You are performing anesthesia for a patient undergoing an interventional radiology procedure and are standing 1m from the radiation source. Which of the following will provide the GREATEST protection from ionizing radiation?

The use of radiography in the OR and in remote locations has been rapidly increasing. The use of this equipment increases the anesthesiologist's exposure to ionizing radiation (X-rays). Exposure for the anesthesiologist can come from direct exposure to the radiation beam, and more commonly from scatter that is reflected off the patient and surrounding equipment (Figure).

Distance is the best method for reducing radiation exposure. Radiation follows the inverse square law, such that doubling the distance between the caregiver and the radiation source reduces the radiation exposure by a factor of four. At least 1m between the caregiver and the radiation source/patient is recommended whenever...

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