Voxelwise quantification of hepatic perfusion parameters from dynamic contrast enhanced (DCE) imaging greatly contributes to assessment of liver function in response to radiation therapy. However, the efficiency of the estimation of hepatic perfusion parameters voxel-by-voxel in the whole liver using a dual-input single-compartment model requires substantial improvement for routine clinical app...

This paper investigates the use of the Space Carving algorithm with outdoor image sequences, using a lambertian lighting model. A new consistency function is proposed that uses a statistical comparison instead of the voxel centroid sampling that was initially proposed. This is important when there is more detail in the images than can be stored in a voxel representation. The new function is eva...

This paper presents the application of a signal intensity independent registration criterion for non-rigid body registration of medical images. The criterion is defined as the weighted ratio image of two images. The ratio is computed on a voxel per voxel basis and weighting is performed by setting the ratios between signal and background voxels to a standard high value. The mean squared value o...

During drainage, as a voxel of porous material is being actively invaded prior to percolation, the invading nonwetting fluid cannot be transmitted neighboring downstream until critical saturation (Snc) reached. This occurs when forms percolating path across voxel. We present novel laboratory observations gravitationally stable, air/water drainage in thin bead packs, with 2D fields monitored at ...

Building photorealistic 3D models of object or scene from images is still a very difficult task. The built 3D models can have different application in many areas, such as industrial, virtual reality, and movies, among others. This paper shows end to end reconstruction 3d voxels model from images using voxel coloring algorithm. We define a reconstruction area by computing the minimum 3D bounding...

Abstract In the present work, results obtained in 3D polycrystal simulations are reported on coalescence effect of neighbouring grains due to texture evolution. A cellular automaton model was developed for this purpose, which permits take into account topology coalescence. The constituting were divided voxels have realistic representations grain shapes. Taylor plasticity approach applied calcul...

Visual processing in cortex happens through a hierarchy of increasingly sophisticated representations. Here we explore a very wide range of model representations (29 models), testing their categorization performance (animate/inanimate) and their ability to account for the representational geometry of brain regions along the visual hierarchy (V1, V2, V3, V4, and LO). We also created new model in...

BACKGROUND Cells respond to a variety of external stimuli regulated by the environment conditions. Mechanical, chemical and biological factors are of great interest and have been deeply studied. Furthermore, mathematical and computational models have been rapidly growing over the past few years, permitting researches to run complex scenarios saving time and resources. Usually these models focus...

The objective of this thesis was to develop an electromagnetic voxel model of the human body. The male dataset from the Visible Human Project was used to create the so called AustinMan Electromagnetic Voxels model. A graphical user interface, the Boundary and Region Software Kit (BRISKit), was created in MATLAB for users to label image slices with their respective tissues, identify tissue bound...