CBCT

Question 1

What is the main indication for using CBCT over CT?

Answer 1

CBCT has a much lower radiation dose than medical grade CT

Question 2

What does CBCT stand for?

Answer 2

Cone-beam computer tomography

Question 3

Prior to a CBCT scan being performed, an initial positioning view is usually taken. Why is this?

Answer 3

This ensures that the area of concern is in the field of view

Question 4

For a CBCT, are the x-ray tube and flat panel receptor rotating in different directions or the same direction?

Answer 4

Same direction

Question 5

In a CBCT scan which x-ray component sends the information to the computer where an image will be produced?

Answer 5

Receptor

Question 6

For CBCT, if multi-planar imaging is available, what are the three slices that will be displayed?

Answer 6

Axial
Coronal
Sagittal

Question 7

What are the four main indications for taking a CBCT?

Answer 7

Localisation of unerupted tooth
Assessment of resorption from unerupted tooth
Cleft palate
Orthognathic surgery assessment

Question 8

What field of vision should dental practices use?

Answer 8

Small

Question 9

What does the unit mA stand for and what does it represent?

Answer 9

Milliamperes, represents the amount of current passed through the x-ray tube

Question 10

What is spatial resolution?

Answer 10

The number of pixels utilised in construction of an image

Question 11

What does field of view mean (FOV)?

Answer 11

The open, observable area a person can see through their eyes or via an optical device, such as a camera

Question 12

what is the benefit of taking an I-CAT panoramic scan?

Answer 12

Allows you to take complete 3D images at a radiation dose comparable to a 2D panoramic image