Spline-Based probabilistic model for anatomical landmark detection

Authors:
Camille Izard;Bruno Jedynak;Craig E. L. Stark
Affiliations:
Laboratoire Paul Painlevé, Université des Sciences et Technologies de Lille, France;Laboratoire Paul Painlevé, Université des Sciences et Technologies de Lille, France;Department of Psychological and Brain Sciences, Johns Hopkins University, Baltimore, MD
Venue:
MICCAI'06 Proceedings of the 9th international conference on Medical Image Computing and Computer-Assisted Intervention - Volume Part I
Year:
2006

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Abstract

In medical imaging, finding landmarks that provide biologically meaningful correspondences is often a challenging and time-consuming manual task. In this paper we propose a generic and simple algorithm for landmarking non-cortical brain structures automatically. We use a probabilistic model of the image intensities based on the deformation of a tissue probability map, learned from a training set of hand-landmarked images. In this setting, estimating the location of the landmarks in a new image is equivalent to finding, by likelihood maximization, the ”best” deformation from the tissue probability map to the image. The resulting algorithm is able to handle arbitrary types and numbers of landmarks. We demonstrate our algorithm on the detection of 3 landmarks of the hippocampus in brain MR images.