An advantage of CBCT over conventional dental imaging is _______________.
A. ability to visualize in 3 dimensions
B. decreased patient exposure
C. decreased cost to patient
D. ability to see soft tissue
The advantages of CBCT over a medical MDCT are _______________.
A. less radiation exposure to patient
B. faster scan
C. less cost for the scan
D. All of the above.
CBCT machines may be classified based upon the _______________.
A. shape of the x-ray beam
B. field of view
C. exposure time
Modifying which factor would decrease radiation patient to the patient during a CBCT scan?
A. Decreasing the field of view
B. Increasing the region of interest
C. Increasing the scan time
D. Decreasing the voxel size
Voxel size in CBCT image acquisition _______________.
A. may be modified by post-processing
B. is pre-selected by patient size
C. is the same as for a medical MSCT
D. is isotrophic in nature
Selection of an increased voxel size for a CBCT scan _______________.
A. affects measurement accuracy
B. affects structural relationships
C. decreases image resolution
D. increases image detail
The interpretation of the CBCT image volume should be _______________.
A. systematic, treatment-directed
B. systematic, comprehensive
C. focused, limited
D. focused, symptom-directed
Which view is considered a reformatted image useful in implant planning?
“Beam hardening” artifacts in CBCT images can occur as a result of _______________.
A. patient movement during the acquisition
B. superimposition of structures
C. dense, radiopaque materials within the area scanned
D. too low of exposure setting
A CBCT scan may need to be reacquired if _______________.
A. the patient’s head was tipped resulting in distortion
B. double contours of bone are seen on the images
C. the patient continued to breath during the scan acquisition
D. the voxel size was too small
A CBCT scan would be potentially helpful for which assessment?
A. Locating an accessory canal during endodontic treatment
B. Determining a crack in enamel for a patient with pain on biting
C. Noting disk displacement in the TMJ area
D. Finding caries beneath a dental restoration or cast crown
What type of findings can be visualized in a CBCT image?
A. Mucous plug in salivary duct
B. Hematoma at an injection site
C. Asymmetry or interruption of airway space
D. Salivary gland outlines within the soft tissue
In a scan of the temporomandibular joints, which could be potentially confirmed or denied on a CBCT scan?
A. Disk displacement
B. Edema following trauma
C. Condylar neck fracture
D. Soft tissue tumor
CBCT scans are indicated in the treatment planning for routine cases in _______________.
B. third molar extractions
D. All of the above.
E. None of the above.
What is the dentist’s interpretive responsibility for a large FOV CBCT scan?
A. Teeth and alveolar bone
B. Maxilla and mandible
C. Dental arches and maxillary sinuses
D. All areas imaged within the scan