Dual-energy computed tomography using a gantry-based preclinical cone-beam microcomputed tomography scanner

Area of Science:

• Medical Imaging
• Materials Science
• Biotechnology

Background:

• Dual-energy microcomputed tomography (DECT) offers quantitative material analysis for complex 3D tissue visualization.
• Implementing DECT on preclinical cone-beam micro-CT scanners faces challenges in image quality due to spectral shaping and artifact reduction.

Purpose of the Study:

• To present a method for fabricating customized X-ray filters for spectral shaping in DECT.
• To implement and evaluate a DECT system on a preclinical gantry-based cone-beam micro-CT scanner.

Main Methods:

• Fabrication of custom X-ray filters (shape and elemental composition) for spectral shaping.
• Utilized fiducial markers for accurate co-registration of low- and high-energy image volumes.
• Automated the DECT acquisition process using a motorized filter-exchange mechanism.

Main Results:

• Successfully designed and implemented a DECT system on a preclinical cone-beam micro-CT scanner.
• Demonstrated the effectiveness of customized filters and automated co-registration for improved image quality.
• Enabled quantitative material decomposition and enhanced 3D tissue visualization.

Conclusions:

• The developed DECT system provides a viable method for enhanced preclinical imaging.
• Customized spectral shaping and artifact elimination are crucial for optimal DECT performance.
• This approach facilitates automated segmentation and visualization of complex biological tissues.