Atrial flutter in the donor part of orthotopic heart transplants has been reported and successfully treated by radiofrequency ablation of the cavotricuspid isthmus, but mapping and ablation of atypical flutter circuits may be challenging.(1) Entrainment mapping has been used in combination with activation mapping to define the mechanism of atypical atrial flutter. Here, we report a case where c...

Image-guided diagnosis and therapy are widely used in medicine nowadays. Going one step further involves methods that allow physicians to further improve their diagnosis and to plan therapy or surgery by quantitative analysis and simulation. Fundamental requirements for this kind of quantitative medicine are methods for reliable creation of 3D patient models that faith-fully represent the indiv...

The outcome for patients diagnosed with facial palsy has been shown to be linked to rehabilitation. Dense 3D morphable models have been shown within the computer vision to create accurate representations of human faces even from single 2D images. This has the potential to provide feedback to both the patient and medical expert dealing with the rehabilitation plan. It is proposed that a framewor...

This paper describes Scene Based Reasoning (SBR), a cognitive architecture based on the notions of "scene" and "plan". Scenes represent realworld 3D scenes as well as planner states. Introspection maps internal SBR data-structures into 2D "scene diagrams" for self-modeling and meta-reasoning. On the lowest level, scenes are represented as 3D scene graphs (as in computer gaming), while higher le...

This paper makes an intensive study of the realizations and related key technologies in the 3D urban traffic simulation system. First, the system can quickly edit the scenes of the 3D urban, including buildings, roads, etc. It describes the roads using the graph structure, then, the constrained Delaunay algorithm is applied to reconstruct the mesh of the road and terrain. The most important, th...

PURPOSE Several mathematical models exist to predict secondary cancer risks from radiotherapy treatment. In this study, we aimed to compare three dosimetry-based models in the application of stereotactic body radiotherapy (SBRT) of early-stage non-small cell lung cancer (NSCLC) with three radiotherapy treatment modalities. METHODS Ten patients who received definitive SBRT for early-stage NSCL...

PURPOSE MLC dynamic log files have been clinically used for quality assurance for years. The logged machine parameters and the derived beam 2D fluence maps can be compared to the ones obtained in the treatment plans in order to evaluate the accuracy and consistency of IMRT beam deliveries. In this study, we propose a computationally efficient method, called Direct 3D Fluence Calculation or D3DF...

For interactive 3D visualization of a cyber city, the efficiency of browsing is highly depended on the number of triangles and textures to be rendered. Many algorithms regarding to terrain simplification has been discussed in the field of computer vision. In this study, we will focus on the generalization of 3D building models. In the paper, an automatic approach to generate three levels-of-det...

This study investigated the curative and toxic effects of three-dimensional conformal radiotherapy (3D-CRT), using repeated CT scans for field reduction in older non-small-cell lung cancer (NSCLC) patients. 3D-CRT was administered to 36 older patients with NSCLC, and irradiation fields included the primary lesion and metastatic lymph nodes. After CT localization scanning, images were fed into a...

The complex of Villa Adriana at Tivoli is an outstanding archaeological site for its extension and articulation as well as for its state of conservation and originality. It is a sort of synthesis of the Roman genius for construction, providing an interesting review of all typological and construction techniques, from the villa to the theatre, the amphitheatre and the baths. Villa Adriana contin...