Patents by Inventor Martin Sjolin
Martin Sjolin 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: 11726215Abstract: There is provided a circuit (502; 503; 504) configured for operation with a multi-bin photon-counting x-ray detector (20) having multiple energy thresholds, wherein said circuit (502; 503; 504) is configured to obtain or generate several Total Time-Over-Threshold (TTOT) signals corresponding to several different energy thresholds, and provide energy integrating information based on said several TTOT signals.Type: GrantFiled: November 23, 2021Date of Patent: August 15, 2023Assignee: Prismatic Sensors ABInventor: Martin Sjölin
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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
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Publication number: 20220082710Abstract: There is provided a circuit (502; 503; 504) configured for operation with a multi-bin photon-counting x-ray detector (20) having multiple energy thresholds, wherein said circuit (502; 503; 504) is configured to obtain or generate several Total Time-Over-Threshold (TTOT) signals corresponding to several different energy thresholds, and provide energy integrating information based on said several TTOT signals.Type: ApplicationFiled: November 23, 2021Publication date: March 17, 2022Inventor: Martin SJÖLIN
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Patent number: 11255981Abstract: There is provided a circuit (502; 503; 504) configured for operation with a multi-bin photon-counting x-ray detector (20) having multiple energy thresholds, wherein said circuit (502; 503; 504) is configured to obtain or generate several Total Time-Over-Threshold (TTOT) signals corresponding to several different energy thresholds, and provide energy integrating information based on said several TTOT signals.Type: GrantFiled: November 9, 2020Date of Patent: February 22, 2022Assignee: PRISMATIC SENSORS ABInventor: Martin Sjölin
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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
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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
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Publication number: 20210239856Abstract: There is provided a circuit (502; 503; 504) configured for operation with a multi-bin photon-counting x-ray detector (20) having multiple energy thresholds, wherein said circuit (502; 503; 504) is configured to obtain or generate several Total Time-Over-Threshold (TTOT) signals corresponding to several different energy thresholds, and provide energy integrating information based on said several TTOT signals.Type: ApplicationFiled: November 9, 2020Publication date: August 5, 2021Inventor: Martin SJÖLIN
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Patent number: 10610191Abstract: Disclosed is a method for management of geometric misalignment in an x-ray imaging system having an x-ray source, a photon-counting x-ray detector and an intermediate collimator structure in the x-ray path between the x-ray source and the x-ray detector. The x-ray detector includes a plurality of pixels, and the collimator structure includes a plurality of collimator cells, wherein each of at least a subset of the collimator cells corresponds to a N×M matrix of pixels, where at least one of N and M is greater than one. The method includes monitoring, for a designated subset of pixels including at least two pixels that are affected differently by shadowing from the collimator structure due to geometric misalignment, output signals from the pixels of the designated subset, and determining the occurrence of geometric misalignment based on the monitored output signals from the pixels of the designated subset of pixels.Type: GrantFiled: July 6, 2017Date of Patent: April 7, 2020Assignee: PRISMATIC SENSORS ABInventors: Martin Sjolin, Xuejin Liu, Mats Danielsson
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Patent number: 10575801Abstract: A photon-counting detector includes a first subset of detector modules and at least one second subset of detector modules. Each detector module has power-consuming circuitry. Power-consuming circuitry of detector modules in the first subset is configured, in an operational mode in which the detector modules are powered on, to consume a first amount of power. Correspondingly, power-consuming circuitry of detector modules in the at least one second subset is configured, in the operational mode, to consume a second amount of power that is lower than the first amount of power.Type: GrantFiled: June 8, 2017Date of Patent: March 3, 2020Assignee: PRISMATIC SENSORS ABInventors: Mats Danielsson, Staffan Karlsson, Xuejin Liu, Martin Sjölin, Anders Björklid, Torbjörn Hjärn
