Patents by Inventor Bernhard Johannes Brendel
Bernhard Johannes Brendel has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9761006Abstract: Image processing methods and related apparatuses (SEG,UV). The apparatuses (SEG,UV) operate to utilize noise signal information in images (IM). According to one aspect, apparatus (SEG) uses the noise information (FX) to control a model based segmentation. According to a further aspect, apparatus (UV) operates, based on the noise information (FX), to visualize the uncertainty of image information that resides at edge portions of the or an image (IM).Type: GrantFiled: June 26, 2014Date of Patent: September 12, 2017Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Frank Bergner, Rolf Dieter Bippus, Bernhard Johannes Brendel, Michael Grass, Cristian Lorenz, Thomas Koehler
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Patent number: 9760992Abstract: A method includes re-sampling current image data representing a reference motion state into a plurality of different groups, each group corresponding to a different motion state of moving tissue of interest, forward projecting each of the plurality of groups, generating a plurality of groups of forward projected data, each group of forward projected data corresponding to a group of the re-sampled current image data, determining update projection data based on a comparison between the forward projected data and the measured projection data, grouping the update projection data into a plurality of groups, each group corresponding to a different motion state of the moving tissue of interest, back projecting each of the plurality of groups, generating a plurality of groups of update image data, re-sampling each group of update image data to the reference motion state of the current image, and generating new current image data based on the current image data and the re-sampled update image data.Type: GrantFiled: September 17, 2014Date of Patent: September 12, 2017Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Bernhard Johannes Brendel, Thomas Koehler, Rolf Dieter Bippus, Roland Proksa
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Publication number: 20170213365Abstract: A signal processing apparatus and a related method. In particular, the apparatus includes a novel image reconstructor to reconstruct cross sectional images of a specimen from interferometric projection data (m). The reconstructor (RECON) is based on a new forward model that accounts for cross-talk of a phase contrast signal into a dark field signal.Type: ApplicationFiled: August 4, 2015Publication date: July 27, 2017Inventors: Thomas KOEHLER, Bernhard Johannes BRENDEL
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Publication number: 20170196524Abstract: The present invention relates to an imaging apparatus and a corresponding imaging method.Type: ApplicationFiled: September 22, 2015Publication date: July 13, 2017Inventors: Thomas KOEHLER, Roland PROKSA, Bernhard Johannes BRENDEL, Ewald ROESSL
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Patent number: 9613441Abstract: A method and a related system (IMA) for reconstructing an image of an electron density in a subject PAT. An x-ray radiation imager is used to expose the subject PAT to radiation to receive projection data. The reconstruction method combines projection data from two channels, namely Compton scatter based attenuation data pC and phase shift data pd?.Type: GrantFiled: August 29, 2014Date of Patent: April 4, 2017Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Thomas Koehler, Bernhard Johannes Brendel, Ewald Roessl
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Patent number: 9600866Abstract: This application describes an approach to filter, solely in the projection domain, correlated noise from (or de-noise) spectral/multi-energy projection data. As described herein, this can be achieved based at least on variances of the basis material line integrals and a covariance there between, based on multiple correlation coefficients and hyper-planes that describe the noise correlation between different basis material line integrals, and/or otherwise.Type: GrantFiled: November 7, 2013Date of Patent: March 21, 2017Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Bernhard Johannes Brendel, Gilad Shechter
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Publication number: 20170004637Abstract: The invention relates to an image generation apparatus (1) for generating an image of an object. A reconstruction unit (10) reconstructs the image based on provided measured projection values such that costs defined by a cost function are reduced, wherein the cost function depends on differences between calculated projection values, which have been determined by simulating a forward projection through the image, and the provided measured projection values, and wherein a degree of dependence of the cost function on a respective difference depends on the respective difference. This can allow for a consideration of a degree of disturbance of the measured projection values by motion and/or by an incomplete illumination of the object during the reconstruction process, which can lead to a reconstruction of an image having an improved image quality.Type: ApplicationFiled: March 18, 2015Publication date: January 5, 2017Inventors: Thomas KOEHLER, Axel THRAN, Frank BERGNER, Bernhard Johannes BRENDEL, Rolf Dieter BIPPUS
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Publication number: 20160331341Abstract: A method includes obtaining projection data from a scan of a moving structure of interest. The method further includes reconstructing the projection data, generating first image data. The method further includes identifying a sub-set of the projection. The method further includes reconstructing the sub-set projection data, generating second image data. The method further includes identifying a region in which the moving structure of interest is located based on the first image data. The method further includes identifying a location of the moving structure of interest in the identified region based on the second image data.Type: ApplicationFiled: December 12, 2014Publication date: November 17, 2016Inventors: Bernhard Johannes BRENDEL, Michael GRASS, Holger SCHMITT, Sven KABUS
