Thomas Brunner
Thomas Brunner, Nurnberg DE
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20080304617 | Method for generating a 3D reconstruction of a body - The invention relates to a method for generating a 3D reconstruction of an especially large body that cannot be captured by a single projection by capturing at least two projections, which together capture the body, at each of the positions taken up by a C-arm X-ray unit. Data from the two projections is projected onto a virtual detector and the data from the virtual detector is then used for the filtered back projection procedure. It is assumed here that the real source remains motionless and that only the detector moves. A virtual detector D | 12-11-2008 |
20090074135 | Method for generating an image sequence for a 3D reconstruction - When recording an image sequence, it is possible to deviate from passing through a perfect curve path. There is described how an alternative curve path can be determined. An envelope is determined, a point is determined, which is the center point of the region of interest and then the detector is moved such that it is at right angles in each instance to a line which emanates from the point and simultaneously touches the envelope tangentially. As a result, the region of interest is mapped as optimally as possible in the image sequence so that as good a 3D reconstruction as possible can be obtained. | 03-19-2009 |
20090297011 | METHOD FOR OBTAINING A 3D (CT) IMAGE USING A C-ARM X-RAY IMAGING SYSTEM VIA ROTATIONAL ACQUISITION ABOUT A SELECTABLE 3D ACQUISITION AXIS - In a method for acquiring a 3D image rotational acquisition and reconstructed 3D image of an examination subject in whom a highly dense object is located, the 3D acquisition axis for acquiring the 3D image rotational acquisition is selected prior to acquisition, such that the orientation of the region of interest with respect to an artifact inducing object is not perpendicular to the 3D acquisition axis. | 12-03-2009 |
20110040178 | METHOD FOR 3-D DATA COLLECTION WITH A BIPLANE C-ARM SYSTEM WITH BIPLANE ACQUISITION MULTIPLEXING - A method for collecting three-dimensional data of an object from a series of projection images recorded by a biplane C-arm system is provided. A cardiac activity is recorded. The cardiac frequency and a start cardiac phase are determined for calculating parameters of the C-arm planes. The C-arm planes are set with the parameters and data is acquired in the start cardiac phase. The C-arm planes are uniformly rotated at a same speed in a forward motion over an angular area and record data at different angular areas at different cardiac phases. Data is acquired in the start cardiac phase after termination of the forward motion. The C-arm planes are uniformly rotated at a same speed in a backward motion over an angular area and records data at different angular areas at different cardiac phases. The captured data are reconstructed after termination of the backward motion upon completed acquisition. | 02-17-2011 |
Thomas Brunner, Nuernberg DE
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20090202046 | METHOD AND SYSTEM FOR ACQUIRING PROJECTION FOR 3D RECONSTRUCTION OF AN OFF-CENTER ROI - In the acquisition of an image series with an x-ray image acquisition that has an x-ray C-arm rotatable around a center point, movement of the patient table is updated so that table is brought into a specific position calculated relative to the angle position of the x-ray C-arm. This position of the patient table is determined as follows. An envelope is established and a point is established that is the center point of a region of interest. In each position of the patient table that matches the position of the x-ray C-arm, the flat panel detector is perpendicular to a line emanating from the point and simultaneously contacts (is tangent to) the envelope. The region of interest is thereby optimally imaged in the image series so that a good 3D reconstruction can be obtained. | 08-13-2009 |
20100254585 | OVEREXPOSURE CORRECTION FOR LARGE VOLUME RECONSTRUCTION IN COMPUTED TOMOGRAPHY APPARATUS - A method and system of processing medical images such as projection images of large volume structures obtained by two-pass scanning for generating three-dimensional images. Measured values of each image frame is calculated as an image line. Over-exposed portions of the image line are detected to at one end of the image line and then at the other end of the image line. A determination is made of the approximate center of the image line. A line integral of the image line is generated and then using an assumed shape the over-exposed portions are extrapolated. The processed image frames may then be combined to generate the three-dimensional image. | 10-07-2010 |
Thomas Brunner, Graz AT
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20090308245 | METHOD AND DEVICE FOR REDUCING FORMATION OF PARTICULATE MATTER IN GAS STREAMS - A method and device for the reduction of particulate forming vapors in gases, the method comprising passing the gas stream through at least one channel ( | 12-17-2009 |
Thomas Brunner, Numberg DE
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20090236511 | Method for evaluating an image dataset acquired by a radiation-based image acquisition device - The invention relates to a method for evaluating an image dataset obtained by a radiation-based image acquisition device. A scatter background dataset is determined as a function of the image data. The image dataset is corrected pixel by pixel by multiplying the image dataset with the inverse of a function dependent on the quotient of the scatter background data and the image data at a respective pixel. The function is a nonlinear, smooth function determined by a coefficient and having positive derivatives. The absolute value of the function is one for the value zero. The image acquisition parameter dependent coefficient is determined by an optimization process. | 09-24-2009 |