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ASSESSMENT OF INTEGRITY AND LEAD-EQUIVALENCE OF SHIELDED GARMENTS USING TWO-DIMENSIONAL X-RAY IMAGES FROM A COMPUTED
T Kairn1,2,3,4, S K Maxwell1, J V Trapp2
1Cancer Care Services, Royal Brisbane and Women's Hospital, Butterfield St, Herston 4029, Qld, Australia.
Radiation Protection Dosimetry
|April 6, 2021
Summary
A new computed tomography (CT) topogram method efficiently verifies shielded garment integrity for radiation protection. Most garments met lead-equivalence standards, with CT results matching conventional measurements.
Area of Science:
- Medical Physics
- Radiological Protection
- Imaging Technology
Background:
- Shielded garments are crucial for occupational radiation protection in radiology.
- Ensuring the integrity and lead-equivalence of these garments is vital for safety.
- Conventional verification methods can be time-consuming and resource-intensive.
Purpose of the Study:
- To introduce and evaluate a novel method for verifying shielded garment integrity.
- To simultaneously measure lead-equivalence using computed tomography (CT) topogram images.
- To compare this novel CT-based method with conventional measurement techniques.
Main Methods:
- Twelve shielded garments with lead-free materials were tested.
- A novel method utilized 2D topogram images from CT scanners.
- Conventional measurements used superficial and orthovoltage radiotherapy beams for comparison.
Main Results:
- All garments generally met specified lead-equivalence for fluoroscopy energies, except three skirts needing double layering.
- CT topogram measurements correlated well with, or were more conservative than, kV narrow-beam results.
- Some energy-dependent variations in results were observed.
Conclusions:
- The CT topogram method offers an efficient way to assess shielded garment integrity and lead-equivalence.
- This technique is suitable for evaluating new garments and for annual checks of existing ones.
- The method provides reliable data for ensuring radiation protection standards are met.
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