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Published on: February 20, 2021
[Research on the shielding evaluation method for medical X-ray imaging facilities]
Hisateru Ohba1, Toshioh Fujibuchi, Sohgo Mita
1Hirosaki University Graduate School of Health Sciences, Japan.
This study verified the shielding evaluation method for computed tomography (CT) facilities using National Council on Radiation Protection and Measurements Report No. 147. Findings suggest its core concepts are applicable in Japan, despite minor discrepancies in scatter fraction data.
Area of Science:
- Medical Physics
- Radiation Protection
- Diagnostic Imaging
Context:
- Medical X-ray imaging facilities require robust radiation shielding protocols.
- National Council on Radiation Protection and Measurements (NCRP) Report No. 147 provides updated shielding evaluation methods.
- International Commission on Radiological Protection (ICRP) Publication 60 influences radiation protection standards.
Purpose:
- To verify the shielding evaluation method for medical X-ray imaging facilities outlined in NCRP Report No. 147.
- To compare radiation protection goals between NCRP Report No. 147 and Japanese standards.
- To assess the accuracy of NCRP Report No. 147's shielding method for computed tomography (CT) installations.
Summary:
- The study evaluated NCRP Report No. 147's shielding method for CT scanners using ImPACT 2006 data and manufacturer manuals.
- A comparison revealed the CT scatter fraction for a body phantom in NCRP Report No. 147 was approximately 10% lower than computed values.
- The fundamental radiation protection concepts from NCRP Report No. 147 are deemed applicable to shielding evaluations in Japan.
Impact:
- Provides insights into the practical application and validation of NCRP Report No. 147's shielding guidelines for CT facilities.
- Highlights potential discrepancies in scatter fraction data, informing future refinements of shielding methodologies.
- Facilitates the adoption and adaptation of international radiation protection standards in different regulatory environments, such as Japan.
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