(Nuclear medicine scintigraphy). I will occasionally request this investigation either in the presence of infection or when questioning whether an implant is loose. The study involves injection of a labelled substance into your blood that then binds to areas of increased bone activity as well as tissue swelling. The images obtained then show “hot areas” that can signify activity that correlates with your symptoms. It is not dangerous and despite the nuclear in the title puts the patient at no risk.