Introduction to the Fourth Volume
For the first time, a Handbook of Nuclear Chemistry systematically and comprehensively acknowledges the various aspects of radiopharmaceutical chemistry. It thus reflects the significant progress that has been made over the last decades leading to the establishment of an independent field of modern science. The development of radiopharmaceutical chemistry was, nevertheless, a century-long route. It is paved by persons, their ideas and scientific results, being of historical dimensions.