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Monitoring Bone Growth Using DXA and pQCT

Chapter

Abstract

The structure and strength of bone established at the cessation of growth have strong influence on the emergence of skeletal fragility later in life. Monitoring bone growth and timely intervention to avoid long-term consequence of diseases or medications on bone health becomes an indispensable part of paediatric patient care. However, the tools available for assessment of bone mineral density (BMD) and structure in children are limited and most of these tools were developed for and thus limited their use to adults (e.g. DXA). Bone is a 3D structure composed of cortical and trabecular bone varying in proportion from bone to bone and from site to site along a bone. Understanding the effects of diseases or medications on bone development thus requires precise measurement of the 3D bone structure which cannot be fulfilled by 2D imaging techniques. The quantitative computed tomography (QCT), especially the high-resolution peripheral QCT (HR-pQCT), is becoming a necessary tool for paediatric patients due to its capacity to assess bone structure and thus strength. This chapter will address the use of the two commonly used techniques in children, focusing on their indications and interpretation.

Keywords

Distal Radius Cortical Thickness Bone Size Peripheral Quantitative Compute Tomography Metaphyseal Region 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Abbreviations

aBMD and vBMD

Areal and volumetric bone mineral density

CSA

Cross-sectional area

DXA

Dual-energy x-ray absorptiometry

HR-pQCT

High-resolution pQCT

pQCT

Peripheral QCT

QCT

Quantitative computed tomography

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  1. 1.Endocrine CentreRepatriation HospitalHeidelberg WestAustralia
  2. 2.Endocrine CentreHeidelberg Repatriation Hospital/Austin Health, University of MelbourneHeidelberg WestAustralia

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