Personal dosimetry in the PET Centre Prague

Area of Science:

• Nuclear Medicine
• Radiation Protection
• Medical Physics

Background:

• The PET Centre Prague monitors occupational radiation doses for personnel working with positron emission tomography (PET) equipment.
• Understanding dose trends is crucial for ensuring safety in nuclear medicine facilities.

Purpose of the Study:

• To present personal year dose equivalents for physicians, technologists, and lab-technologists at PET Centre Prague from 1997-2000.
• To analyze the impact of PET scanner installation and subsequent safety measures on occupational radiation exposure.

Main Methods:

• Collected and analyzed personal dosimetry data for different professional groups.
• Calculated collective, mean, and maximum dose equivalents, along with the number of individuals in each group.
• Conducted radiation field measurements to assess dose rates outside controlled areas.

Main Results:

• A notable increase in dose equivalents was observed in 1999 following the installation of the PET scanner.
• Subsequent implementation of personnel training and enhanced local shielding mitigated further dose increases, even with doubled patient throughput.
• Radiation levels outside the controlled area remained at background levels (0.17-0.18 mSv/hour).

Conclusions:

• Effective radiation protection strategies, including training and shielding, are vital for managing occupational doses in PET facilities.
• The study demonstrates that increased operational demands in PET centers can be safely managed with appropriate radiation safety protocols.
• External radiation levels were maintained within acceptable limits, indicating successful containment of radiation.