Table 1 Five-point scale for subjective rating of transient interruption of contrast (TIC)
Scale and score | Description of TIC |
|---|---|
1 | Severe, making CTPA nondiagnostic |
2 | Important, limiting the study although a PE diagnosis can eventually be made |
3 | Evident, with no significant reduction in the quality of the study |
4 | Visible, with slight visual differences but no effect on diagnostic accuracy |
5 | Not visually apparent, defined only by HU measurement differences greater than 10 HU |