Principles of CT

Question 1

Why do we need advanced imaging?

Answer 1

Allows us to view ‘slices’

Question 2

How does CT work?

Answer 2

○ Radiographic tube head and receiver spin around patient during imaging producing multiple individual x-rays in multiple orientations
○ Computer reconstructed into 3D dataset allowing production of slice images
○ Negative image dependent on radiodensity of tissues

Question 3

Problems with CT

Answer 3

Radiation dosing (ionsising radiation)
Relatively poor soft tissue resolution

Question 4

Wha do we use CT for?

Answer 4

Visualising bones