Vincent Nicolas

T-flash: Tensor Visualization in Medical Studio

abstract Tensor valued data are frequently used in medical imaging. For a 3-dimensional second order tensor such data imply at least six degrees of freedom for each voxel. The operators ability to perceive this information is of outmost importance and in many cases a limiting factor for the interpretation of the data. In this paper we propose a decomposition of such tensor fields using the Tflash tensor glyphs that intuitively conveys important tensor features to a human observer. A matlab implementation for visualization of single tensors are described in detail and a VTK/ITK implementation for visualization of tensor fields have been developed as a Medical Studio component.

ACRO 4D : universal analysis for four-dimensional diagnosis, 3D planning and simulation in orthognathic surgery

This new analysis permits to study different craniomaxillofacial malformations and facial asymmetry. The visualization of ACRO 4D analysis is done in 3D, understanding the results must be done in 4D (3D and time), which associates the Moss neural matrix theory and the Delaire ideal individual equilibrium concept. The ACRO 4D analysis contains 38 landmark points and 28 plans. Angles (5), surfaces (10) and volumes (9) can be measured. The ACRO 4D analysis has been decomposed in 16 modules and 6 standard planing procedures have been implemented by combining these modules. Ten of these modules represent the 2D to 3D transformations from 2D Delaire analysis. Six modules study the symmetry – asymmetry of the different craniofacial regions. The ACRO 4D analysis guides the surgeon, step by step, to the diagnosis, with clear guidelines and 3D incorporated examples. The generic tools, developed in this software, can achieve the transformation of every 2D to 3D cephalometric analysis with the creation of the independent landmark points, lines, plans and volumes. Our further investigations are the validation of the method accuracy, the clinical validation on patients and development of 3D orthognathic surgery simulation based on this ACRO 4D analysis.

A medical Component-based Framework for Image Guided Surgery

This chapter introduces MedicalStudio, a composable, open-source easily evolvable cross-platform framework targeted to medical interventions and equally attentive to research and therapeutic concerns. It consists of a commonly framework for planning, simulating and performing interventional procedures assuring more compatibility within the surgical workflow. Details about the framework architecture and its implementation are presented in this chapter together with the description of general purpose components for image segmentation, multimodal registration, visualization 2D, 3D and augmented reality. Finally an application developed with MedicalStudio to provide surgical guidance during the maxillofacial surgery shows the versatility and promising dissemination of this medical framework.

A Resource Oriented Multimedia Description Framework

This chapter presents a multimedia archiving framework to describe the content of multimedia resources. This kind of content is very rich in terms of meanings and archiving systems have to be improved to consider such richness. This framework simplifies the multimedia management in existing applications, making it accessible for non-specialized developers. This framework is fully implemented on the REST architectural style, precisely mapping the notion of resource with media artifacts, and scaling to address the growing demand for media. It offers an extensive support for segmentation and annotation to attach semantics to content, helping search mechanisms to precisely index those content. A detailed example of the framework adoption by a medical imaging application for breast cancer diagnosis is presented.