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METHOD FOR OCCUPATIONAL SKIN DOSE ESTIMATION IN UPPER EXTREMITY 131I-MIBG CONTAMINATION
Dennise Magill1, Natalie Beckmann1, Marc Felice1
1Environmental Health & Radiation Safety, University of Pennsylvania, 3160 Chestnut Street, Suite 400, Philadelphia, PA, USA.
Radiation Protection Dosimetry
|February 13, 2018
Summary
Nuclear medicine staff handling radioactive iodine-131-Metaiodobenzylguanidine (MIBG) therapy can have skin contamination. A new method rapidly estimates radiation dose to the skin of the upper extremities from contamination measurements.
Area of Science:
- Nuclear Medicine
- Radiation Safety
- Medical Physics
Background:
- Nuclear medicine and radiation safety staff can experience skin contamination during therapeutic procedures.
- Iodine-131-Metaiodobenzylguanidine (MIBG) therapy involves handling radioactive isotopes, posing potential exposure risks.
- Accurate assessment of skin dose is crucial for occupational health and safety in nuclear medicine.
Purpose of the Study:
- To present a methodology for rapid assessment of upper extremity skin radiation dose.
- To derive a conversion factor for estimating skin dose from contamination measurements.
- To provide an early projection of radiation dose to staff during MIBG therapy.
Main Methods:
- Retrospective analysis of skin contamination data from nuclear medicine staff.
- Development of a conversion factor (XE) relating contamination measurements to estimated skin dose (DE).
- Inclusion of factors like radioactive decay and decontamination in dose estimation.
Main Results:
- A conversion factor (XE) was derived to estimate skin dose from initial contamination measurements.
- The methodology accounts for radioactive decay, decontamination, and skin sloughing.
- An early dose projection is estimated at <0.10% mSv per count per minute (cpm) of initial contamination.
Conclusions:
- A rapid and reliable method for assessing upper extremity skin dose from MIBG therapy contamination is established.
- The derived conversion factor allows for early estimation of occupational radiation exposure.
- This methodology supports effective radiation protection for nuclear medicine personnel.
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