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Reduction of contamination risks during clinical studies with technegas
H P Vanbilloen1, J Bauwens, L Mortelmans
1Department of Nuclear Medicine, U.Z. Gasthuisberg, Leuven, Belgium.
European Journal of Nuclear Medicine
|December 14, 1999
Summary
To minimize operator contamination during Technegas procedures, equipment modifications were implemented. These adaptations significantly reduced radiation exposure, enhancing safety for healthcare professionals using this diagnostic tool.
Area of Science:
- Nuclear Medicine
- Medical Physics
- Radiation Safety
Background:
- Patient studies using Technegas equipment revealed significant contamination risks for operators and the surrounding environment.
- Sources of contamination included residual activity, crucible particles, patient-site leakage, and equipment malfunction.
Purpose of the Study:
- To investigate and mitigate contamination risks associated with Technegas equipment during patient studies.
- To implement and evaluate the effectiveness of equipment modifications in reducing operator exposure.
Main Methods:
- Replaced a malfunctioning valve within the apparatus.
- Installed a high-efficiency air exhaust pump and filter system.
- Integrated a transparent enclosure, a patient-face dome, and a mouthpiece holder to contain potential radioactive release.
Main Results:
- Post-modification studies showed no measurable contamination on operator clothing.
- Minor contamination was occasionally detected on gloves during eluate filling.
- Small contaminations (up to 9.25 kBq) were measured on operator mouthmasks, resulting in minimal effective dose equivalent (0.008 microSv/study).
- Total operator external radiation dose was 2 microSv per examination, with the highest dose rate during crucible filling (0.2 mSv/h).
Conclusions:
- The implemented equipment adaptations effectively reduced operator contamination and radiation exposure during Technegas procedures.
- Further attention to glove contamination during eluate handling is warranted.
- The modified system provides a safer environment for nuclear medicine professionals utilizing Technegas technology.