Procédures de ventilation pulmonaire par aérosol Tc-DTPA : contamination aérienne, contaminations interne et cutanée externe des manipulateurs |
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Authors: | N Leners C Sinnen O Kaphammel A Schreiner C Als |
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Institution: | aService de médecine nucléaire, Zithaklinik, 2763 Luxembourg;bCellule de physique médicale, EHL, 8070 Bertrange, Luxembourg;cDivision de la radioprotection, ministère de la Santé, 2120 Luxembourg |
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Abstract: | Efficiency of an optimization procedure of radiation protection measures with lung ventilation by 99mTc-DTPA aerosol was evaluated by measuring airborne radioactivity and by looking for external and internal contaminations of technologists. Despite numerous precautions, small amounts of radioactivity were airborne in 71.4% of procedures and a small internal contamination of technologists (1.6–881 Bq; median: 36.3 Bq) was found. The latter was highest in case of deficient patient collaboration and with technical incidents. A very low external contamination (0.1-29.1 Bq; median: 0.1 Bq) was demonstrated with 82% of procedures. Estimated effective doses by internal contamination (0.01-6.2 nSv; median 0.3 nSv) was minimal compared with the maximal legally admissible doses for professionally exposed workers (10 mSv/year); it does not represent an excessive irradiation risk. |
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Keywords: | Mots clé s: Contamination Exposition radioactive Radioprotection Ventilation pulmonaire Aé rosol de 99mTc-DTPA |
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