Osteoporosis International

, Volume 25, Issue 5, pp 1595–1606

Accuracy of trabecular structure by HR-pQCT compared to gold standard μCT in the radius and tibia of patients with osteoporosis and long-term bisphosphonate therapy

Authors

  • M. Krause
    • Department of Osteology and BiomechanicsUniversity Medical Center Hamburg-Eppendorf
    • Department of Trauma and Reconstructive SurgeryAsklepios Clinic St. Georg
  • O. Museyko
    • Institute of Medical PhysicsUniversity of Erlangen-Nuernberg
  • S. Breer
    • Department of Osteology and BiomechanicsUniversity Medical Center Hamburg-Eppendorf
  • B. Wulff
    • Department of Legal MedicineUniversity Medical Center Hamburg-Eppendorf
  • C. Duckstein
    • Department of Osteology and BiomechanicsUniversity Medical Center Hamburg-Eppendorf
  • E. Vettorazzi
    • Department of Medical Biometry and EpidemiologyUniversity Medical Center Hamburg-Eppendorf
  • C. Glueer
    • Section Biomedical Imaging, Department of Diagnostic RadiologyUniversity Hospital Schleswig-Holstein
  • K. Püschel
    • Department of Legal MedicineUniversity Medical Center Hamburg-Eppendorf
  • K. Engelke
    • Institute of Medical PhysicsUniversity of Erlangen-Nuernberg
    • Department of Osteology and BiomechanicsUniversity Medical Center Hamburg-Eppendorf
Original Article

DOI: 10.1007/s00198-014-2650-4

Cite this article as:
Krause, M., Museyko, O., Breer, S. et al. Osteoporos Int (2014) 25: 1595. doi:10.1007/s00198-014-2650-4

Abstract

Summary

Despite an increasing use of high-resolution peripheral quantitative computed tomography (HR-pQCT) to evaluate bone morphology in vivo, there are reservations about its applicability in patients with osteoporosis and antiresorptive therapy. This study shows that HR-pQCT provides acceptable in vivo accuracy for bone volume fraction (BV/TV) in patients with osteoporosis and bisphosphonate (BP) treatment.

Introduction

The primary aim was to analyze agreement of trabecular structure between HR-pQCT and gold standard microtomography (μCT) in patients with osteoporosis and long-term BP therapy.

Methods

In the BioAsset study, we analyzed cadaver radii and tibiae of 34 postmenopausal females (81.1 ± 7.1 years) with osteoporosis (no BP n = 22, 1–5 years BP n = 5, >5 years BP n = 7). Two HR-pQCT protocols (patient-mode and μCT-mode) were compared with gold standard μCT after image registration. Undecalcified histological sections were obtained to quantify nonmineralized bone matrix. Bland-Altman plots illustrated methodological agreement. Multiple regression analysis was used to test for variables associated with method agreement.

Results

In the radius and tibia, patient-mode HR-pQCT derived indices including bone volume fraction, trabecular number, and trabecular separation correlated well with gold standard μCT (R 2 = 0.78 − 0.88) except for trabecular thickness (R 2 = 0.11). Bland-Altman plots illustrated adequate agreement for bone volume fraction. Lower agreement of trabecular number and trabecular separation improved with decreasing structural impairment at the tibia only. Trabecular thickness was not appropriately assessed with HR-pQCT at both skeletal sites. Higher agreement for bone volume fraction was associated with increasing tissue mineral density in the tibia.

Conclusions

HR-pQCT provides acceptable in vivo accuracy for BV/TV in patients with osteoporosis and BP treatment. Higher TMD was associated with higher BV/TV accuracy in vivo. Overall, methodological agreement got less accurate with increasing structural impairment in the tibia.

Keywords

Bisphosphonates Histomorphometry HR-pQCT μCT Osteoporosis Validation study

Copyright information

© International Osteoporosis Foundation and National Osteoporosis Foundation 2014