CT scanner dose descriptors
CTDI100,w (mGy) - absorbed dose
- single slice measurement that represents the localised dose from a multiple slice examination
CTDIvol (mGy) - organ dose
- CTDI100 averaged over scan plane and z-axis
DLP (mGy.cm) - ‘effective dose’
- average dose x length irradiated
- ‘risk’ in terms of all radiation given
- but no tissue sensitive factors