94mTc can be produced via the 94Mo(p,n)94mTc nuclear reaction [17]. Using enriched 94Mo provides a good yield with relatively low levels of impurities [18]. Thermo-chromatographic separation of Mo from 94mTc is achieved using a steam distillation method [19]. 94mTc is an attractive PET isotope (t- = 52 min) as it can po tentially be used as a substitute in the typical 99mTc-labeled single-photon-emitting radiopharmaceuticals.

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