Journal article
Trabecular bone characterization on the continuum of plates and rods using in vivo MR imaging and volumetric topological analysis
Physics in medicine & biology, Vol.61(18), pp.N478-N496
08/19/2016
DOI: 10.1088/0031-9155/61/18/N478
PMCID: PMC5158528
PMID: 27541945
Abstract
Osteoporosis is associated with increased risk of fractures, which is clinically defined by low bone mineral density. Increasing evidence suggests that trabecular bone (TB) micro-architecture is an important determinant of bone strength and fracture risk. We present an improved volumetric topological analysis algorithm based on fuzzy skeletonization, results of its application on in vivo MR imaging, and compare its performance with digital topological analysis. The new VTA method eliminates data loss in the binarization step and yields accurate and robust measures of local plate-width for individual trabeculae, which allows classification of TB structures on the continuum between perfect plates and rods. The repeat-scan reproducibility of the method was evaluated on in vivo MRI of distal femur and distal radius, and high intra-class correlation coefficients between 0.93 and 0.97 were observed. The method's ability to detect treatment effects on TB micro-architecture was examined in a 2 years testosterone study on hypogonadal men. It was observed from experimental results that average plate-width and plate-to-rod ratio significantly improved after 6 months and the improvement was found to continue at 12 and 24 months. The bone density of plate-like trabeculae was found to increase by 6.5% (p = 0.06), 7.2% (p = 0.07) and 16.2% (p = 0.003) at 6, 12, 24 months, respectively. While the density of rod-like trabeculae did not change significantly, even at 24 months. A comparative study showed that VTA has enhanced ability to detect treatment effects in TB micro-architecture as compared to conventional method of digital topological analysis for plate/rod characterization in terms of both percent change and effect-size.
Details
- Title: Subtitle
- Trabecular bone characterization on the continuum of plates and rods using in vivo MR imaging and volumetric topological analysis
- Creators
- Cheng Chen - University of Iowa Departments of ECE, Iowa City, IA, USADakai Jin - University of Iowa Departments of ECE, Iowa City, IA, USAYinxiao Liu - University of Iowa Departments of ECE, Iowa City, IA, USAFelix W Wehrli - University of Pennsylvania Department of Radiology, Philadelphia, PA, USAGregory Chang - NYU Langone Medical Center Department of Radiology, New York, NY, USAPeter J Snyder - University of Pennsylvania Department of Radiology, Philadelphia, PA, USARavinder R Regatte - NYU Langone Medical Center Department of Radiology, New York, NY, USAPunam K Saha - University of Iowa Departments of Radiology, Iowa City, IA, USA
- Resource Type
- Journal article
- Publication Details
- Physics in medicine & biology, Vol.61(18), pp.N478-N496
- Publisher
- IOP Publishing
- DOI
- 10.1088/0031-9155/61/18/N478
- PMID
- 27541945
- PMCID
- PMC5158528
- ISSN
- 0031-9155
- eISSN
- 1361-6560
- Number of pages
- 19
- Language
- English
- Date published
- 08/19/2016
- Academic Unit
- Radiology; Electrical and Computer Engineering
- Record Identifier
- 9984051736002771
Metrics
15 Record Views