straight 75 / 31 123 / 33 170 / 158 169 / 211 180 / 194 bent 129 / 76 154 / 96 159 / 136 194 / 180 213 / 136 Table 1: Number of streamlines approx. 15 cm upstream / downstream from the emitter plane (400 emitters) in the middle of the straight and bent tube. The number of streamlines reaching the inflow and outflow plane (dotted white line in figure 2 and 3) increased for each correction method...

Vector fields, represented as vector values sampled on the vertices of a triangulation, are commonly used to model physical phenomena. To analyze and understand vector fields, practitioners use derived properties such as the paths of massless particles advected by the flow, called streamlines. However, computing streamlines requires numerical methods not guaranteed to preserve fundamental invar...

For the visualization of diffusion tensor imaging data, different approaches have been presented such as scalar metrics, glyphs or streamlines. Thereby, streamline techniques commonly referred to as fiber tracking provide a comprehensive and intuitive representation. For this reason, they are preferably applied for preoperative planning. The visualization of streamlines is solved by rendering l...

The analysis and visualization of flows is a central problem in visualization. Topology based methods have gained increasing interest in recent years. This article describes a method for the detection of closed streamlines in 3D flows. It is based on a special treatment of cases where a streamline reenters a cell to prevent infinite cycling during streamline calculation. The algorithm checks fo...

In recent years the work on vector field visualization has been concentrated on LIC-based methods. In this paper we propose an alternative solution for the visualization of unsteady flow fields. Our approach is based on the computation of temporal series of correlated images. While other methods are based on pathlines and try to correlate successive images at the pixel level, our approach consi...

Imaging and delineation of the optic radiations (OpRs) remains challenging, despite repeated attempts to achieve reliable validated tractography of this complex structure. Previous studies have used varying methods to generate representations of the OpR which differ markedly from one another and, frequently, from the OpR's known structure. We systematically examined the influence of a key varia...

We present a semi-automatic approach for stream surface generation. Our approach is based on the conjecture that good seeding curves can be inferred from a set of streamlines. Given a set of densely traced streamlines over the flow field, we design a sketch-based interface that allows users to describe their perceived flow patterns through drawing simple strokes directly on top of the streamlin...

Introduction In probabilistic streamline tractography, the choice of the number of streamlines to use is the source of much confusion. It is known that in order to sufficiently sample the voxelwise fibre orientation distributions so that a reasonable picture of the network of connections can be delineated, some minimal number of streamlines must be used [1]. But without a handle on the effects ...