Patents by Inventor Hans Bornefalk
Hans Bornefalk 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).
-
Patent number: 11397268Abstract: There is provided an edge-on x-ray detector configured for detecting incoming x-rays. The edge-on x-ray detector includes a plurality of adjacent x-ray sensors, and each x-ray sensor is oriented edge-on to incoming x-rays. The x-ray sensors are arranged side-by-side and/or lined up one after the other, and the interspacing between the x-ray sensors is at least partly filled with a gap filling material including a mixture or compound of resin and metal disulfide.Type: GrantFiled: April 22, 2021Date of Patent: July 26, 2022Assignee: PRISMATIC SENSORS ABInventors: Torbjörn Hjärn, Hans Bornefalk, Martin Sjölin
-
Patent number: 11246559Abstract: Disclosed is a calibration phantom for an x-ray imaging system having an x-ray source and an x-ray detector. The calibration phantom includes a combination of geometric objects of at least three different types and/or compositions including: a first object located in the middle, including a first material; a plurality of second objects arranged around the periphery of the first object, at least a subset of the second objects including a second material different than the first material, wherein the first object is relatively larger than the second objects; a plurality of third objects arranged around the periphery of the first object and/or around the periphery of at least a subset of the second objects, at least a subset of the third objects including a third material different than the first material and the second material, wherein the third objects are relatively smaller than the second objects.Type: GrantFiled: January 28, 2020Date of Patent: February 15, 2022Assignee: PRISMATIC SENSORS ABInventors: Hans Bornefalk, Fredrik Grönberg
-
Patent number: 11123026Abstract: An x-ray imaging apparatus includes an x-ray source and detector with multiple detector elements. The source and detector are on a support that rotates around a subject, enabling projections at different view angles. The apparatus operates the x-ray source in switched kVp mode for alternately applying different voltages, including lower and higher voltages, during rotation to enable lower-energy and higher-energy exposures over the projections, providing for lower-energy projections and higher-energy projections. The x-ray detector is a photon-counting multi-bin detector allocating photon counts to multiple energy bins, and the apparatus selects counts from at least a subset of the bins to provide corresponding photon count information for both lower- and higher-energy projections.Type: GrantFiled: December 6, 2019Date of Patent: September 21, 2021Assignee: PRISMATIC SENSORS ABInventors: Hans Bornefalk, Fredrik Grönberg, Mats Danielsson
-
Publication number: 20210278554Abstract: There is provided an edge-on x-ray detector configured for detecting incoming x-rays. The edge-on x-ray detector includes a plurality of adjacent x-ray sensors, and each x-ray sensor is oriented edge-on to incoming x-rays. The x-ray sensors are arranged side-by-side and/or lined up one after the other, and the interspacing between the x-ray sensors is at least partly filled with a gap filling material including a mixture or compound of resin and metal disulfide.Type: ApplicationFiled: April 22, 2021Publication date: September 9, 2021Inventors: Torbjörn HJÄRN, Hans BORNEFALK, Martin SJÖLIN
-
Patent number: 11086032Abstract: There is provided an edge-on x-ray detector configured for detecting incoming x-rays. The edge-on x-ray detector includes a plurality of adjacent x-ray sensors, and each x-ray sensor is oriented edge-on to incoming x-rays. The x-ray sensors are arranged side-by-side and/or lined up one after the other, and the interspacing between the x-ray sensors is at least partly filled with a gap filling material including a mixture or compound of resin and metal disulfide.Type: GrantFiled: March 4, 2020Date of Patent: August 10, 2021Assignee: PRISMATIC SENSORS ABInventors: Torbjörn Hjärn, Hans Bornefalk, Martin Sjölin
-
Publication number: 20200261041Abstract: An x-ray imaging apparatus includes an x-ray source and detector with multiple detector elements. The source and detector are on a support that rotates around a subject, enabling projections at different view angles. The apparatus operates the x-ray source in switched kVp mode for alternately applying different voltages, including lower and higher voltages, during rotation to enable lower-energy and higher-energy exposures over the projections, providing for lower-energy projections and higher-energy projections. The x-ray detector is a photon-counting multi-bin detector allocating photon counts to multiple energy bins, and the apparatus selects counts from at least a subset of the bins to provide corresponding photon count information for both lower- and higher-energy projections.Type: ApplicationFiled: December 6, 2019Publication date: August 20, 2020Inventors: Hans BORNEFALK, Fredrik GRÖNBERG, Mats DANIELSSON
