X-ray scatter in projection radiography.

Area of Science:

• Radiological Sciences
• Medical Physics
• Radiation Protection

Background:

• Projection radiography is a widely used imaging technique with implications for radiation safety.
• Both radiation workers and the public are subject to radiation exposure during radiological procedures.

Purpose of the Study:

• To measure and map scattered radiation during common projection radiography protocols.
• To estimate the effective doses received by support personnel during these procedures.
• To assess radiation safety in projection radiography.

Main Methods:

• Generated scattered radiation maps for various adult patient protocols (chest PA/lateral, pelvis AP, abdomen AP, bedside chest AP).
• Measured scattered radiation dose rates at different locations.
• Calculated effective doses for supporting individuals at specified distances.

Main Results:

• Scattered radiation maps visualized spatial dose distribution for different protocols.
• Abdomen AP protocols exhibited the highest scattered radiation rates, while bedside chest AP had the lowest.
• Effective dose for a support person was 300 nSv (abdomen AP at 0.5 m) and 0.5 nSv (bedside chest AP at 0.7 m).
• Estimated annual effective dose for an emergency unit radiographer was 0.11 mSv.

Conclusions:

• The measured effective doses for support personnel are significantly lower than annual dose limits.
• Radiation safety measures in projection radiography are effective in protecting staff and the public.
• Scattered radiation mapping provides valuable insights for optimizing radiation protection strategies.