How does it work?
3D-DXA is a technology developed by Tristan Whitmarsh which generates a three-dimensional reconstruction of bone structures from Dual-energy X-ray Absorptiometry (DXA) images1,2. From these tomographic reconstructions, three-dimensional structural and densitometric measurements can be taken. The main difficulty with this technique is the limited number of views provided by DXA. This has been overcome by the use of a-priori information in the form of statistical bone models3. These statistical models are constructed from a large number of Quantitative Computed Tomography (QCT) scans and describe the variations in shape and density distribution of the input population. The reconstruction process finds the parameter values of the statistical model such that the projection of the model matches the DXA image. This results in an instance of the statistical model with a morphometry that closely resembles the patients’ bone.