Patents by Inventor David S. Vickers
David S. Vickers 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: 7638760Abstract: A method and apparatus for correcting the output of sensors of a radiation detector by tracking a baseline value detected by the detector during quiescent operation, calculating an average to reduce noise, and storing the average as an offset value for correcting forthcoming data to eliminate the offset.Type: GrantFiled: May 27, 2005Date of Patent: December 29, 2009Assignee: GVI Technology Partners, Ltd.Inventors: Christopher H. Heipp, David S. Vickers
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Patent number: 7612343Abstract: A device and method for acquiring Single Photon Emission Computed Tomography (SPECT) data. In particular, a method of acquiring data using a gamma camera detector with a collimator, such as a slotted, inverse fan beam collimator, for example. An example collimator that can be used for the method is one comprising: a slot substantially parallel to the axis of rotation of a SPECT scanner; a plurality of plates, each one of the plates being substantially perpendicular to the slot and also being substantially parallel to a transaxial direction of the SPECT scanner; and a detector associated with the slot and the plurality of plates such that, through any motion of the scanner, the slot, the plates and the detector retain their relative positional relationship.Type: GrantFiled: October 15, 2007Date of Patent: November 3, 2009Assignee: GVI Medical DevicesInventor: David S Vickers
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Publication number: 20080087828Abstract: A device and method for acquiring Single Photon Emission Computed Tomography (SPECT) data. In particular, a method of acquiring data using a gamma camera detector with a collimator, such as a slotted, inverse fan beam collimator, for example. An example collimator that can be used for the method is one comprising: a slot substantially parallel to the axis of rotation of a SPECT scanner; a plurality of plates, each one of the plates being substantially perpendicular to the slot and also being substantially parallel to a transaxial direction of the SPECT scanner; and a detector associated with the slot and the plurality of plates such that, through any motion of the scanner, the slot, the plates and the detector retain their relative positional relationship.Type: ApplicationFiled: October 15, 2007Publication date: April 17, 2008Applicant: GVI MEDICAL DEVICESInventor: David S. Vickers
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Patent number: 7297957Abstract: A method and apparatus for calibrating the sensors of a radiation detector by collecting a radiation spectrum detected by the detector during an irradiation, calculating a peak energy location from the collected radiation spectrum, determining if the peak energy location is mislocated from a desired location; and adjusting the gain setting for the selected radiation sensor so that the peak energy location is no longer mislocated from the desired location.Type: GrantFiled: April 8, 2005Date of Patent: November 20, 2007Assignee: GVI Technology Partners, Ltd.Inventors: David S. Vickers, William G. Greathouse
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Publication number: 20030128801Abstract: A multi-modality imaging system that can be utilized in the volume computed tomography (VCT) mode, the single photon emission computed tomography (SPECT) mode and the positron emission tomography (PET) mode is disclosed. In the VCT mode of operation, three (3) x-ray sources and associated detectors can be utilized. In the SPECT and PET modes of operation, the gamma radiation is provided by an isotope ingested by the patient and is detected by the detectors angularly spaced around the patient. A fused imaging analysis and computer aided diagnosis system is provided and processes the images produced by the multi-modality imaging system. The fused images are analyzed and the fused image data are compared with disease process models to provide feedback to the patient and medical professionals in the form of four dimensional displays and interactive image visualizations.Type: ApplicationFiled: January 7, 2002Publication date: July 10, 2003Applicant: Multi-Dimensional Imaging, Inc.Inventors: Harvey C. Eisenberg, William K. McCroskey, David P. Rohler, David S. Vickers, Frank T. Bradshaw, Donald R. Ouimette, Joseph S. Deucher
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Patent number: 6255655Abstract: A gamma camera is modified to perform PET studies as well as SPECT studies by utilization of the camera's SPECT electronics to likewise generate triggering pulse signals for photons indicative of a positron annihilation event which are corrected, on a bundled basis, for position, linearity and uniformity by the same digital processors used by the camera for SPECT studies. In addition the triggering pulse signals generate analog timing signals passed through a coarse coincidence circuit to establish matched pairs of timing signals which are digitally time stamped and processed along with the bundled set of pulse signals that the timing signals originated from.Type: GrantFiled: May 1, 2000Date of Patent: July 3, 2001Assignee: SMV America, Inc.Inventors: William K. Mc Croskey, Christ H. Heipp, David S. Vickers
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Patent number: 6072177Abstract: A gamma camera is modified to perform PET studies as well as SPECT studies by utilization of the camera's SPECT electronics to likewise generate triggering pulse signals for photons indicative of a positron annihilation event which are corrected, on a bundled basis, for position, linearity and uniformity by the same digital processors used by the camera for SPECT studies. In addition the triggering pulse signals generate analog timing signals passed through a coarse coincidence circuit to establish matched pairs of timing signals which are digitally time stamped and processed along with the bundled set of pulse signals that the timing signals originated from.Type: GrantFiled: September 14, 1998Date of Patent: June 6, 2000Assignee: SMV America, Inc.Inventors: William K. McCroskey, Christ H. Heipp, David S. Vickers
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Patent number: 5931248Abstract: An inflated roll-stabilizing keel system has a first trough-shaped bladder nd a second trough-shaped bladder attached to the underside of a forward portion of the first trough-shaped bladder. Holes pass through from the first trough-shaped bladder to the second trough-shaped bladder to allow inflation to flow therein. A plurality of shaped bladders are attached successively along and to the first trough-shaped bladder immediately aft of the second trough-shaped bladder. Each shaped bladder has a rectangular base portion attached to the underside of the first trough-shaped bladder. Each shaped bladder tapers downward from its base portion to an open apex. An inflation hole passes through from the first trough-shaped bladder to each of the shaped bladders to allow inflation air to flow therein. Once inflated, adjacent shaped bladders contact one another between the base portion and open apex in an area of contact.Type: GrantFiled: September 15, 1997Date of Patent: August 3, 1999Assignee: The United States of America as represented by the Secretary of the NavyInventors: David S. Vickers, Ray W. Dyke
