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In this study, we utilise a novel approach to segment out the ventricular system in a series of high resolution T1-weighted MR images. We present a brain ventricles fast reconstruction method. The method is based on the processing of brain sections and establishing a fixed number of landmarks onto those sections to reconstruct the ventricles 3D surface. Automated landmark extraction is accomplished through the use of the self-organising network, the growing neural gas (GNG), which is able to topographically map the low dimensionality of the network to the high dimensionality of the contour manifold without requiring a priori knowledge of the input space structure. Moreover, our GNG landmark method is tolerant to noise and eliminates outliers. Our method accelerates the classical surface reconstruction and filtering processes. The proposed method offers higher accuracy compared to methods with similar efficiency as Voxel Grid. ; This work was partially funded by the Spanish Government DPI2013-40534-R grant and Valencian Government GV/2013/005 grant.

The information agent has requirements in the Information Technology (IT) age that are in everything comparable to those of one hundred years ago. But, despite being similar, they require new forms of implementation due to the evolution of the communication platforms and protocols and to the increase in the amount of information that has to be known, stored, transmitted, and interpreted. Although, in many situations, the information agent will make use of everyday equipment, he will always require levels of trust in the processes that are far beyond those of the everyday citizen. But this cannot imply to carry huge infrastructures that will reveal the agent's intentions. In extreme situations the information agent is the soldier engaged in military activities in hostile environments. There, above all places, he requires light weight trustable equipment and protocols that can perform those tasks. This work, while making the parallel with the traditional methods, proposes a technological environment able to give answer to the requirements of information agents dealing with the need for a competitive intelligence advantage through the correct use of IT, namely biometrics, alternative authentication processes, Public Key Infrastructures and anti-fishing ...