[Radiation doses deriving from patients treated with (166)Ho-ferric hydroxide].
OBJECTIVE
To estimate radiation doses deriving from patients treated with (166)Ho ferric hydroxide.


METHODS
For radiation synoviorthesis about 900 +/- 100 MBq (166)Ho ferric hydroxide was injected into the knee joint of 16 patients. To estimate the radiation exposure of persons in the neighbourhood of the patients measurements of the dose rates were performed at 0.5 m, 1 m and 2 m distance of the treated joint 10 min after tracer injection. Measurements were carried out with and without radiation protection devices of the syringe.


RESULTS
The initial values of the dose rate were 11.9 micro Sv/h at 0.5 m, 3.5 micro Sv/h at 1 m and 1 micro Sv/h at 2 m distance, respectively. The whole body doses were 2.9 micro Sv for the physician and 4.6 micro Sv for the technologist. The finger doses for the technologist and the physician were ranging from 65 to 111 micro Sv. After discharge at home other persons might receive 118 micro Sv.


CONCLUSIONS
Our results, under very strict assumptions, clearly demonstrate that the calculated radiation exposure to medical and non medical personnel is well below the maximum annual dose limit. The use of any additional radiation protection device as syringe shielding does not significantly lower radiation exposure.
Preitfellner
J
J
Universitätsklinik für Nuklearmedizin, AKH Wien, Währinger Gürtel 18-20, A-1090 Wien, Osterreich. josef.preitfellner@akh-wien.ac.at
Pirich
C
C
John
P
P
Ofluoglu
S
S
Sinzinger
H
H
Havlik
E
E
D005385:Fingers; D006695:Holmium / Q000493:pharmacokinetics / Q000627:therapeutic use*; D006801:Humans; D006878:Hydroxides / Q000627:therapeutic use*; D011868:Radioisotopes / Q000493:pharmacokinetics / Q000627:therapeutic use; D011879:Radiotherapy Dosage; D014018:Tissue Distribution
D006878:Hydroxides; D011868:Radioisotopes; C483519:holmium-ferric hydroxide; D006695:Holmium