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Patent number: 5841140Abstract: A gamma camera is modified to perform PET studies as well as SPECT studies by utilization of the camera's SPECT electronics to likewise generate triggering pulse signals for photons indicative of a positron annihilation event which are corrected, on a bundled basis, for position, linearity and uniformity by the same digital processors used by the camera for SPECT studies. In addition the triggering pulse signals generate analog timing signals passed through a coarse coincidence circuit to establish matched pairs of timing signals which are digitally time stamped and processed along with the bundled set of pulse signals that the timing signals originated from.Type: GrantFiled: January 8, 1997Date of Patent: November 24, 1998Assignee: SMV America, Inc.Inventors: William K. Mc Croskey, Christ H. Heipp, David S. Vickers
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Patent number: 5751000Abstract: A gamma camera is equipped with a graded filter plate in lieu of a collimator so that the gamma camera can perform PET studies. The filter plate prevents detection of Compton scattered, positron annihilation photons produced in the patient while permitting detection of photons which have experienced Compton scattering within the camera's scintillation crystal to significantly increase the camera's usable count rate. Additionally, the filter is fitted with a protruding baffle shielding the camera from stray 511 Kev radiation.Type: GrantFiled: January 8, 1997Date of Patent: May 12, 1998Assignee: SMV America, Inc.Inventors: William K. McCroskey, David S. Vickers
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Patent number: 5677536Abstract: An automatic calibration system corrects for photomultiplier drift while the gamma camera is in imaging mode. The known constant energy from the gamma rays producing scintillated light is used to effect the drift adjustment by weighting the position signals of the scintillations to determine if a valid event has occurred and building, for each photomultiplier in the camera, a statistically valid, spectral energy histogram. When the histogram counts reach a sufficient sample size the histogram data is read out in a discriminatory manner to account for noise and Compton scattering effects and used to either directly adjust the photomultiplier gain or the calibration look up tables depending on what type of system is used by the camera to process the photomultiplier signals.Type: GrantFiled: June 19, 1996Date of Patent: October 14, 1997Assignee: SMV AmericaInventor: David S. Vickers
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Patent number: 5512755Abstract: An electronic gain control for the photomultipliers of a gamma camera assures that all photomultipliers in the camera have uniform gain for any given gamma event. A specific dynode in the photomultiplier is isolated from the line resistive voltage divider string in the photomultiplier which places each dynode under incremental voltages. A voltage is then applied to the isolated dynode which can vary anywhere from the voltage the isolated dynode would have had if inserted in the voltage divider string to the voltage that the immediately preceding or immediately succeeding dynode in the string has whereby the photomultiplier's gain is controlled. The voltage applied to the isolated dynode is established for each photomultiplier in the camera by individual gain signals developed and stored during calibration of the camera for each radio active isotope whereby all photomultipliers have uniform gain for each isotope.Type: GrantFiled: May 20, 1994Date of Patent: April 30, 1996Assignee: Summit World Trade Corp.Inventors: David S. Vickers, John C. Gibbons, Geoffrey G. Cochrane
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Patent number: 5506408Abstract: A gamma camera having separate detectors respectively to determine the spatial location and energy of gamma radiation emanating from a patient is disclosed. The preferred camera has two adjacent, mutually perpendicular arrays of parallel, coordinant signal producing scintillaters positioned on the face of a scintillating energy crystal. Each of the fibers within the arrays conducts light resulting from Compton events to an associated one of a set of photodetectors to produce coordinant signals. Other photodetectors monitor the total scintillated energy within the energy crystal. The energy crystal is of sufficient size to absorb energy remaining in each patient emitted gamma ray that has produced Compton events in the coordinant scintillators. The sum of the energies of substantially coincident signals from the fibers and the crystal is used to identify photo peak events.Type: GrantFiled: March 28, 1994Date of Patent: April 9, 1996Assignee: Summit World Trade CorporationInventors: David S. Vickers, Geoffrey G. Cochrane
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Patent number: 5138642Abstract: A detector arrangement is disclosed for an industrial CT x-ray system which uses a three dimensional cone beam to irradiate the specimen and a large two dimensional scintillation screen to develop a light image corresponding to the energy of the attenuated radiation beams. The light image is focused by a special lens arrangement with zoom capability onto the photocathode of an intensifier. The intensified light image developed is transmitted by fiberoptics to a plurality of CCD chips, each chip developing electrical signals corresponding to a segment of the image developed in the intensifier. The chips are clocked in a predetermined manner based on a prior information developed in an initial scan to produce a high resolution image of large industrial objects in a short time.Type: GrantFiled: January 29, 1990Date of Patent: August 11, 1992Assignee: Innovative Imaging Systems, Inc.Inventors: William K. McCroskey, David S. Vickers, Roland W. Carlson, Robert L. Zahn, Jack A. Drobny
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Patent number: 5023895Abstract: An industrial CT system is provided for three dimensional imaginig which includes a three dimensional cone beam of hard radiation fixed with respect to a two dimensional scintillation detector array. The object is positioned on a turntable interposed between the radition source and detector array. Data from two dimensional views are stored as the object is rotated on the turntable about a fixed axis. The data is sufficient upon completion of one revolution to construct a transparent three dimensional image of the object. A positioning encoding arrangement adjusts for variations in the object's mass density to optimize scan-compute times while enhancing image resolution.Type: GrantFiled: March 2, 1989Date of Patent: June 11, 1991Assignee: Innovative Imaging Systems, Inc.Inventors: William K. McCroskey, David S. Vickers