Patents by Inventor Richard Colbeth
Richard Colbeth 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: 9762828Abstract: An imager includes a flat panel configured to collect charges when the imager operates in a full-power charge integration mode. The imager switches to a low-power standby mode immediately after each image acquisition in the full-power charge integration mode. Bias current flowing through the flat panel is monitored in the standby mode. The imager switches to the full-power charge integration mode when detecting a change in the bias current indicating onset of an X-ray exposure.Type: GrantFiled: July 21, 2015Date of Patent: September 12, 2017Assignee: VARIAN MEDICAL SYSTEMS, INC.Inventors: Richard Colbeth, Richard Weisfield, Ivan Mollov, Cesar Proano, Pieter Roos
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Patent number: 9706146Abstract: An imager includes a flat panel configured to collect charges when the imager operates in a full-power charge integration mode. The imager switches to a low-power standby mode immediately after each image acquisition in the full-power charge integration mode. Bias current flowing through the flat panel is monitored in the standby mode. The imager switches to the full-power charge integration mode when detecting a change in the bias current indicating onset of an X-ray exposure.Type: GrantFiled: July 21, 2015Date of Patent: July 11, 2017Assignee: VARIAN MEDICAL SYSTEMS, INC.Inventors: Richard Colbeth, Richard Weisfield, Ivan Mollov, Cesar Proano, Pieter Roos
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Patent number: 9588235Abstract: An x-ray imaging device include a scintillator layer configured to generate light from x-rays, a TFT detector array at the first surface of the scintillator layer to detect light generated in the scintillator, and a CMOS sensor at the second surface of the scintillator layer to detect light generated in the scintillator.Type: GrantFiled: March 28, 2014Date of Patent: March 7, 2017Assignee: Varian Medical Systems, Inc.Inventors: Richard Weisfield, Richard Colbeth, Ivan Mollov, Arundhuti Ganguly
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Publication number: 20160227140Abstract: An imager includes a flat panel configured to collect charges when the imager operates in a full-power charge integration mode. The imager switches to a low-power standby mode immediately after each image acquisition in the full-power charge integration mode. Bias current flowing through the flat panel is monitored in the standby mode. The imager switches to the full-power charge integration mode when detecting a change in the bias current indicating onset of an X-ray exposure.Type: ApplicationFiled: July 21, 2015Publication date: August 4, 2016Inventors: Richard COLBETH, Richard WEISFIELD, Ivan MOLLOV, Cesar PROANO, Pieter ROOS
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Publication number: 20150003584Abstract: An x-ray imaging device include a scintillator layer configured to generate light from x-rays, a TFT detector array at the first surface of the scintillator layer to detect light generated in the scintillator, and a CMOS sensor at the second surface of the scintillator layer to detect light generated in the scintillator.Type: ApplicationFiled: March 28, 2014Publication date: January 1, 2015Applicant: Varian Medical Systems, Inc.Inventors: Richard Weisfield, Richard Colbeth, Ivan Mollov, Arundhuti Ganguly
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Publication number: 20120082294Abstract: An x-ray system includes an x-ray tube having an anode and a cathode, a sensor configured to sense a condition that results from an operation of the x-ray tube, and a communication device for transmitting a signal to a panel based at least in part on the sensed condition, the panel configured to receive radiation and generate image signals in response to the received radiation. An imaging method includes sensing a condition that results from an operation of an x-ray tube, and transmitting a signal to a panel in response to the sensed condition, wherein the panel is configured to generate image signals in response to radiation, and includes a plurality of image elements.Type: ApplicationFiled: October 2, 2010Publication date: April 5, 2012Applicant: VARIAN MEDICAL SYSTEMS, INC.Inventors: Gary Virshup, Robert Kluge, George A. Zdasiuk, Richard Colbeth, Josh Star-Lack, Carl Lacasce, James E. Clayton
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Publication number: 20070170351Abstract: A method and apparatus for excess signal compensation in an imaging system is described. In one particular embodiment, the invention provides for non-linear background, offset (due to time dependent dark current) and/or lag (including constant, linear and non-linear terms, due to image persistence) corrections of large area, flat panel imaging sensors.Type: ApplicationFiled: March 29, 2007Publication date: July 26, 2007Inventors: Larry Partain, Ivan Mollov, Carlo Tognina, Richard Colbeth
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Patent number: 7180366Abstract: Data signal amplification and processing circuitry with multiple signal gains for increasing dynamic signal range. An incoming data signal is processed in accordance with multiple signal gains. The resultant signals have multiple signal values which are compared to predetermined lower and higher thresholds.Type: GrantFiled: November 18, 2005Date of Patent: February 20, 2007Assignee: Varian Medical Systems Technologies, Inc.Inventors: Pieter Gerhard Roos, Edward Seppi, Richard Colbeth, Gary Virshup, Ivan Petrov Mollov
