Final answer:
The warm zone aims to reduce radiation exposure by limiting time near the source and increasing distance from it. For therapies, targeted techniques are used to focus high doses on tumors, maintaining a higher therapeutic ratio and sparing normal tissue.
Step-by-step explanation:
The goal of the warm zone for patients who have had radiation exposure is to minimize the risks and damage associated with the exposure. The strategy involves two key aspects: firstly, limiting the time of exposure to radiation, as the less time one spends exposed, the smaller the dose received; and secondly, increasing the distance from the radiation source, as this helps reduce the intensity of radiation encountered. However, in the case of therapies such as radiotherapy, the intent is to deliver high doses of radiation to tumors while sparing normal tissues as much as possible, hence techniques like geometrically targeted radiation beams and accelerator-produced particle beams amplify the therapeutic ratio, focusing the treatment and protecting non-cancerous cells.