New Delhi: The war in Ukraine has snapped imports of a key radioactive isotope used in advanced cancer treatment, prompting top medical institutions in the country to look for less effective alternatives. For more than a year, there has been no import of Actinium-225, which used to come from Russia via Germany, said Dr C.S. Bal, head of the department of nuclear medicine at New Delhi’s All India Institute of Medical Sciences (AIIMS). Although Actinium-225 is found in nature, nuclear facilities and technology are required to separate it from other isotopes and obtain a sizable purified amount. “Actinium is not...