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Publication number: 20070001119Abstract: An imaging system includes a first image element in a first row, a second image element in the first row, a third image element in a second row, the third image element and the first image element being in a first column, a gate driver, a first electrical line extending from the gate driver, wherein the first and the second image elements are connected to the first electrical line, a second electrical line, wherein the first image element is connected to the second electrical line, and a third electrical line, wherein the third image element is connected to the third electrical line.Type: ApplicationFiled: May 22, 2006Publication date: January 4, 2007Applicant: Varian Medical Systems Technologies, Inc.Inventors: Ivan Mollov, Richard Colbeth, Pieter Roos
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Publication number: 20060119427Abstract: Data signal amplification and processing circuitry with multiple signal gains for increasing dynamic signal range. An incoming data signal is processed in accordance with multiple signal gains. The resultant signals have multiple signal values which are compared to predetermined lower and higher thresholds.Type: ApplicationFiled: November 18, 2005Publication date: June 8, 2006Applicant: Varian Medical Systems Technologies, Inc.Inventors: Pieter Roos, Edward Seppi, Richard Colbeth, Gary Virshup, Ivan Mollov
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Patent number: 7002408Abstract: Data signal amplification and processing circuitry with multiple signal gains for increasing dynamic signal range. An incoming data signal is processed in accordance with multiple signal gains. The resultant signals have multiple signal values which are compared to predetermined lower and higher thresholds.Type: GrantFiled: October 15, 2003Date of Patent: February 21, 2006Assignee: Varian Medical Systems Technologies, Inc.Inventors: Pieter Gerhard Roos, Edward Seppi, Richard Colbeth, Gary Virshup, Ivan Petrov Mollov
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Patent number: 6921892Abstract: An apparatus and method for detecting an electrostatic charge on a flat panel imager pixel array. In one embodiment, the apparatus includes an insulator layer and a flat panel pixel array coupled to a bottom surface of the insulator layer. Each pixel of the pixel array has a storage capacitance, and an electrostatic charge corresponding to a voltage applied through an electrode coupled to a top surface of the insulating layer may be detected from each storage capacitance.Type: GrantFiled: December 18, 2002Date of Patent: July 26, 2005Assignee: Varian Medical Systems, Inc.Inventors: Richard Colbeth, George Zentai, Shuji Yamaoka
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Publication number: 20050082488Abstract: A method for collecting signals from a detector that has a plurality of lines of image elements includes sending a control signal to a gate driver to select transistor gates for two or more lines of image elements, and simultaneously passing signals from the two or more lines of image elements to charge amplifiers that are coupled to the image elements. A method for collecting signals from a detector that has a plurality of imagers is provided. Each of the imagers has a plurality of lines of image elements. The method includes sending a control signal to a gate driver to select one or more lines of image elements on each of the plurality of the imagers, and simultaneously passing signals from the selected one or more lines of image elements on each of the plurality of the imagers to charge amplifiers that are coupled to the image elements.Type: ApplicationFiled: October 15, 2003Publication date: April 21, 2005Inventors: Ivan Mollov, Richard Colbeth
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Publication number: 20050083120Abstract: Data signal amplification and processing circuitry with multiple signal gains for increasing dynamic signal range. An incoming data signal is processed in accordance with multiple signal gains. The resultant signals have multiple signal values which are compared to predetermined lower and higher thresholds.Type: ApplicationFiled: October 15, 2003Publication date: April 21, 2005Inventors: Pieter Roos, Edward Seppi, Richard Colbeth, Gary Virshup, Ivan Mollov
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Publication number: 20040118991Abstract: An apparatus and method for detecting an electrostatic charge on a flat panel imager pixel array. In one embodiment, the apparatus includes an insulator layer and a flat panel pixel array coupled to a bottom surface of the insulator layer. Each pixel of the pixel array has a storage capacitance, and an electrostatic charge corresponding to a voltage applied through an electrode coupled to a top surface of the insulating layer may be detected from each storage capacitance.Type: ApplicationFiled: December 18, 2002Publication date: June 24, 2004Inventors: Richard Colbeth, George Zentai, Shuji Yamaoka
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Patent number: 6486808Abstract: A preamplifier stage with dynamically controllable signal gain in a data signal processing circuit that includes a downstream analog-to-digital signal converter. The level of the data signal subsequent to its preamplification is monitored and the gain of the preamplifier stage is dynamically adjusted in response to such data signal transcending one or more predetermined thresholds. Hence, the effective dynamic range of the preamplifier stage is extended, thereby also effectively extending the dynamic range of the overall system beyond that to which it would have otherwise been limited by the dynamic range of the analog-to-digital signal converter. In accordance with a preferred embodiment of the invention, such a preamplifier is used in an X-ray imaging system such as that using flat panel solid state imaging devices.Type: GrantFiled: October 16, 2001Date of Patent: November 26, 2002Assignee: Varian Medical SystemsInventors: Edward Seppi, Edward Shapiro, George Zentai, Richard Colbeth