Table 5.
Normalised scatter air kerma measurements at different distances from an anthropomorphic phantom for the standard technique for an erect and supine chest X-ray using a maximum 120 kV
| Measurement direction | Scatter air kerma (µGy/mAs) | |||||
|---|---|---|---|---|---|---|
| Erect | Supine | |||||
| 1 m | 2 m | 3 m | 1 m | 2 m | 3 m | |
| Side scatter | 0.16 | 0.03 | 0.02 | 0.23 | 0.07 | 0.03 |
| 45 degrees | 0.14 | 0.04 | 0.02 | 0.31 | 0.08 | 0.03 |
| Back scatter | 0.06 | 0.03 | NA | 0.27 | 0.06 | NA |
| Forward scatter | 0.25 | 0.06 | NA | 0.27 | 0.07 | 0.03 |
Due to the room set-up measurements in some directions could not be made at 3 m