The present invention provides a radioactivity management system for managing the radioactivity of a radioactive pharmaceutical product administered to a subject in a nuclear medicine examination facility 3 in which the radioactive pharmaceutical product, provided from a manufacturing facility of said radioactive pharmaceutical product, is injected into the subject, and which includes an image capturing device 10 for generating image data by detecting radiation emitted from the subject. In the system, a reading unit 340 reads, from a recording medium attached to the radioactive pharmaceutical product supplied from the pharmaceutical manufacturing facility to the nuclear medicine examination facility 3, radioactive pharmaceutical product information including the date and time of manufacture of the radioactive pharmaceutical product, the type of the radioactive isotope, and a value of the radioactivity of the radioactive pharmaceutical product at the time of manufacture, and a computing unit 320 calculates the value of the radioactivity of the radioactive pharmaceutical product injected into the subject on the basis of the radioactive pharmaceutical product information, the date and time at which the radioactive pharmaceutical product was injected into the subject, and the radioactivity half-life. By means of this configuration, an accurate value of the radioactivity of the radioactive pharmaceutical product injected into the subject during the nuclear medicine examination can be ascertained.本發明係一種放射能管理系統,其於包括攝影裝置10的核醫學檢査設施3中,對投與至被檢體中之放射性藥品之放射能加以管理,上述攝影裝置10將由放射性藥品之製造設施所提供之放射性藥品注入至被檢體中,檢測由該被檢體放射之放射線而生成影像資料。該系統中,讀取部340從由藥品製造設施向核醫學檢査設施3提供之放射性藥品所附帶之記錄媒體中,讀取包含該放射性藥品之製造日期時間、放射性同位素之種類以及放射性藥品之製造時之放射能之值的放射性藥品資訊,運算部320基於該放射性藥品資訊、對被檢體注入放射性藥品之日期時間、以及放射能之半衰期,來算出注入至被檢體中之放射性藥品之放射能之值。藉由上述構成,可把握於核醫學檢査中注入至被檢體中之放射性藥品之放射能之準確值。