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01-12-2017 | Methodology | Uitgave 1/2017 Open Access

Journal of Foot and Ankle Research 1/2017

Computed tomography derived bone density measurement in the diabetic foot

Tijdschrift:
Journal of Foot and Ankle Research > Uitgave 1/2017
Auteurs:
Alex Barwick, John Tessier, James Mirow, Xanne Janse de Jonge, Vivienne Chuter
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Electronic supplementary material

The online version of this article (doi:10.​1186/​s13047-017-0192-7) contains supplementary material, which is available to authorized users.

Abstract

Background

The accurate and reliable measurement of foot bone density is challenging and there is currently no gold standard technique. Such measurement is particularly valuable in populations at risk of foot bone pathology such as in those with long term diabetes. With research and development, computed tomography may prove to be a useful tool for this assessment. The aim of this study was to establish the reliability of a novel method of foot bone density measurement in people with diabetes using computed tomography.

Methods

Ten feet in people with diabetes were scanned with computed tomography twice with repositioning. Bone density (in Hounsfield units) was assessed in the trabecular and cortical bone in all tarsals and metatarsals. Reliability was assessed with intra-class correlation coefficients (95% confidence intervals), limits of agreement and standard error of measurement.

Results

The reliability of the trabecular density of most bones was excellent with intra-class correlation coefficients ranging from 0.68 to 0.91. Additionally, cortical bone density showed fair to good reliability at the talus (0.52), calcaneus (0.59), navicular (0.70), cuboid (0.69), intermediate cuneiform (0.46) and first metatarsal (0.61).

Conclusions

The study established the reliability of a practical method of assessing the trabecular and cortical foot bone density using computed tomography scanning. This methodology may be useful in the investigation of foot bone disease occurring in diabetes and its early diagnosis, intervention and assessment of treatment efficacy. Further development of this method is warranted.

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