In some locations there is considerable overlap in closely related terms, for example in many countries technologist and radiographer are synonyms, while in the United Kingdom they are considered separate professions.
[3][4] The International Atomic Energy Agency (IAEA) uses technologist primarily to refer to the staff involved in the practical clinical delivery of radiotherapy, radiology and nuclear medicine.
In X-ray radiography and radiotherapy, it is radiographers who will carry out the imaging or treatment, while technologists may be involved in equipment testing and radiation protection activities.
[14] They may be involved in preparing and injecting radiopharmaceuticals, talking to patients about their procedures, performing scans on gamma cameras and PET scanners, and quality control activities.
[24] IPEM, ART, and the Institute of Healthcare Engineering and Estate Management (IHEEM) jointly operate the Register of Clinical Technologists.