-
Publication number: 20200261050Abstract: Disclosed is a calibration phantom for an x-ray imaging system having an x-ray source and an x-ray detector. The calibration phantom includes a combination of geometric objects of at least three different types and/or compositions including: a first object located in the middle, including a first material; a plurality of second objects arranged around the periphery of the first object, at least a subset of the second objects including a second material different than the first material, wherein the first object is relatively larger than the second objects; a plurality of third objects arranged around the periphery of the first object and/or around the periphery of at least a subset of the second objects, at least a subset of the third objects including a third material different than the first material and the second material, wherein the third objects are relatively smaller than the second objects.Type: ApplicationFiled: January 28, 2020Publication date: August 20, 2020Inventors: Hans BORNEFALK, Fredrik GRÖNBERG
-
Patent number: 10176602Abstract: There is provided a method of image reconstruction based on energy-resolved image data from a photon-counting multi-bin detector or an intermediate storage. The method includes processing (S1) the energy-resolved image data by performing at least two separate basis decompositions using different number of basis functions for modeling linear attenuation, wherein a first basis decomposition is performed using a first smaller set of basis functions to obtain at least one first basis image representation, and wherein a second basis decomposition is performed using a second larger set of basis functions to obtain at least one second basis image representation. The method also includes reconstructing a first image based on the at least one first basis image representation obtained from the first basis decomposition, and combining the first image with information representative of the at least one second basis image representation.Type: GrantFiled: October 30, 2017Date of Patent: January 8, 2019Assignee: PRISMATIC SENSORS ABInventors: Fredrik Gronberg, Mats Persson, Hans Bornefalk
-
Publication number: 20180068464Abstract: There is provided a method of image reconstruction based on energy-resolved image data from a photon-counting multi-bin detector or an intermediate storage. The method includes processing (Si) the energy-resolved image data by performing at least two separate basis decompositions using different number of basis functions for modeling linear attenuation, wherein a first basis decomposition is performed using a first smaller set of basis functions to obtain at least one first basis image representation, and wherein a second basis decomposition is performed using a second larger set of basis functions to obtain at least one second basis image representation. The method also includes reconstructing a first image based on the at least one first basis image representation obtained from the first basis decomposition, and combining the first image with information representative of the at least one second basis image representation.Type: ApplicationFiled: October 30, 2017Publication date: March 8, 2018Inventors: Fredrik GRONBERG, Mats PERSSON, Hans BORNEFALK
-
Patent number: 9870628Abstract: There is provided a method of image reconstruction based on energy-resolved image data from a photon-counting multi-bin detector or an intermediate storage. The method comprises processing (S1) the energy-resolved image data by performing at least two separate basis decompositions using different number of basis functions for modeling linear attenuation, wherein a first basis decomposition is performed using a first smaller set of basis functions to obtain at least one first basis image representation, and wherein a second basis decomposition is performed using a second larger set of basis functions to obtain at least one second basis image representation. The method also comprises reconstructing a first image based on said at least one first basis image representation obtained from the first basis decomposition, and combining the first image with information representative of said at least one second basis image representation.Type: GrantFiled: March 18, 2015Date of Patent: January 16, 2018Assignee: Prismatic Sensors ABInventors: Fredrik Gronberg, Mats Persson, Hans Bornefalk
-
