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Updated: Jul 15, 2026
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Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population
Published on: January 31, 2025
Noninvasive optical detection of bone mineral
Kenneth M Kozloff1, Ralph Weissleder, Umar Mahmood
1Center for Molecular Imaging Research, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA.
Summary
Far-red fluorescent pamidronate (FRFP) binds to bone mineral, enabling noninvasive in vivo imaging of bone formation and resorption. This fluorescent probe visualizes bone metabolism in animal models, aiding disease diagnosis.
Area of Science:
- Biomedical Imaging
- Skeletal Biology
- Pharmacology
Background:
- Near-infrared optical markers are crucial for early disease diagnosis by reporting on bone metabolism.
- Fluorescently tagged bisphosphonates visualize bone formation and resorption sites.
- This study investigates a fluorescently labeled pamidronate probe for in vivo bone imaging.
Purpose of the Study:
- To evaluate the in vivo binding of a far-red fluorescent pamidronate (FRFP) probe to bone.
- To assess FRFP's ability to visualize bone formation and resorption in animal models.
- To explore the potential of FRFP for noninvasive assessment of bone metabolism.
Main Methods:
- In vitro assessment of FRFP binding to mineralized dentine.
- In vivo studies in neonatal mice, bone healing models, and osteolysis models.
- 3D fluorescence molecular tomographic (FMT) imaging for deep tissue visualization.
Main Results:
- FRFP binds to bone mineral, with binding dependent on mineral quantity.
- In vivo, FRFP localizes to osteoblastic, osteoclastic, and quiescent bone surfaces.
- Vascular delivery influences FRFP accumulation; FMT imaging visualizes bone formation but not pure osteolysis.
Conclusions:
- FRFP can serve as a biomarker for bisphosphonate deposition and drug-target interactions.
- FRFP holds potential for noninvasive assessment of local bone metabolism in vivo.
- Combination with other imaging agents or fluorescent cells may enhance diagnostic capabilities.
