Which of the following is not a key safety precaution when moving x-ray equipment?

Calculating radiation dose beforehand pertains more to patient safety and radiation management rather than the physical safety precautions involved in moving x-ray equipment. When moving x-ray equipment, key safety measures include ensuring that the equipment is properly prepared and that the environment around the equipment is safe and free of obstructions.

For instance, securing the footboard ensures that the equipment does not move unexpectedly, checking that the table space is clear helps prevent accidents when maneuvering the equipment, and verifying that shoulder guards are secure protects the operator and patients from potential hazards during operation. The focus on moving x-ray equipment emphasizes physical safety over calculations related to radiation dose. Thus, the correct answer highlights a concept that is not directly tied to the immediate physical safety precautions taken during the movement of x-ray machines.