Changes

Exposure to family members or the others who provide care to the patient is defined as medical exposures as there is direct benefits to them, but dose constraints should be established for use in defining the protection policy for visitors to patient and family members at home when a nuclear medicine patient is discharged from hospital. Such groups may include children. ICRP has not previously recommended values for such constraints, but a value of 5 mSv per episode for an adult (i.e. for the duration of a given release of a patient after therapy) is reasonable (.<ref>Radiation Dose Limits for Individual Members of the Public[https://www.nrc.gov/reading-rm/doc-collections/cfr/part020/part020-1301.html]). </ref> The constraint needs to be used flexibly. For example, higher doses may well be appropriate for the parents of very sick children or for an elderly who would like to take care of his/her sick spouse. Young children, infants, and visitors not engaged in direct comforting or care should be treated as members of the public, who are subject to the public dose limit of 1 mSv/year.