**4. Radioactive waste**

The most commonly used radioisotopes in healthcare facilities (HCFs) are technetium mTc-99 and gadolinium Ga-68 in therapeutic generators and cobalt Co-60, iodine I-131 and iridium Ir-192 for diagnosis and treatment. Low-level radioactive wastes are mainly the waste category generated in HCFs due to the applications of radioisotopes.
