| Value | Code Name | Code | Code System | Code Description |
|---|---|---|---|---|
| Collateral | Collateral | Collateral | ||
| Reduced upstroke | Reduced upstroke | Reduced upstroke | ||
| Reduced pulsatility index (Pi) | Reduced pulsatility index (Pi) | Reduced pulsatility index (Pi) | ||
| VMR | VMR | VMR | ||
| Reduced velocity | Reduced velocity | Reduced velocity |