Provided is a method for imaging a renal lesion comprising the steps of administrating a nitroimidazole-based compound to a living body and obtaining an image of the renal lesion by detecting radiation non-invasively from the outside of the living body wherein the renal imaging agent comprises a defined nitroimidazole-based compound or a salt thereof. The step of obtaining the image of the renal lesion can include using positron emission tomography.
