Abstract: The potential use of radionuclides in therapy has been recognized for many decades. A number of radionuclides, such as iodine-131 (¹³¹I), phosphorous-32 (³²P), strontium-90 (⁹⁰Sr), and yttrium-90 (⁹⁰Y), have been used successfully for the treatment of many benign and malignant disorders. Recently, the rapid growth of this branch of nuclear medicine has been stimulated by the introduction of a number of new radionuclides and radiopharmaceuticals for the treatment of metastatic bone pain and neuroendocrine and other malignant or non-malignant tumours. Today, the field of radionuclide therapy is enjoying an exciting phase and is poised for greater growth and development in the coming years. For example, in Asia, the high prevalence of thyroid and liver diseases has prompted many novel developments and clinical trials using targeted radionuclide therapy. This paper reviews the characteristics and clinical applications of the commonly available therapeutic radionuclides, as well as the problems and issues involved in translating novel radionuclides into clinical therapies.

Key words: Therapeutic radionuclide, Targeted radionuclide therapy, Radioimmunotherapy, Molecular targeting, Theranostics

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