© 2018 by the Society of Nuclear Medicine and Molecular Imaging. With the increasing focus on a more personalized approach to medicine using imaging techniques to select patients for targeted treatment or theranostic strategies, interest in the development of new radionuclides is expanding. Through the development of production and radiochemistry techniques, several new radiometals are being added to the toolbox of the nuclear imaging community. 43,44g,mSc, 52gMn, and 45Ti are all emerging transition metal radionuclides and will be discussed in this short review. Each of these nuclides has unique imaging characteristics and shows promise for the development of new molecular imaging agents.