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Iodine-124 (T 1/2 = 4.18 d) is an important radionuclide for preclinical research in positron emission tomography (PET). We describe an improved method to produce and extract 124 I from a solid [ 124 Te]TeO 2 target efficiently using the dry distillation technique. Our process is based on remote hot cell handling and was optimised to achieve efficiencies better than 90% with an average thick target yield of 9.0 ± 1.0 MBq/µAh (n = 47, corrected for decay). The technology is safe and reduces the dose to the operator.