Quantitative gamma-ray imaging with coded aperture method.

Area of Science:

• Nuclear Engineering
• Radiation Detection and Imaging
• Applied Physics

Background:

• Quantitative intensity measurement of radioactive materials is crucial for applications like nuclear security and facility decommissioning.
• Conventional coded aperture techniques face challenges in real-time, multi-sensor data fusion and noise resistance.

Purpose of the Study:

• To develop a multi-sensor radiation imaging system for simultaneous, real-time intensity and distribution measurement of radioactive sources.
• To demonstrate the noise-resistant capabilities of the quantitative gamma-ray imaging technique in complex radiation environments.

Main Methods:

• Implementation of a multi-sensor system fusing gamma-ray images, optical pictures, and 3D point clouds.
• Utilizing a mask-antimask coded aperture approach for quantitative intensity measurement.
• Experimental validation using point-like sources and nuclear power plant scenarios.

Main Results:

• Simultaneous and real-time acquisition of radioactive source intensity and distribution without mobile platforms.
• Demonstrated exceptional noise resistance of the quantitative gamma-ray imaging technique against interfering radiation.
• Successful application in realistic nuclear power plant scenarios.

Conclusions:

• The developed multi-sensor system provides a promising solution for real-time radioactive source characterization.
• The quantitative gamma-ray imaging technique exhibits significant potential for upgrading existing coded aperture cameras.
• The approach enhances possibilities for widespread coded aperture applications in nuclear safety and security.