software
4) lack of training in interpretation of image data on areas other than the mouth
Cone beam computed tomography (CBCT)
computer assisted digital imaging; uses a cone shaped xray beam to acquire info and present it in 3D
Cone beam volume tomography (CBVT)
used interchangeably with cone beam volume imagining
DICOM data
The universal format for handling, storing, and transmitting three-dimensional images; the acronym refers to Digital Imaging and Communications in Medicine.
Multiplanar reconstruction (MPR)
The reconstruction of raw data into images when imported into viewing software to create three anatomic planes of the body
Axial plane
A horizontal flat surface dividing the body into upper and lower parts; runs parallel to the ground
Coronal plane
vertical plane that divides the body into anterior and posterior portions; runs perpendicular to the ground
Sagittal plane
a vertical plane that divides the body into right and left sides; runs perpendicular to the ground
Contrast resolution
The number of gray scale colors available for each pixel in the image
Spatial resolution
A measurement of pixel size in multiplanar reconstruction