Non-invasive diffuse correlation tomography reveals spatial and temporal blood flow differences in murine bone...

Area of Science:

• Biomedical Engineering
• Regenerative Medicine
• Surgical Innovation

Background:

• Bone graft healing is critical for skeletal reconstruction.
• Assessing bone graft healing non-invasively remains a challenge.
• Understanding blood flow dynamics is key to graft success.

Purpose of the Study:

• To monitor longitudinal blood flow in murine bone grafts non-invasively.
• To evaluate diffuse correlation tomography (DCT) for assessing bone graft healing.
• To correlate blood flow patterns with graft healing outcomes.

Main Methods:

• Utilized diffuse correlation tomography (DCT) with a scanning setup and non-linear reconstruction.
• Integrated micro-computed tomography (micro-CT) for anatomical information.
• Performed weekly *in vivo* blood flow measurements in murine bone grafts.

Main Results:

• Successfully healing autografts showed localized and consistent blood flow changes.
• Poorly healing allografts exhibited heterogeneous blood flow and high variability.
• Allografts with engineered periosteum displayed intermediate blood flow responses.

Conclusions:

• Spatiotemporal blood flow monitoring can differentiate bone graft healing degrees.
• DCT offers a non-invasive method for assessing bone graft viability.
• Blood flow patterns provide insights into the healing process of bone grafts.