Table 2 List of the risk metrics.
Metric | Name | Description | Unit |
|---|---|---|---|
\({E}_{DLP}\) | DLP-based effective dose | Effective dose to a reference phantom based on CT radiation output and pre-calculated coefficients1 | mSv |
\({E}_{OD}\) | Organ dose-based effective dose | Effective dose based on patient organ doses for a specific imaging condition6 | mSv |
\(RI\) | Risk index | Risk index based on patient organ doses for a specific imaging condition13 | Number of cancers per 100 patients |
\({RI}_{rp}\) | Risk index for a reference patient | Risk index for 35 year old patient undergoing the same exam13 | Number of cancers per 100 patients |
\(f\) | f-factor | Risk index to relative effective dose conversion factor: \(f=\frac{RI}{{RI}_{rp}}\) | Dimensionless |
\({E}_{r}\) | Relative effective dose | Effective dose based on patient organ doses for a specific imaging condition and adjusted for a factor that incorporates age- and sex- specific risk10 | mSv’ |
