How might doses be higher with multi-slice?
More CT scans likely to be performed because of the greater range of scanning capabilities
- ? increase in overall dose burden
Use of CT for screening
- e.g. lung cancer and colon cancer screening in high-risk groups
Greater use of narrow slices
- need higher mA to keep noise acceptable (partly offset by improved contrast due to less partial volume effect)
- doses higher for narrow collimations because of beam penumbra