The present invention relates to the field of diagnostic imaging. Specifically, the invention relates to the diagnostic imaging of diseases where specific matrix metalloproteinases are known to be involved. One embodiment of the invention is a compound having matrix metalloproteinase inhibitory activity suitable for diagnostic imaging. Also disclosed in the present invention is a pharmaceutical composition comprising the diagnostic imaging agent of the invention in a form suitable for mammalian administration. The invention furthermore discloses intermediates in the synthesis of the diagnostic imaging agents of the invention and kits for the preparation of the pharmaceutical composition of the invention. The pharmaceutical composition of the invention may be used in the diagnosis of diseases where specific matrix metalloproteinases are known to be involved.