Indium-111 is a radioactive [[isotope]] of indium. It decays by electron capture to stable cadmium-111 with a half-life of 2.8 days. Indium-111 chloride solution is produced by proton irradiation of a cadmium target in a cyclotron, as recommended by International Atomic Energy Agency.
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For [[acromegaly]]:  [[SPECT]] imaging 4 and 24 hours after injection with 6.5 [[mCi]] of [[indium-111]] OctreoScan, a [[somatostatin receptor]] imaging agent.