Patent application number | Description | Published |
20090189889 | Method and apparatus for visualizing 3D image data from tomographic imaging modalities - At least one embodiment of the present invention relates to a method and an apparatus for visualizing 3D image data from tomographic imaging modalities using a rendering technique in which every pixel is calculated by integrating or summing along respectively one ray through a volume surrounded by the 3D image data. In the method, a peeling function is additionally introduced into the integration or summation, by which, in the integration or summation, the 3D image data on the respective ray only contributes with its full data value to reducing the optical transparency beyond a prescribable value of an optical skin depth. The peeling function is selected such that, in a transition region before the prescribable value of the optical skin depth is reached, the 3D image data on the ray still contributes to reducing the optical transparency with a fraction of its full data value such that there is a smooth profile, generated by the peeling function, when an outer layer is peeled off. The method and the associated apparatus make it possible to avoid image artifacts such as pixel flickering during volume visualization. | 07-30-2009 |
20110069066 | INTERACTIVE CHANGING OF THE DEPICTION OF AN OBJECT DISPLAYED USING VOLUME RENDERING - A depiction of a three-dimensional object that is displayed using volume rendering is influenced. A representation of the object, in which values of a variable characterizing the object are given at spatial points of the object and in which color values are allocated to the variable during the course of rendering, is provided. A set of points defined in the space of representation of the object is input, and a distance from spatial points incorporated by the representation to the set of points is calculated. Color values allocated to spatial points are modified, or color values are determined according to the calculated distance. A depiction of the object by volume rendering is calculated using the representation of the object, the representation incorporating the modified or determined color values. | 03-24-2011 |
20110069069 | EFFICIENT DETERMINATION OF LIGHTING EFFECTS IN VOLUME RENDERING - A two-dimensional representation of an object using volume rendering, with a representation of the object being used in which values of a quantity characterizing the object are given at spatial points of the object, is provided. A blended color value for the representation as pixels on a screen is calculated using a volume rendering technique that does not use an illumination model or uses a local illumination model. At least one ray emanating from a surface of the object is simulated for the purpose of calculating the effect of shadows or the effect of ambient occlusion. A value for the effect of shadows or a value for the effect of ambient occlusion is calculated using the at least one ray. The blended color value and the calculated value are combined in order to obtain a blended color value that takes into account the effect of shadows or ambient occlusion. | 03-24-2011 |
20110069070 | EFFICIENT VISUALIZATION OF OBJECT PROPERTIES USING VOLUME RENDERING - A method for the visualization of an object using simulated radiation includes using a representation of the object, in which values of a variable that characterizes the object are given at spatial points in the object. A first ray is generated to determine a pixel color value assigned to a pixel for a two-dimensional representation of the object. The first ray is propagated through at least a part of the object. The method also includes determining, step-by-step, values of a variable on the first ray and detecting a surface of the object using the values determined on the first ray. At least one second ray is generated for determining a quantitative value that characterizes a property of the object, and the at least one second ray is propagated away from the surface, through at least a part of the object. The method also includes determining, step-by-step, values associated with the variable on the at least one second ray, determining the quantitative value that characterizes the property of the object using the at least one second ray, assigning a color value in accordance with the quantitative value, and using the color value to determine the pixel color value. | 03-24-2011 |
20120189092 | Imaging Method with Improved Display of a Tissue Region, Imaging Device, and Computer Program Product - An imaging method with an improved display of a tissue region generates a first visualization and a second visualization from projection recordings that were recorded at different angles. A radiologist is enabled to mark a region in the first visualization, which region is displayed by way of the second visualization. | 07-26-2012 |
20120308095 | METHOD AND DEVICE FOR ADJUSTING THE VISUALIZATION OF VOLUME DATA OF AN OBJECT - An adjustment of the visualization of volume data of an object as an image with regard to diagnostically relevant medical information relating to the environment of a region under investigation is provided. In the process, at least one slice region is specified in accordance with slice information within the volume data. A first mapping of a value range of the volume data is used for visualizing the at least one slice region on a display. A second mapping different from the first mapping is used for visualizing a region bordering on the at least one slice region on the display. | 12-06-2012 |
20120308107 | METHOD AND APPARATUS FOR VISUALIZING VOLUME DATA FOR AN EXAMINATION OF DENSITY PROPERTIES - Properties of an object are visualized as an image on a display. In this way, the object is visualized using volume data. In accordance with slice information, at least one slice area is defined within the volume data. An image of a value region of the volume data is used for visualization on the display. The image is changed for the slice area in accordance with a distance of the slice area relative to a region of volume data bordering the slice area. | 12-06-2012 |
20130135306 | METHOD AND DEVICE FOR EFFICIENTLY EDITING A THREE-DIMENSIONAL VOLUME USING RAY CASTING - A method for efficiently changing a depiction of a three-dimensional volume using ray casting is providing. The method includes dividing the three-dimensional volume into zones, inputting a change that is required to the depiction, and ascertaining the zones that are affected by the change. The method also includes classifying the change as relevant to a zone when the zone is affected by the change and effecting an assignment between the affected zones and the relevant changes. The method includes performing ray casting using simulated rays. A change is only carried out for sampling points along the rays when the sampling point lies in an affected zone. | 05-30-2013 |
20130271464 | Image Generation with Multi Resolution - A method for generating an image formed with pixels from volume data representing a volume with the aid of volume rendering with multi resolution is provided. The method includes implementing a calculation of a pixel of the image and determining an item of information characterizing resolution used during the pixel calculation. The method also includes adjusting the pixel in accordance with the item of information. | 10-17-2013 |
20140049542 | Layer Display of Volume Data - A layer display of volume data is provided. A layer orientation for the layer display of the volume data is selected. At least one layer is calculated in accordance with the selected orientation. A virtual light source is selected for the inclusion of light effects in the display of the layers. A calculation is performed of a light effect generated by the virtual light source with the help of a reflection model for the at least one layer. The at least one layer is displayed, taking account of the light effect. | 02-20-2014 |
20140085305 | Slice Representation of Volume Data - Slice representation of a volume with the aid of volume data is provided. A selection of a slice orientation for slice representation of volume data is made. A slice is then determined in accordance with the selected orientation. A relief representation is calculated for this slice and used as a relief for the representation of the at least one slice. A vivid representation of slice information is provided. | 03-27-2014 |