Simple and efficient method for producing high radionuclidic purity 111In using enriched 112Cd target

In this work, a simple and efficient method for producing high radionuclidic purity ¹¹¹In from an enriched ¹¹²Cd target was developed. The enriched ¹¹²Cd metal target formed by cyanide-free electroplating was bombarded with protons of 21 MeV in a CS-30 cyclotron. Then, we explored a purification scheme using CL-P204 cation exchange resin wherein 98% of the ¹¹¹In in the bombarded target could be extracted in less than 1 h. The purified ¹¹¹In in the form of [¹¹¹In]In-chloride had a high radionuclidic purity (99.9%) and a low impurity concentration (<1.2 ppm). The yield of ¹¹¹In via the reaction of ¹¹²Cd (p, 2n) ¹¹¹In was measured to be 222 ± 5 MBq/μA∙h. In addition, a chemical procedure for collecting the unreacted ¹¹²Cd at a recovery rate of 96.6% was explored.

Potent candidates for Targeted Auger Therapy: Production and radiochemical considerations

Targeted Auger Therapy represents great potential for the therapy of diseases which require a high degree of selectivity on the cellular level (e.g. for therapy of metastatic cancers). Due to their high Linear Energy Transfer (LET), Auger emitters, combined with selective biological systems which enable delivery of radionuclides close to the DNA of the targeting cell, can be extremely selective and powerful treatment tools. There are two main aspects associated with the development of efficient radiopharmaceuticals based on Auger Emitters: a) the availability of suitable Auger-emitting radionuclides for therapy and b) the design of targeting vectors which can deliver Auger emitters into/close to the nucleus. In the present review, we address the first aspect by defining important parameters for the selection of radionuclides for application to Targeted Auger Therapy and form a categorized list of the most promising radionuclides, their possible production routes, and their use in the synthesis of radiopharmaceuticals.