Exposure of treating physician to radiation during prostate brachytherapy using iodine-125 seeds

Schiefer, Hans and von Toggenburg, Friedrich and Seelentag, Wolf and Plasswilm, Ludwig and Ries, Gerhard and Lenggenhager, Cornelius and Schmid, Hans-Peter and Leippold, Thomas and Prikler, Ladislav and Krusche, Bernd and Roth, Jakob and Engeler, Daniel. (2009) Exposure of treating physician to radiation during prostate brachytherapy using iodine-125 seeds. Strahlentherapie und Onkologie, 185 (10). pp. 689-695.

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Official URL: http://edoc.unibas.ch/dok/A5261904

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Background and Purpose: Only sparse reports have been made about radiation exposure of the treating physician during prostate seed implantation. Therefore, thermoluminescence dosimeter (TLD) measurements on the index fingers and the backs of both hands were conducted. Material and Methods: Stranded iodine-125 seeds with a mean apparent activity of 27.4 MBq per seed were used. During application, the treating physician manipulated the loaded needle with the index fingers, partially under fluoroscopic control. Four physicians with varying experience treated 24 patients. The radiation exposure was determined with TLD-100 chips attached to the index fingertips and the backs of hands. Radiation exposure was correlated with the physician`s experience. Results: The average brachytherapy duration by the most experienced physician was 19.2 min (standard deviation sigma = 1.2 min; novices: 34.8 min [sigma = 10.2 min]). The mean activity was 1,703 MBq (sigma = 123 MBq), applied with 16.3 needles (sigma = 2.5 needles; novices: 1,469 MBq [sigma = 229 MBq]; 16.8 needles [sigma = 2.3 needles]). The exposure of the finger of the ``active hand`` and the back of the hand amounted to 1.31 mSv (sigma = 0.54 mSv) and 0.61 mSv (sigma = 0.23 mSv), respectively (novices: 2.07 mSv [sigma = 0.86 mSv] and 1.05 mSv [sigma = 0.53 mSv]). Conclusion: If no other radiation exposure needs to be considered, an experienced physician can perform about 400 applications per year without exceeding the limit of 500 mSv/year; for novices, the corresponding figure is about 200.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Hadronenphysik (Krusche)
UniBasel Contributors:Krusche, Bernd
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Urban & Vogel
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:30 Nov 2017 09:24
Deposited On:22 Mar 2012 13:57

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