Imperial College, London, UKProbabilistic Models For Medical Image Analysis 2009 Preface The workshop Probabilistic Models for Medical Image Analysis (PMMIA 2009) was

In this paper, we consider a stochastic anisotropic model for trabecular bone x-ray images. In [1], a fractal analysis based on isotropic Fractional Brownian Fields was proposed to characterize bone microarchitecture. However anisotropy measurement is of special interest for the diagnosis of osteoporosis [7]. We propose to model trabecular bone radiographs by operator scaling Gaussian random fields which are anisotropic generalizations of the Fractional Brownian Field. We construct consistent estimators for these models and apply them on trabecular bone x-ray images. Our first results suggest that these models are relevant for this modeling.