Juliet ( Joint Use of Landmarks and Intensity for Elastic regis Tration) is a non-rigid registration algorithm that is built on the Romeo software. Juliet makes it possible to incorporate sparse constraints deduced from the matching of anatomical structures such as cortical sulci for instance. A sparse deformation field is introduced as a soft constraint in the minimization to drive the registration process. A robust estimator is used so as to limit segmentation errors and false matching  . Juliet has been registered at APP with number: IDDN.FR.001.45001.001.S.A.2001.000.21000.