Multi-physical field imaging method and system based on PET-CT and DAS

US11965995B2 · kind B2 · utility

Inventors

• Yibo Wang · Shanghai, CN
• Zizhuo Ma · Beijing, CN
• Yikang Zheng · Beijing, CN
• Shaojiang Wu · Beijing, CN
• Qingfeng Xue · Xi'an, CN

Key dates

• Filing date: May 22, 2023
• Grant date: Apr 23, 2024
• Expiry date: May 22, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2291/0256
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Embodiments of the present disclosure provide a multi-physical field imaging method based on PET-CT and DAS, comprising: wrapping distributed acoustic sensors on a surface of a non-metallic sample to be tested, and then placing them in a pressure device; loading triaxial pressures; preparing a tracer fluid; pumping the tracer fluid into the non-metallic sample; collecting PET images and CT images of internal structure of the non-metallic sample, meanwhile, monitoring internal acoustic emission events of the non-metallic sample in real time; combining the PET images with the CT images, to obtain PET/CT images; locating the acoustic emission events, and obtaining occurrence time and spatial location of internal structural perturbations; and analyzing a mechanism of fluid-solid coupling effect in the non-metallic sample under loaded stress. The imaging method and system of the present disclosure can accurately and reliably image the fluid-solid coupling process in the material.