Radiation information and informed consent for clinical trials.

Examples of the statements about the radiation from medical imaging in the information for participants provided to the Human Research Ethics Committee (HREC) for approval are presented and discussed. There is considerable scope for improvement in the information about radiation that is presented to potential participants in clinical trials. Many radiation statements seem only intended to allay fear and anxiety about radiation rather than providing accurate information. This situation cannot be said to be conducive to allowing the participant to give informed consent to their involvement in a clinical trial in which ionising radiation is used. As many clinical trials are international and conducted at many sites (sometimes over 100), we would expect the same statements to have been seen by members of HRECs in many countries. Few HRECs include a member who is an expert in radiation. Hence, to ensure that the information is sound, those sections of the participant information that refer to radiation should be written or reviewed by a specialist in radiation protection such as a medical physicist, a health physicist or a radiation safety officer.