n as an imaging enhancing agent and the compound is present is an amount sufficient to enhance a single-photon emission computed tomography (SPECT) image, a computer assisted tomography (CAT) image, a magnetic resonance spectroscopy (MRS) image, a magnetic resonance imaging (MRI) image, a positron emission tomography (PET) image, a fluorescence image (FI) applicable or an x-ray (XR) image.Yet anot