It is true that this is an area that is booming. Contrary to what some may think, this research does not deal exclusively with positron-emitting isotopes, but of course with simple photon-emitting isotopes as well, including technetium. Moreover, a significant part of this research is translational and consists of converting molecules so that they can be used with a technetium marker.
Currently, it is true that the arrival of PET technology on the international market and for clinical use has resulted in a boom in research in this area. What are the leading-edge countries? From a pharmaceutical perspective, they are clearly the industrialized countries. It is true that North America, the United States and Canada, Europe, Japan and Korea are clearly leading-edge countries in terms of radiopharmaceutical development. However, upstream, as far as research into radioactivity properly speaking is concerned, it is clear that the nations I mentioned earlier on in my comments, North America and Europe, are much further ahead in the forefront.