In this work we present a new segmentation method named Smart Cage
Active Contours (SCAC) that combines a parametrized active contour
framework named Cage Active Contours (CAC), based on a ne trans-
formations, with Active Shape Models (ASM). Our method e ectively
restricts the shapes the evolving contours can take without the need of
the training images to be manually landmarked. We apply our method to
segment the caudate nuclei subcortical structure of a set of 40 subjects in
magnetic resonance brain images, with promising results.