Artificially introduced into the environment 90Sr is highly radiotoxic, so its content levels in foodstuff and biota require constant monitoring for radiological protection. Most analytical procedures used for 90Sr determination are time-consuming, and therefore, a faster approach is needed. Employing the Bateman equation enables more effi cient exploitation of the secular equilibrium between 90Sr and its daughter radionuclide 90Y in the calculations. This article describes a method for computing the 90Sr activity concentration, while accounting for 90Y activity. The developed approach was tested and validated in terms of its applicability in everyday analysis.
Radioisotope synovectomy is based upon an yttrium-90 colloid injected into the knee joint (the usual injected activity ranges from 111 MBq to 222 MBq per joint). Execution of the procedure needs participation of a nuclear medicine specialist as well as an orthopedist or a rheumatologist and a technologist who prepares radiopharmaceuticals. All of these participants are exposed to ionizing radiation. The ionization doses for patients and personnel are dependent not only on the activity injected, but also on the method and process of injection as well as the radioactivity measurement procedure used. In the experiments performed, a significant influence of the biodistribution of the radioisotopic substance on the exposure results has been observed.
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.