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Patent number: 10271803Abstract: Disclosed is a measurement method performed by a Computed Tomography, CT, system. The CT system includes an x-ray source (60) and an x-ray detector (50) array of photon counting edge-on detectors (5), wherein each photon counting edge-on detector has a number of depth-segments, also referred to as detector elements, arranged at different spatial locations in the direction of incoming x-rays (45). The method includes to apply a time offset measurement scheme that provides a time offset between measurement periods for at least two different detector elements located at different depths, wherein the time offset is chosen so that at least two measurement periods at least partially overlaps in time. Disclosed is also a corresponding CT system (10), a control unit for a CT system and a measurement circuit for a CT system. A computer program (225) controlling a CT system is also disclosed. The disclosed technology provides for a higher sampling frequency in the angular direction (55).Type: GrantFiled: November 12, 2015Date of Patent: April 30, 2019Assignee: PRISMATIC SENSORS ABInventor: Martin Sjolin
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Patent number: 10247833Abstract: There is provided a measurement circuit (30) for an x-ray detector (5). The measurement circuit (30) is configured to sample measurement data to generate data points and process the data points before read-out to produce new data points by combining two or more data points which have been acquired at different times such that the number of data points for read-out are less than the number of original data points.Type: GrantFiled: May 3, 2016Date of Patent: April 2, 2019Assignee: PRISMATIC SENSORS ABInventor: Martin Sjolin
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Patent number: 10191162Abstract: Disclosed is a detector system for x-ray imaging. The detector system includes a detector having a plurality of edge-on detector modules. Each of the edge-on detector modules includes a first edge that is adapted to be oriented towards an x-ray source and a front-side running essentially parallel to the direction of incoming x-rays. The front-side includes at least one charge collecting electrode. At least a subset of the plurality of edge-on detector modules being pairwise arranged, front-side to front-side, whereby a front-side to front-side gap is defined between the front-sides of the pairwise arranged edge-on detector modules. The pairwise arranged edge-on detector modules are associated with an anti-scatter collimator arranged in the x-ray path between the x-ray source and the edge-on detector modules and overlapping the front-side to front-side gap.Type: GrantFiled: May 5, 2017Date of Patent: January 29, 2019Assignee: PRISMATIC SENSORS ABInventors: Mats Danielsson, Staffan Karlsson, Cheng Xu, Martin Sjolin
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Publication number: 20190008474Abstract: Disclosed is a method for management of geometric misalignment in an x-ray imaging system having an x-ray source, a photon-counting x-ray detector and an intermediate collimator structure in the x-ray path between the x-ray source and the x-ray detector. The x-ray detector includes a plurality of pixels, and the collimator structure includes a plurality of collimator cells, wherein each of at least a subset of the collimator cells corresponds to a N×M matrix of pixels, where at least one of N and M is greater than one. The method includes monitoring, for a designated subset of pixels including at least two pixels that are affected differently by shadowing from the collimator structure due to geometric misalignment, output signals from the pixels of the designated subset, and determining the occurrence of geometric misalignment based on the monitored output signals from the pixels of the designated subset of pixels.Type: ApplicationFiled: July 6, 2017Publication date: January 10, 2019Inventors: Martin SJOLIN, Xuejin LIU, Mats DANIELSSON
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Patent number: 10143417Abstract: There is provided an arrangement (100) for enabling assessment of scoliosis. The arrangement (100) is configured to obtain at least one x-ray image by means of one or more photon-counting x-ray detectors. The arrangement (100) is further configured to determine at least one characteristic of the spine of a patient having possible scoliosis based on said at least one x-ray image obtained by means of the photon-counting x-ray detector(s) to enable assessment of scoliosis.Type: GrantFiled: February 13, 2017Date of Patent: December 4, 2018Assignee: PRISMATIC SENSORS ABInventors: Mats Danielsson, Xuejin Liu, Martin Sjolin
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Patent number: 10130313Abstract: There is provided a method and corresponding system for data acquisition, for Computed Tomography, CT, based on an x-ray imaging system (10) having a detector (12) with a plurality of pixels (13), wherein data sampling is performed with a temporal offset between measurements acquired by adjacent pixels of the detector.Type: GrantFiled: May 15, 2017Date of Patent: November 20, 2018Assignee: PRISMATIC SENSORS ABInventors: Martin Sjolin, Mats Persson
