Radiation Exposure Deriving from Patients Treated with ¹⁶⁵Dy-Ferric Hydroxide

Abstract

In radiation synovectomy 1–10 GBq Dysprosium-165 ferric hydroxide is injected into the joints. To estimate the radiation exposure of persons in the neighbourhood of the patients measurements of the dose rates were performed in 5cm, 0.5m, lm and 2m distance of the surface of the treated joints (knees) until 200 min after the application. The highest doses were estimated for the fingers of the technologist (212μSv) and for the physician (550μSv). In order to reduce the doses we constructed special shieldings for the syrings. The whole body doses were 79 μSv for the technologist and 24 μSv for the physician. After the discharge to a ward or at home other persons in lm distance from the patients can receive 72 μSv, which is 4.8% of the permissible dose.