Table 7.
Total effective doses with and without application of thyroid collar (μSv)
| Machine | No collar | One collar | Two collars |
| OP200 | 10.73 | 10.26 | 9.89 |
| Orthophos CD | 14.33 | 14.93 | 14.52 |
| Orthophos XG plus | 19.06 | 12.79a | 13.53a |
| ProMax® | 26.26 | 22.71a | 23.49a |
a
Significant differences between doses obtained with and without the use of the thyroid collar(s).
Orthopantomograph OP200 is manufactured by Instrumentarium Dental, Tuusula, Finland; Orthophos CD by Sirona Dental Systems GmbH, Bensheim, Germany; Orthophos XG plus by Sirona Dental Systems GmbH; and ProMax by Planmeca Oy, Helsinki, Finland.