When performing mobile radiography (portable X-ray), which of the following practices is essential to minimize the technologist and other healthcare staff's radiation exposure?

Increasing the distance between healthcare staff and the patient during mobile radiography is indeed essential for minimizing radiation exposure. This practice is grounded in the principles of radiation protection, which emphasize that the intensity of radiation decreases with increased distance according to the inverse square law. The further away a person is from the radiation source, the lower the exposure they will receive, significantly reducing the potential risks associated with radiation.

By standing at a greater distance, technologists and other healthcare staff can greatly limit their exposure while still effectively conducting the imaging examination. This is particularly important in mobile settings, where control over the environment may be less optimal than in fixed radiology departments. Proper technique involving distance helps to ensure not only the safety of the technologists but also that of other individuals present in the vicinity.

In contrast, while other practices such as using appropriate kVp settings and lead aprons are also important in radiation safety, they serve different roles in the context of patient shielding or optimizing image quality rather than directly minimizing staff exposure during mobile radiography. Therefore, maintaining a safe distance is the most effective method directly impacting the radiation exposure of personnel.