Patent ID: 7118731

Claim:
A method for diagnosis of tissue proliferation activity comprising: administering an effective amount of an agent for diagnosis of tissue proliferation activity to a mammal, said agent comprising, as an active ingredient, a radiolabeled compound as represented by the following formula or a pharmaceutically acceptable salt thereof: wherein R 1 denotes hydrogen, or a linear- or branched-chain alkyl group having 1–8 carbon atoms; R 2 denotes hydrogen, hydroxyl, or a halogen substituent; R 3 denotes hydrogen or a fluorine substituent, R 4 denotes oxygen, sulfur or a methylene substituent, and R 5 denotes a radioactive halogen substituent, excluding the case where R 1 is hydrogen and R 4 is oxygen, and imaging in vivo the distribution of said agent, wherein said diagnosis of tissue proliferation activity is a diagnosis for hyperplasia, tissue regeneration, tissue transplantation or viral infection accompanied by abnormal proliferation.