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Publication number: 20160242726Abstract: A beam hardening correction method, a related calibration method for tomographic image data and a related apparatus. The tomographic image data includes attenuation data (f) and phase gradient data (g) and/or small angle scattering data (h). A correction value is computed from the attenuation data (f) by applying a function (q) to the attenuation data (f). The correction value is combined (S445) with the phase gradient data (g) or with the small angle scattering data (h).Type: ApplicationFiled: October 30, 2014Publication date: August 25, 2016Applicant: KONINKLIJKE PHILIPS N.V.Inventors: Thomas KOEHLER, Bernhard Johannes BRENDEL
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Publication number: 20160217596Abstract: A method and a related system (IMA) for reconstructing an image of an electron density in a subject PAT. An x-ray radiation imager is used to expose the subject PAT to radiation to receive projection data. The reconstruction method combines projection data from two channels, namely Compton scatter based attenuation data pC and phase shift data pd?.Type: ApplicationFiled: August 29, 2014Publication date: July 28, 2016Inventors: Thomas KOEHLER, Bernhard Johannes BRENDEL, Ewald ROESSL
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Publication number: 20160210741Abstract: A method includes re-sampling current image data representing a reference motion state into a plurality of different groups, each group corresponding to a different motion state of moving tissue of interest, forward projecting each of the plurality of groups, generating a plurality of groups of forward projected data, each group of forward projected data corresponding to a group of the re-sampled current image data, determining update projection data based on a comparison between the forward projected data and the measured projection data, grouping the update projection data into a plurality of groups, each group corresponding to a different motion state of the moving tissue of interest, back projecting each of the plurality of groups, generating a plurality of groups of update image data, re-sampling each group of update image data to the reference motion state of the current image, and generating new current image data based on the current image data and the re-sampled update image data.Type: ApplicationFiled: September 17, 2014Publication date: July 21, 2016Applicant: KONINKLIJKE PHILIPS N.V.Inventors: Bernhard Johannes BRENDEL, Thomas KOEHLER, Rolf Dieter BIPPUS, Roland PROKSA
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Publication number: 20160180554Abstract: A method includes receiving at least two sets of noisy basis material line integrals, each set corresponding to a different basis material and filtering the at least two sets of noisy basis material line integrals with an anti-correlation filter that at least includes a regularization term with balancing regularization factors, thereby producing de-noised basis material line integrals. An imaging system (100) includes a projection data processor (116) with an anti-correlation filter (118) that filters at least two sets of noisy basis material line integrals, each set corresponding to a different basis material, thereby producing de-noised basis material line integrals, wherein the anti-correlation filter includes a regularization term with regularization balancing factors.Type: ApplicationFiled: August 29, 2014Publication date: June 23, 2016Inventor: Bernhard Johannes Brendel
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Publication number: 20160140725Abstract: Image processing methods and related apparatuses (SEG,UV). The apparatuses (SEG,UV) operate to utilize noise signal information in images (IM). According to one aspect, apparatus (SEG) uses the noise information (FX) to control a model based segmentation. According to a further aspect, apparatus (UV) operates, based on the noise information (FX), to visualize the uncertainty of image information that resides at edge portions of the or an image (IM).Type: ApplicationFiled: June 26, 2014Publication date: May 19, 2016Applicant: KONINKLIJKE PHILIPS N.V.Inventors: Frank BERGNER, Rolf Dieter BIPPUS, Bernhard Johannes BRENDEL, Michael GRASS, Cristian LORENZ, Thomas KOEHLER
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Patent number: 9299169Abstract: A method includes reconstructing measured projection data using an iterative statistical reconstruction algorithm that reduces image artifact caused by differences in variances in projections of the measured projection data used to update a voxel of the image for one or more voxels of the image. A reconstructor includes a processor that reconstructs measured projection data using an iterative statistical reconstruction algorithm that reduces or mitigates image artifact caused by differences in variances in projections used to update a voxel of the image for one or more voxels of the image. A computer readable storage medium encoded with computer executable instructions, which, when executed by a processor of a computer, cause the processor to: reduce image artifact caused by differences in variances in projections used to update a voxel of an image for one or more voxels of the image using an iterative statistical reconstruction algorithm.Type: GrantFiled: November 25, 2011Date of Patent: March 29, 2016Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Bernhard Johannes Brendel, Thomas Koehler, Holger Schmitt, Rolf Dieter Bippus, Roland Proksa
