Individual trabeculae segmentation (ITS)–based morphological analysis of high‐resolution peripheral quantitative computed tomography images detects abnormal trabecular plate and rod microarchitecture in premenopausal women with idiopathic osteoporosis

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Liu, X. Sherry^1,2; Cohen, Adi²; Shane, Elizabeth²; Stein, Emily²; Rogers, Halley²; Kokolus, Shannon L²; Yin, Perry T.¹; McMahon, Donald J²; Lappe, Joan M.³; Recker, Robert R³; Guo, X. Edward¹

Individual trabeculae segmentation (ITS)–based morphological analysis of high‐resolution peripheral quantitative computed tomography images detects abnormal trabecular plate and rod microarchitecture in premenopausal women with idiopathic osteoporosis

J Bone Miner Res. July 2010;25(7):1496-1505

©2010 American Society for Bone and Mineral Research

Affiliations

¹Bone Bioengineering Laboratory, Department of Biomedical Engineering, Columbia University, New York, NY, USA

²Division of Endocrinology, Department of Medicine, Columbia University, New York, NY, USA

³Department of Medicine, Osteoporosis Research Center, Creighton University, Omaha, NB, USA
Abstract and keywords

Idiopathic osteoporosis (IOP) in premenopausal women is a poorly understood entity in which otherwise healthy women have low‐trauma fracture or very low bone mineral density (BMD). In this study, we applied individual trabeculae segmentation (ITS)–based morphological analysis to high‐resolution peripheral quantitative computed tomography (HR‐pQCT) images of the distal radius and distal tibia to gain greater insight into skeletal microarchitecture in premenopausal women with IOP. HR‐pQCT scans were performed for 26 normal control individuals and 31 women with IOP. A cubic subvolume was extracted from the trabecular bone compartment and subjected to ITS‐based analysis. Three Young's moduli and three shear moduli were calculated by micro–finite element (µFE) analysis. ITS‐based morphological analysis of HR‐pQCT images detected significantly decreased trabecular plate and rod bone volume fraction and number, decreased axial bone volume fraction in the longitudinal axis, increased rod length, and decreased rod‐to‐rod, plate‐to‐rod, and plate‐to‐plate junction densities at the distal radius and distal tibia in women with IOP. However, trabecular plate and rod thickness did not differ. A more rod‐like trabecular microstructure was found in the distal radius, but not in the distal tibia. Most ITS measurements contributed significantly to the elastic moduli of trabecular bone independent of bone volume fraction (BV/TV). At a fixed BV/TV, plate‐like trabeculae contributed positively to the mechanical properties of trabecular bone. The results suggest that ITS‐based morphological analysis of HR‐pQCT images is a sensitive and promising clinical tool for the investigation of trabecular bone microstructure in human studies of osteoporosis.

Keywords: BONE MICROSTRUCTURE; HIGH-RESOLUTION PERIPHERAL QUANTITATIVE COMPUTED TOMOGRAPHY; INDIVIDUAL TRABECULAE SEGMENTATION; TRABECULAR PLATE/ROD
Links

DOI: 10.1002/jbmr.50

PubMed: 20200967

WoS: 000280395900004
History

Received: 2009-06-30

Revised: 2009-08-26

Accepted: 2010-01-19

Online: 2010-01-25

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