Patents by Inventor Heinrich Riem
Heinrich Riem 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: 9620256Abstract: An x-ray imaging device includes an anti-scatter grid placed inside the housing of the imaging device and adjacent to an x-ray detector.Type: GrantFiled: September 2, 2014Date of Patent: April 11, 2017Assignees: Varian Medical Systems, Inc., Varian Medical Systems International AGInventors: Gary Virshup, Heinrich Riem
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Patent number: 9400332Abstract: An imaging method includes obtaining a first image data for a subset of a target region, the subset of the target region having a first metallic object, obtaining a second image data for the target region, and using the first and second image data to determine a composite image. A imaging system includes a first detector configured to provide a first projection data using a first radiation having high energy, and a second detector configured to provide a second projection data using a second radiation having low energy, wherein the first detector has a first length, the second detector has a second length, and the first length is less than 75% of the second length.Type: GrantFiled: December 23, 2013Date of Patent: July 26, 2016Assignees: VARIAN MEDICAL SYSTEMS INTERNATIONAL AG, VARIAN MEDICAL SYSTEMS, INC.Inventors: Josh Star-Lack, Michael Green, Heinrich Riem, Timothy Guertin
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Publication number: 20150085990Abstract: An x-ray imaging device includes an anti-scatter grid placed inside the housing of the imaging device and adjacent to an x-ray detector.Type: ApplicationFiled: September 2, 2014Publication date: March 26, 2015Inventors: Gary Virshup, Heinrich Riem
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Patent number: 8803061Abstract: Circuitry and method for collecting image array data in which pixels are addressed and dynamically clamped separately. In accordance with one embodiment, pixels are addressed and clamped during different time intervals, thereby allowing faster pixel data readout while still allowing sufficient time to remove all pixel charges.Type: GrantFiled: July 16, 2012Date of Patent: August 12, 2014Assignee: Varian Medical Systems International AGInventors: Michael Stamm, Harold Mikula, Daniel Morf, Heinrich Riem, Victor Steinlin
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Publication number: 20140110594Abstract: An imaging method includes obtaining a first image data for a subset of a target region, the subset of the target region having a first metallic object, obtaining a second image data for the target region, and using the first and second image data to determine a composite image. A imaging system includes a first detector configured to provide a first projection data using a first radiation having high energy, and a second detector configured to provide a second projection data using a second radiation having low energy, wherein the first detector has a first length, the second detector has a second length, and the first length is less than 75% of the second length.Type: ApplicationFiled: December 23, 2013Publication date: April 24, 2014Applicants: VARIAN MEDICAL SYSTEMS INTERNATIONAL AG, VARIAN MEDICAL SYSTEMS, INC.Inventors: Josh STAR-LACK, Michael GREEN, Heinrich RIEM, Timothy GUERTIN
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Patent number: 8633445Abstract: An imaging method includes obtaining a first image data for a subset of a target region, the subset of the target region having a first metallic object, obtaining a second image data for the target region, and using the first and second image data to determine a composite image. A imaging system includes a first detector configured to provide a first projection data using a first radiation having high energy, and a second detector configured to provide a second projection data using a second radiation having low energy, wherein the first detector has a first length, the second detector has a second length, and the first length is less than 75% of the second length.Type: GrantFiled: May 19, 2008Date of Patent: January 21, 2014Assignees: Varian Medical Systems, Inc., Varian Medical Systems International AGInventors: Josh Star-Lack, Michael Green, Heinrich Riem, Timothy Guertin
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Publication number: 20140014814Abstract: Circuitry and method for collecting image array data in which pixels are addressed and dynamically clamped separately. In accordance with one embodiment, pixels are addressed and clamped during different time intervals, thereby allowing faster pixel data readout while still allowing sufficient time to remove all pixel charges.Type: ApplicationFiled: July 16, 2012Publication date: January 16, 2014Applicant: VARIAN MEDICAL SYSTEMS INTERNATIONAL AGInventors: Michael STAMM, Harald MIKULA, Daniel MORF, Heinrich RIEM, Viktor STEINLIN
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Publication number: 20090283682Abstract: An imaging method includes obtaining a first image data for a subset of a target region, the subset of the target region having a first metallic object, obtaining a second image data for the target region, and using the first and second image data to determine a composite image. A imaging system includes a first detector configured to provide a first projection data using a first radiation having high energy, and a second detector configured to provide a second projection data using a second radiation having low energy, wherein the first detector has a first length, the second detector has a second length, and the first length is less than 75% of the second length.Type: ApplicationFiled: May 19, 2008Publication date: November 19, 2009Inventors: Josh Star-Lack, Michael Green, Heinrich Riem, Timothy Guertin