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Patent number: 9230348Abstract: The noise of a detection value acquired by an imaging system (30) can depend on the contributions of different components within a region of interest to be imaged, which has been traversed by radiation (4) causing the respective acquired detection value. This dependence is considered while iteratively reconstructing an image of the region of interest, wherein first component attenuation values, which correspond to elements of a first component within the region of interest, and second component attenuation values, which correspond to elements of a first component within the region of interest, are determined, wherein noise values are determined from the first component attenuation values and the second component attenuation values and wherein the noise values are used for updating the image. This consideration of the dependence of the noise of an acquired detection value on the different components improves the quality of the iteratively reconstructed image.Type: GrantFiled: December 15, 2011Date of Patent: January 5, 2016Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Roland Proksa, Bernhard Johannes Brendel, Thomas Koehler
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Publication number: 20150279005Abstract: This application describes an approach to filter, solely in the projection domain, correlated noise from (or de-noise) spectral/multi-energy projection data. As described herein, this can be achieved based at least on variances of the basis material line integrals and a covariance there between, based on multiple correlation coefficients and hyper-planes that describe the noise correlation between different basis material line integrals, and/or otherwise.Type: ApplicationFiled: November 7, 2013Publication date: October 1, 2015Inventors: Bernhard Johannes Brendel, Gilad Shechter
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Patent number: 9076191Abstract: A processing component (122) processes images based on an iterative reconstruction algorithm with regularization and/or de-noising algorithm. The processing component includes a set point determiner (224) that determines a quality set point (216) between predetermined lower and upper quality bounds (226) based on a quality variable (228) indicative of an image quality of interest. The processing component further includes a comparator (214) that compares, each processing iteration, a quality metric of a current generated image with the quality set point and generates a difference value indicative of a difference between the quality metric and the quality set point.Type: GrantFiled: December 4, 2012Date of Patent: July 7, 2015Assignee: Koninklijke Philips N.V.Inventors: Frank Bergner, Bernhard Johannes Brendel, Thomas Koehler
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Publication number: 20150124927Abstract: A method includes obtaining a dark-field signal generated from a dark-field CT scan of an object, wherein the dark-field CT scan is at least a 360 degree scan. The method further includes weighting the dark-field signal. The method further includes performing a cone beam reconstruction of the weighted dark-field signal over the 360 degree scan, thereby generating volumetric image data. For an axial cone-beam CT scan, in one non-limiting instance, the cone-beam reconstruction is a full scan FDK cone beam reconstruction. For a helical cone-beam CT scan, in one non-limiting instance, the dark-field signal is rebinned to wedge geometry and the cone-beam reconstruction is a full scan aperture weighted wedge reconstruction. For a helical cone-beam CT scan, in another non-limiting instance, the dark-field signal is rebinned to wedge geometry and the cone-beam reconstruction is a full scan angular weighted wedge reconstruction.Type: ApplicationFiled: May 13, 2013Publication date: May 7, 2015Inventors: Thomas Koehler, Bernhard Johannes Brendel, Ewald Roessl, Udo van Stevendaal
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Patent number: 9002090Abstract: The invention relates to a forward projection apparatus for performing a forward projection through an image (22), wherein at least one of a number of rays (20, 21) for performing the forward projection, a ray spacing between the rays and a kernel width of an interpolation kernel for calculating interpolated values located on the rays is varied depending on the ray width relative to an effective image element spacing between image elements (24) of the image. This allows reducing artifacts in simulated projection data and, thus, in an image, which is iteratively reconstructed by using the simulated projection data. For example, if the number of provided rays and/or the ray spacing between the provided rays is varied, aliasing artifacts can be reduced. Moreover, if the ray spacing between the provided rays and/or the kernel width of the interpolation kernel is varied, artifacts caused by varying effective kernel widths may be reduced.Type: GrantFiled: November 16, 2011Date of Patent: April 7, 2015Assignee: Koninklijke Philips N.V.Inventors: Thomas Koehler, Bernhard Johannes Brendel, Holger Schmitt, Rolf Dieter Bippus
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Publication number: 20150023471Abstract: A double focal spot X-ray tube (104) is used to acquire a set of two images PI?, PI? for a given gantry position from slightly different view positions. The stereo or binocular disparity (BD) of imaged structures is used to estimate the object depth in view direction, which in turn is used to discriminate between objects inside IO and outside EO the body. Respective structures are virtually removed from the images PI?, PI?.Type: ApplicationFiled: March 4, 2013Publication date: January 22, 2015Applicant: Koninklijke Philips N.V.Inventors: Cristian Lorenz, Michael Grass, Dirk Schäfer, Bernhard Johannes Brendel