摘要:
In a method for reconstructing 3D image data, a number of 2D central projections from different projection directions is acquired with a planar detector and radiation emanating from a radiation source, and a volume of interest of an examination subject to be three-dimensionally reconstructed is identified by mixing in variable and mutually dependent marks into at least two 2D central projections.
摘要:
In a device and associated method for reconstruction and visualization of projection data, projection data are stored per slice and are subjected to an image reconstruction procedure in parallel within arbitrary slice planes in a processor-controlled filtering process that is executed n times, wherein volume data that are created can already be made available (loaded) for a direct visualization.
摘要:
In a device and associated method for reconstruction and visualization of projection data, projection data are stored per slice and are subjected to an image reconstruction procedure in parallel within arbitrary slice planes in a processor-controlled filtering process that is executed n times, wherein volume data that are created can already be made available (loaded) for a direct visualization.
摘要:
In a tomosynthetic image reconstruction method and diagnostic device operating with such a method, a tomosynthetic 3D x-ray image is reconstructed by a discrete filtered back projection from a number of individual digital projection data recorded from different project angles within a restricted angular range, in which at least one filtering is performed with a convolution kernel that, in the local area outside of its central value, corresponds to an exponential function.
摘要:
In an image reconstruction method for 3-d image reconstruction, particularly a fast reconstruction method for rotational angiography employing a pyramidal X-ray beam and a surface detector, image reconstruction is accomplished in a computer using an algorithm of the filtered back-projection type, and, outside the zero component, the components of the convolution kernel correspond to an exponential function. A particularly fast image reconstruction is achieved with such a convolution kernel by using recursive filtering.
摘要:
In a tomosynthetic image reconstruction method and diagnostic device operating with such a method, a tomosynthetic 3D x-ray image is reconstructed by a discrete filtered back projection from a number of individual digital projection data recorded from different project angles within a restricted angular range, in which at least one filtering is performed with a convolution kernel that, in the local area outside of its central value, corresponds to an exponential function.
摘要:
An imaging apparatus has a capture device for capturing 1D or 2D image data. A position and/or orientation for a moving section of an examination object is captured, for example using a measuring device, for a plurality of capture times for the image data. A computation device reconstructs 3D volume data from the image data based on projection parameters and based on the position and/or orientation of the moving section of the examination object.
摘要:
In a method to extend the display range of 2D image recordings of an object region, particularly in medical applications, first 2D or 3D image data are acquired from a larger object region, and at least one additional set for 2D image data of a smaller object region is acquired that lies within the larger object region The first 2D or 3D image data are brought into registration with the additional 2D image data with a projection geometry. From the first 2D or 3D image data, an image data set is generated for an image display of the first object region, which is suitable for combination with the additional 2D image data. In the image display of the larger object region, at least temporarily, at least one display of the additional 2D image data is integrated, by image data in the first image data set, for the image display of the larger object region, being replaced with image data from the additional 2D image data representing the smaller image region. An overview of the larger object region is thus enabled, with the smaller object region of interest being displayed within the image in a more up-to-date fashion, as well as with higher resolution and/or higher contrast.
摘要:
In a system for the producing and displaying a virtual access channel in medical images, having a computer with a monitor, and a position and orientation-capturing operating unit and a method for producing and displaying such a virtual access channel in medical 3D images, the computer contains a preoperatively obtained 3D data record of a patient to be examined and can display this as a 3D image and is connected with the operating unit such that a virtual optical channel of the 3D data record is excised from the data record based on a registration between the operating unit and the data record as well as based on different channel parameters, and is displayed on the monitor of the computer.
摘要:
In a method for surface contouring of a three-dimensional image of an object a set of planes is placed through the three-dimensional image, and the contours that are imaged in each of the planes of the first set of planes, and that are associated with the surface contour of the three-dimensional image, are determined. The contours are subsequently combined into a surface grid associated with the surface contour of the three-dimensional image.