Patent number: 9867580Abstract: There is provided a method and corresponding system and apparatus for image reconstruction based on image data from a photon-counting multi-bin x-ray detector. The method includes determining (S1) parameter(s) of a given functional form of the relationship between comparator settings expressed in voltage in the read-out chain of the x-ray detector and the corresponding energy threshold values expressed in energy based on a fitting procedure between a first set of data representative of a measured pulse height spectrum and a second set of data representative of a reference pulse height spectrum. The method also includes performing (S2) image reconstruction based on the image data and the determined parameter(s). In this way, efficient high-quality image reconstruction can be achieved.Type: GrantFiled: November 10, 2014Date of Patent: January 16, 2018Assignee: PRISMATIC SENSORS ABInventors: Mats Danielsson, Hans Bornefalk, Xuejin Liu, Ben Huber, Han Chen
-
Publication number: 20170273640Abstract: There is provided a method and corresponding system and apparatus for image reconstruction based on image data from a photon-counting multi-bin x-ray detector. The method includes determining (S1) parameter(s) of a given functional form of the relationship between comparator settings expressed in voltage in the read-out chain of the x-ray detector and the corresponding energy threshold values expressed in energy based on a fitting procedure between a first set of data representative of a measured pulse height spectrum and a second set of data representative of a reference pulse height spectrum. The method also includes performing (S2) image reconstruction based on the image data and the determined parameter(s). In this way, efficient high-quality image reconstruction can be achieved.Type: ApplicationFiled: November 10, 2014Publication date: September 28, 2017Inventors: Mats DANIELSSON, Hans BORNEFALK, Xuejin LIU, Ben HUBER, Han CHEN
-
Publication number: 20170270692Abstract: There is provided a method of image reconstruction based on energy-resolved image data from a photon-counting multi-bin detector or an intermediate storage. The method comprises processing (S1) the energy-resolved image data by performing at least two separate basis decompositions using different number of basis functions for modeling linear attenuation, wherein a first basis decomposition is performed using a first smaller set of basis functions to obtain at least one first basis image representation, and wherein a second basis decomposition is performed using a second larger set of basis functions to obtain at least one second basis image representation. The method also comprises reconstructing a first image based on said at least one first basis image representation obtained from the first basis decomposition, and combining the first image with information representative of said at least one second basis image representation.Type: ApplicationFiled: March 18, 2015Publication date: September 21, 2017Applicant: Prismatic Sensors ABInventors: Fredrik GRONBERG, Mats PERSSON, Hans BORNEFALK
-
Patent number: 8378310Abstract: The current invention applies to photon counting silicon x-ray detectors with energy discriminating capabilities and applications in x-ray imaging systems. The overall image quality produced by such a system is improved by the presented novel methods for optimally using the energy information in Compton events and making selective use of counts induced from charges collected in neighboring pixels. The pile-up problem during high-flux imaging regimes is reduced by a novel method for signal reset, which improves the count efficiency by reducing the risk of losing event due to signal pile-up in the read out electronics chain.Type: GrantFiled: February 17, 2010Date of Patent: February 19, 2013Assignee: Prismatic Sensors ABInventors: Hans Bornefalk, Mats Danielsson, Christer Svensson
-
Publication number: 20100215230Abstract: The current invention applies to photon counting silicon x-ray detectors with energy discriminating capabilities and applications in x-ray imaging systems. The overall image quality produced by such a system is improved by the presented novel methods for optimally using the energy information in Compton events and making selective use of counts induced from charges collected in neighboring pixels. The pile-up problem during high-flux imaging regimes is reduced by a novel method for signal reset, which improves the count efficiency by reducing the risk of losing event due to signal pile-up in the read out electronics chain.Type: ApplicationFiled: February 17, 2010Publication date: August 26, 2010Applicant: MATS DANIELSSONInventors: Hans BORNEFALK, Mats Danielsson, Christer Svensson
-
Publication number: 20080212864Abstract: The present invention relates to a method and arrangement for detecting a Region of Interest in an image data set, especially digitalized X-ray image. The method comprises the steps of: extracting phase information from the image data, using said phase information for differentiating between different lines and edges, and skewing said lines towards a centre.Type: ApplicationFiled: February 14, 2005Publication date: September 4, 2008Applicant: SECTRA MAMEA ABInventor: Hans Bornefalk