The present invention relates to the use of a compound of formula (I): in whichR1 represents a radionuclide, Ar represents an aromatic nucleus, m is an integervarying from 2 to 4, R2 and R3 represent, independently of one another, a hydrogenatom, a (C1-C6)alkyl group, a (C1-C6)alkenyl group or an aryl group chosen froma phenyl, benzyl, imidazolyl, pyridyl, pyrimidinyl, pyrazinyl, indolyl, indazolyl,furyl and thienyl group, and their addition salts with pharmaceutically acceptableacids, in the preparation of a radiopharmaceutical composition intended forthe diagnosis and/or treatment of melanoma.
