Locally Adaptive Autoregressive Active Models for Segmentation of 3d Anatomical Structures

Many techniques of knowledge-based segmentation consist of building statistical models that describe the deformations of the structure of interest, and then fit these models to the image data. In this paper, we introduce a novel family of shape prior models that aim to capture such varying support. To this end, 3D segmentation is considered progressively with 2D slices segmented in a qualitative fashion, starting from the ones with strong data support toward the ones of limited support. Successive segmentation maps are linked through a locally adaptive autoregressive prediction mechanism - that is learned through training - where confidence of the data from prior slices constrains the results. Such prediction is integrated with a contour minimization technique, leading to a Bayesian sequential procedure that iteratively predicts and corrects 2D contours leading to complete reconstruction of 3D anatomical structures. A quantitative comparative study with 3D Active Shape Models demons...

• Type: Conference
• Year: 2007
• Where: ISBI
• Authors: Charles Florin, Nikos Paragios, Gareth Funka-Lea, James Williams
• Keywords: ISBI 2007, Knowledge-based Segmentation, Medical Imaging, Shape Prior Models, Successive Segmentation Maps