Answer:
Some examples are:
Reducing the work hours of the doctor (at least in that area): Being exposed less time to the radiation will decrease the total dose that the doctor receives in a day, reducing the risks in a big factor.
Work at distance, in a shielded place: Working far away from the machine and in a shielded place (walls with lead for example) will reduce the total radiation that reaches the doctor, so at the end of the day, the total dose will be greatly decreased.
