The radioisotopes that are used in oncology hospitals to treat people with cancer ... as the radiation comes out of the patient’s body through diarrhea or sweating, so it requires drinking water a lot .. and also where patients lie in the hospital for two days .. And the basins in the hospital must Be highly efficient to avoid radiation leakage .. I hope to help me with more studies or research on the subject for the purpose of completing my research. Thank you very much.