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Related Experiment Video

Updated: Jun 27, 2025

Author Spotlight: Enhanced Quantification of Cardiovascular Calcification Progression for Longitudinal Micro PET/CT Studies in Small Research Animals
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Spatial Atlas for Mapping Vascular Microcalcification Using 18F-NaF PET/CT: Application in Hyperphosphatemic Familial

Aaron J Sheppard1,2, Elizabeth H Theng1,3, Sriram S Paravastu1,4

  • 1National Institutes of Dental and Craniofacial Research (A.J.S., E.H.T., S.S.P., N.M.W., I.R.H., R.I.G., K.L.R., M.T.C.), National Institutes of Health, Bethesda, MD.

Arteriosclerosis, Thrombosis, and Vascular Biology
|April 25, 2024
PubMed
Summary

A new technique uses radiolabeled sodium fluoride positron emission tomography/computed tomography to map vascular microcalcifications. This method enables precise tracking of calcification burden over time and across individuals, aiding in vascular biology research.

Keywords:
calcinosismethodspositron-emission tomographyrare diseasesvascular calcification

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Area of Science:

  • Vascular Biology
  • Medical Imaging
  • Calcium Metabolism

Background:

  • Vascular calcification is a significant cause of morbidity, often linked to calcium/phosphate imbalances.
  • Radiolabeled sodium fluoride (NaF) PET/CT is a sensitive tool for detecting and quantifying active microcalcifications.
  • Current methods lack comprehensive assessment of global and site-specific microcalcification burden.

Purpose of the Study:

  • To develop and validate a novel technique for quantifying and mapping total vasculature microcalcification.
  • To enable simultaneous assessment of global disease burden and precise tracking of microcalcifications.
  • To apply this technique to patients with hyperphosphatemic familial tumoral calcinosis.

Main Methods:

  • Utilized NaF PET/CT imaging in 4 patients with hyperphosphatemic familial tumoral calcinosis.
  • Developed a novel technique to map microcalcification scores and volumes onto a standardized vascular atlas.
  • Computed segment-wise microcalcification scores (mCSmean and mCSmax) for predefined vascular segments.

Main Results:

  • Identified distinct microcalcification patterns in patients with hyperphosphatemic familial tumoral calcinosis, with peaks near the aortic bifurcation and distal femoral arteries.
  • Detected microcalcification in a young patient with no CT-defined calcification.
  • Observed a decrease in microcalcification score after IL-1 antagonist treatment, with site-specific responsiveness noted.

Conclusions:

  • The developed technique visualizes spatial patterns of active microcalcification in peripheral vasculature.
  • It allows for precise tracking of microcalcifications across time and individuals.
  • This technique is adaptable to other vascular calcification diseases and represents an advance in vascular biology.