Exam 4 Review

Which of the following best describes cone beam computed tomography (CBCT)?

• Uses a fan-shaped beam to produce 2D images

• Uses a cone-shaped beam to acquire 3D data

• Produces only axial images

• Requires multiple exposures from different machines

The term DICOM refers to:

• A type of radiation detector

• A software used only for panoramic imaging

• A standardized format for storing and sharing imaging data

• A type of voxel measurement

Which plane divides the body into right and left halves?

• Axial

• Coronal

• Sagittal

• Transverse

Which plane divides the body into anterior and posterior portions?

• Axial

• Coronal

• Sagittal

• Oblique

All of the following are advantages of CBCT EXCEPT:

• Lower radiation than medical CT

• 1:1 dimensional accuracy

• No need for specialized training

• Short scan time

What is the primary purpose of CBCT in dentistry?

• Routine bitewing imaging

• Soft tissue diagnosis only

• Enhanced diagnosis and treatment planning

• Caries detection only

The field of view (FOV) refers to:

• The amount of radiation emitted

• The region of interest captured in the scan

• The resolution of the image

• The number of slices in reconstruction

Which of the following is a common use of CBCT?

• Detecting early enamel caries

• Evaluating implant placement

• Measuring plaque levels

• Assessing gingival inflammation

During CBCT imaging, the radiation source:

• Remains stationary

• Rotates around the patient

• Moves vertically only

• Emits radiation in pulses only

Which factor most commonly reduces CBCT image quality?

• High resolution

• Patient movement

• Short scan time

• Small field of view