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Publication number: 20180321394Abstract: Disclosed is a detector system for x-ray imaging. The detector system includes a detector having a plurality of edge-on detector modules. Each of the edge-on detector modules includes a first edge that is adapted to be oriented towards an x-ray source and a front-side running essentially parallel to the direction of incoming x-rays. The front-side includes at least one charge collecting electrode. At least a subset of the plurality of edge-on detector modules being pairwise arranged, front-side to front-side, whereby a front-side to front-side gap is defined between the front-sides of the pairwise arranged edge-on detector modules. The pairwise arranged edge-on detector modules are associated with an anti-scatter collimator arranged in the x-ray path between the x-ray source and the edge-on detector modules and overlapping the front-side to front-side gap.Type: ApplicationFiled: May 5, 2017Publication date: November 8, 2018Inventors: Mats DANIELSSON, Staffan KARLSSON, Cheng XU, Martin SJOLIN
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Publication number: 20180252821Abstract: Disclosed is an x-ray detector system including a multitude of detector elements, each connected to a respective photon counting channel for providing at least one photon count output, and a read-out unit connected to the photon counting channels for outputting the photon count outputs. Each one of at least a subset of the photon counting channels includes at least two photon counting sub-channels, each photon counting sub-channel providing at least one photon count output and having a shaping filter, wherein the shaping filters of the photon counting sub-channels are configured with different shaping times, and wherein the photon counting sub-channels, having shaping filters with different shaping times, are adapted for counting photons of different energy levels. Furthermore, the read-out unit is configured to select, for each photon counting channel, photon count outputs from the photon counting sub-channels.Type: ApplicationFiled: March 6, 2017Publication date: September 6, 2018Inventors: Christer SVENSSON, Mats PERSSON, Martin SJOLIN, Mats DANIELSSON
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Publication number: 20180252822Abstract: Disclosed is an x-ray detector system including a multitude of detector elements, each connected to a respective photon counting channel for providing at least one photon count output, and a read-out unit connected to the photon counting channels for outputting the photon count outputs. Each one of at least a subset of the photon counting channels includes at least two photon counting sub-channels, each photon counting sub-channel providing at least one photon count output and having a shaping filter, wherein the shaping filters of the photon counting sub-channels are configured with different shaping times, and wherein the photon counting sub-channels, having shaping filters with different shaping times, are adapted for counting photons of different energy levels. Furthermore, the read-out unit is configured to select, for each photon counting channel, photon count outputs from the photon counting sub-channels.Type: ApplicationFiled: January 29, 2018Publication date: September 6, 2018Inventors: Christer SVENSSON, Mats PERSSON, Martin SJOLIN, Mats DANIELSSON
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Patent number: 10067240Abstract: Disclosed is an x-ray detector system including a multitude of detector elements, each connected to a respective photon counting channel for providing at least one photon count output, and a read-out unit connected to the photon counting channels for outputting the photon count outputs. Each one of at least a subset of the photon counting channels includes at least two photon counting sub-channels, each photon counting sub-channel providing at least one photon count output and having a shaping filter, wherein the shaping filters of the photon counting sub-channels are configured with different shaping times, and wherein the photon counting sub-channels, having shaping filters with different shaping times, are adapted for counting photons of different energy levels. Furthermore, the read-out unit is configured to select, for each photon counting channel, photon count outputs from the photon counting sub-channels.Type: GrantFiled: March 6, 2017Date of Patent: September 4, 2018Assignee: PRISMATIC SENSORS ABInventors: Christer Svensson, Mats Persson, Martin Sjolin, Mats Danielsson
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Patent number: 10048390Abstract: There is provided an x-ray detector including a number of adjacent detector modules arranged in a configuration having central parts and peripheral parts. The x-ray detector is configured to have higher dose efficiency in the central parts and lower dose efficiency in the peripheral parts.Type: GrantFiled: May 15, 2017Date of Patent: August 14, 2018Assignee: PRISMATIC SENSORS ABInventors: Mats Danielsson, Mats Persson, Martin Sjolin