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Related Concept Videos

High-Resolution Mass Spectrometry (HRMS)01:15

High-Resolution Mass Spectrometry (HRMS)

The resolution of a mass spectrometer depends on the efficiency of separating ions with different ion masses. The mass of an atom is approximated to the sum of the masses of protons and neutrons inside, considering the masses of protons and neutrons as equal. However, the masses of the proton (1.6726 × 10−24 g) and neutron (1.6749 × 10−24 g) are not truly equal. There is a minor error in the expression of atomic masses relative to the simplest atom of hydrogen. For example, the mass of helium...

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Related Experiment Video

Updated: May 27, 2026

Erosion Identification in Metacarpophalangeal Joints in Rheumatoid Arthritis using High-Resolution Peripheral Quantitative Computed Tomography
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Sex- and site-specific reference data for size-invariant properties using multi-stack HRpQCT.

Simone Poncioni1,2, Dominique Lüscher1, Michael Indermaur1

  • 1ARTORG Center for Biomedical Engineering Research, University of Bern, 3010 Bern, Switzerland.

JBMR Plus
|May 26, 2026
PubMed
Summary
This summary is machine-generated.

High-resolution peripheral quantitative computed tomography (HRpQCT) offers advanced bone assessment. This study introduces size-independent parameters from multi-stack HRpQCT, enhancing longitudinal bone health monitoring and fracture risk prediction.

Keywords:
HRpQCTbone strengthdistal radiusdistal tibiafinite element analysisosteoporosis

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Area of Science:

  • Orthopedics and Bone Biology
  • Medical Imaging and Diagnostics
  • Biomechanical Engineering

Background:

  • High-resolution peripheral quantitative computed tomography (HRpQCT) is an advanced imaging technique for assessing bone microarchitecture and predicting strength, surpassing traditional methods like DXA.
  • Current HRpQCT reference data, often based on single thin slices, may not fully represent clinically relevant bone regions and can be limited by size-dependent parameters, potentially masking true bone quality changes.
  • There is a need for size-independent parameters derived from multi-stack HRpQCT to improve the accuracy and sensitivity of longitudinal bone health assessments.

Purpose of the Study:

  • To establish the first age-, sex-, and site-specific reference data for novel multi-stack HRpQCT parameters at the distal radius and tibia.
  • To identify size-independent parameters that are most sensitive to age-related changes for improved bone health assessment.
  • To evaluate the utility of these parameters for refined longitudinal monitoring and fracture risk evaluation.

Main Methods:

  • Recruited 381 healthy participants (144 female, 237 male) from a predominantly Caucasian population, aged 20-92 years.
  • Acquired multi-stack HRpQCT scans at the distal radius and tibia using second-generation scanners.
  • Selected six size-independent parameters: total volumetric BMD, cortical volumetric BMD, relative cortical thickness, trabecular degree of anisotropy, trabecular bone volume over total volume, and apparent yield stress, for analysis.

Main Results:

  • Generated comprehensive age-, sex-, and site-specific reference data for multi-stack HRpQCT parameters.
  • Identified cortical volumetric BMD, particularly in the weight-bearing tibia in women, as the most sensitive size-independent parameter to age-related changes.
  • Demonstrated good agreement between single-stack and multi-stack derived densitometric and microstructural properties, supporting cross-protocol comparisons.

Conclusions:

  • Multi-stack HRpQCT provides a refined set of size-independent variables for comprehensive bone health assessment.
  • These novel parameters offer improved sensitivity for detecting age-related bone changes and enhance longitudinal monitoring capabilities.
  • The findings support the use of multi-stack HRpQCT for more accurate fracture risk prediction and personalized bone management strategies.