If the patient is not ambulatory:
(a) Enter the treatment room, but avoid exposure to the useful beam.
(b) Pull the treatment table as far away from the useful beam as
Transfer the patient to a stretcher and remove him from the room.
Close the door.
Turn off the main switch at the control panel.
Notify the radiation therapist and radiation protection officer.
(1) Secure a portable survey meter. Check to see that the meter is
Turn the power on and open the door a few inches.
(3) Stand behind the door and insert the survey meter into the door opening
to test whether, in fact, the source is still in the "ON" position.
(4) If the source is still "ON," enter the room and manually turn the source
"OFF" as indicated by the manufacturer's instructions. Avoid intercepting the useful
beam with any part of your body.
Adjust the limiting diaphragms to the smallest field size.
(6) Close the door to the treatment room. Turn off the power. Lock the
control panel. Post a sign warning people not to enter.
Notify the equipment manufacturer's representative.
The emergency procedure above is based on "Medical X-Ray and Gamma-
Ray Protection for Energies up to 10 MeV," (NCRP Report Number. 33,
End of Appendix