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Patent number: 7561665Abstract: A dual pulse imaging method is provided comprising the steps of generating a first image of a region of interest by a first pulse delivering a first dose, generating a second image of the region of interest by a second pulse delivering a second dose different from the first dose, and computing a third image of the region of interest using data from the first and second images. A threshold can be identified for determining data from the first and second images to be used in computing the third image. A dual pulse imaging system is also provided.Type: GrantFiled: April 18, 2006Date of Patent: July 14, 2009Assignee: Varian Medical Systems, Inc.Inventors: Govin Dasani, Wolfgang Kaissl, Evangelos Matsinos, Daniel Morf, Heinrich Riem
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Patent number: 7397904Abstract: Devices and methods for implementing selective, or asymmetric, attenuation of an x-ray beam. In one example, a filter is provided that is substantially in the form of a wedge where some portions of the filter are thicker, and thus provide greater attenuation, than other, thinner portions of the filter. The filter is situated between the target surface of the anode and the x-ray subject so that x-rays generated by the target pass through the filter before reaching the x-ray subject. Specifically, the filter is oriented so that the thicker portion of the filter receives the higher intensity portion of the x-ray beam, while the thinner portion of the filter receives the relatively lower intensity portion of the x-ray beam. Thus, the gain profile of the x-ray beam is flattened so that the intensity, or flux, of the x-ray beam is relatively uniform throughout a substantial portion of the beam profile.Type: GrantFiled: May 11, 2005Date of Patent: July 8, 2008Assignee: Varian Medical Systems Technologies, Inc.Inventors: Gary Virshup, James Boye, Edward J. Seppi, Heinrich Riem, Govin Dasani, Edward Shapiro
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Publication number: 20070081628Abstract: A dual pulse imaging method is provided comprising the steps of generating a first image of a region of interest by a first pulse delivering a first dose, generating a second image of the region of interest by a second pulse delivering a second dose different from the first dose, and computing a third image of the region of interest using data from the first and second images. A threshold can be identified for determining data from the first and second images to be used in computing the third image. A dual pulse imaging system is also provided.Type: ApplicationFiled: April 18, 2006Publication date: April 12, 2007Inventors: Govin Dasani, Wolfgang Kaissl, Evangelos Matsinos, Daniel Morf, Heinrich Riem
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Publication number: 20060256925Abstract: Devices and methods for implementing selective, or asymmetric, attenuation of an x-ray beam. In one example, a filter is provided that is substantially in the form of a wedge where some portions of the filter are thicker, and thus provide greater attenuation, than other, thinner portions of the filter. The filter is situated between the target surface of the anode and the x-ray subject so that x-rays generated by the target pass through the filter before reaching the x-ray subject. Specifically, the filter is oriented so that the thicker portion of the filter receives the higher intensity portion of the x-ray beam, while the thinner portion of the filter receives the relatively lower intensity portion of the x-ray beam. Thus, the gain profile of the x-ray beam is flattened so that the intensity, or flux, of the x-ray beam is relatively uniform throughout a substantial portion of the beam profile.Type: ApplicationFiled: May 11, 2005Publication date: November 16, 2006Inventors: Gary Virshup, James Boye, Edward Seppi, Heinrich Riem, Govin Dasani, Edward Shapiro
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Patent number: 5631470Abstract: The present invention provides electrode assemblies for LIC imagers that maximize ion collection and the electric field for the minimum bias voltage. To achieve this optimization the ion collection is confined to small regions. Due to this limited ion collection region, high neutralization efficiencies and fast sweep-out times can be obtained. Furthermore, with an electrode separation of approximately 0.1 millimeters, pulse voltages of less than 100 volts can be used. Low voltages result in improved reliability, longer system life, and lower safety risks.Type: GrantFiled: May 13, 1996Date of Patent: May 20, 1997Assignee: Varian Associates, Inc.Inventors: Derek J. Day, Reza Majidi-Ahy, Willi Fencl, Heinrich Riem, Salvatore Provencale, Rolf Staehelin
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Patent number: 5594252Abstract: A three terminal ionization chamber includes a first electrode coupled to a bias voltage source spaced apart from a second electrode coupled to ground. A third terminal is provided which is positioned between the first and second electrodes. Measurement circuitry may be coupled to the third terminal to measure charge indicative of the amount of radiation incident to the chamber.Type: GrantFiled: November 9, 1995Date of Patent: January 14, 1997Assignee: Varian Associates, Inc.Inventors: Derek J. Day, Rolf Stahelin, Salvatore Provenzale, Heinrich Riem, Willi Fencl