Compton scatter imaging of transverse sections: corrections for multiple scatter and attenuation

Area of Science:

• Medical physics
• Radiological imaging
• Photonics

Background:

• Electron density measurement is crucial for diagnostic applications like bone and lung imaging.
• Compton scatter techniques offer a non-invasive method for determining electron density.
• Previous applications in tomography have faced limitations, necessitating further investigation.

Purpose of the Study:

• To investigate the physics of Compton scatter tomography, focusing on transverse section scanning.
• To identify and address the primary limitations of Compton scatter techniques in imaging.
• To propose corrective procedures for enhancing the accuracy of scatter-based imaging.

Main Methods:

• Examining the physics of Compton scatter tomography for transverse scanning.
• Analyzing photon attenuation and multiply-scattered photon contamination.
• Developing and applying corrective procedures to address identified limitations.

Main Results:

• The study analyzed the physics of Compton scatter tomography with a focus on transverse scanning.
• Key limitations, including photon attenuation and scatter contamination, were investigated.
• Corrective procedures were proposed and tested on a simple phantom.

Conclusions:

• Compton scatter tomography can be used to determine tissue electron density.
• The proposed methods address limitations of photon attenuation and scatter contamination.
• Transverse images with approximately 5% electron density precision are achievable.