Patents by Inventor Roger E. Arseneau

Roger E. Arseneau 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: 9140806
    Abstract: Timing is determined in positron emission tomography (PET). Two or more different types of timing detection are used for each event. The difference in time from the different types of timing detection may indicate whether or not an error has occurred. An average difference or other typical offset difference may be used to correct the error. During pile up, the difference information may be used to create a missing time, such as using an average difference between second derivative and constant fraction discrimination as an offset to determine constant fraction timing from second derivative timing.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: September 22, 2015
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Roger E. Arseneau
  • Patent number: 8969816
    Abstract: A printed circuit board (PCB) assembly of a data processing unit for an integrated magnetic resonance (MR) and positron emission tomography (PET) system, the PCB assembly includes a plurality of PCB layers disposed in a stacked arrangement, first and second PET signal processing circuits carried by a first layer of the plurality of PCB layers, first and second ground plane structures carried by a second layer of the plurality of PCB layers and configured relative to the first and second PET signal processing circuits, respectively, and a ground partition that separates the first PET signal processing circuit from the second PET signal processing circuit on the first layer. The ground partition extends through the first layer to provide electromagnetic interference (EMI) shielding between the first and second PET signal processing circuits.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: March 3, 2015
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: James Frank Caruba, Patanit Sanpitak, Grant Arthur Albert, Darryl Hrdina, Roger E. Arseneau, John P. Valenta
  • Patent number: 8921796
    Abstract: A positron emission tomography (PET) system includes a PET detector configured to generate energy signals indicative of a set of events at the PET detector, a first discriminator coupled to the PET detector and configured to generate a primary timing signal in response to a primary event of the set of events, a second, derivative-based discriminator coupled to the PET detector and configured to generate a pileup timing signal in response to a piled-up event of the set of events, and a logic circuit to gate the primary and pileup timing signals of the first and second discriminators.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: December 30, 2014
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: Roger E. Arseneau, James Frank Caruba
  • Publication number: 20140197320
    Abstract: Timing is determined in positron emission tomography (PET). Two or more different types of timing detection are used for each event. The difference in time from the different types of timing detection may indicate whether or not an error has occurred. An average difference or other typical offset difference may be used to correct the error. During pile up, the difference information may be used to create a missing time, such as using an average difference between second derivative and constant fraction discrimination as an offset to determine constant fraction timing from second derivative timing.
    Type: Application
    Filed: January 15, 2013
    Publication date: July 17, 2014
    Applicant: Siemens Medical Solutions USA, Inc.
    Inventor: Roger E. Arseneau
  • Patent number: 8754376
    Abstract: A representative method for determining a zero baseline value of a channel from a detector device of a nuclear medicine imagining system to allow for correction caused by noise or interference on the detector device includes calculating a first value of a baseline based on a first sample of analog electrical signals from analog-to-digital converters (ADCs) coupled to the detector device; comparing a predetermined value with the first value of the baseline; determining whether there is a small change between the predetermined value and the first value of the baseline; and responsive to determining that the small change exists, adjusting the baseline of the ADCs by a fraction of the small change based on the comparison between the predetermined value and the first value of the baseline.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: June 17, 2014
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Roger E. Arseneau
  • Patent number: 8473253
    Abstract: Methods, computer-readable mediums, and a circuit are provided. In one embodiment, a method is provided which obtains a digital sample. The method calculates a second derivative of the digital sample and thereafter determines when the second derivative passed through a zero crossing point. A master clock value and the second derivative value before and after the second derivate passes through zero are used to calculate a clock fraction and add the clock fraction to the master clock value. Thereafter, an event start signal is triggered to initiates signal processing.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: June 25, 2013
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Roger E. Arseneau
  • Patent number: 8378306
    Abstract: PET signals are amplified in a hybrid PET/MR system. An amplifier structure is provided for operation in the magnetic field of the MR magnets. By filtering to remove signals at the MR frequency (e.g., about 123 MHz) as part of the amplification circuit, the amplification circuit may be positioned within the RF cabin, within the magnetic field, and even within a same housing as the MR magnets. MR interference may be reduced by staged amplification. The filtering may be bi-directional, such as using parallel and series traps. Digitization of the PET signals may be provided within the magnetic field with no or little interference with MR operation.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: February 19, 2013
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: James Frank Caruba, Roger E. Arseneau
  • Patent number: 8369928
    Abstract: A data processing process and embodiment for optimizing the signal path for multi-modality imaging is described. The embodiment and process optimizes the signal to noise ratio in a positron emission tomography (PET) signal path utilizing scintillation crystals, avalanche photo diodes, and charge sensitive preamplifiers in a dual modality MRI/PET scanner. The dual use of both and analog pole zero circuit and a digital filter enables higher signal levels or a fixed ADC input range and thus a higher possible signal to noise ratio in the presence of significant pileup caused by high positron activity. The higher signal to noise ratio is needed in the PET signal architecture, because of the presence of non-modal time varying electromagnetic fields from the MR, which are a significant source of noise for the wideband PET signal modality.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: February 5, 2013
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: Roger E. Arseneau, James Frank Caruba, Michael E. Casey, Mark Musrock, Nan Zhang
  • Publication number: 20120143036
    Abstract: A representative method for determining a zero baseline value of a channel from a detector device of a nuclear medicine imagining system to allow for correction caused by noise or interference on the detector device includes calculating a first value of a baseline based on a first sample of analog electrical signals from analog-to-digital converters (ADCs) coupled to the detector device; comparing a predetermined value with the first value of the baseline; determining whether there is a small change between the predetermined value and the first value of the baseline; and responsive to determining that the small change exists, adjusting the baseline of the ADCs by a fraction of the small change based on the comparison between the predetermined value and the first value of the baseline.
    Type: Application
    Filed: December 7, 2010
    Publication date: June 7, 2012
    Applicant: SIEMENS MEDICAL SOLUTIONS USA, INC.
    Inventor: Roger E. Arseneau
  • Publication number: 20120101779
    Abstract: Methods, computer-readable mediums, and a circuit are provided. In one embodiment, a method is provided which obtains a digital sample. The method calculates a second derivative of the digital sample and thereafter determines when the second derivative passed through a zero crossing point. A master clock value and the second derivative value before and after the second derivate passes through zero are used to calculate a clock fraction and add the clock fraction to the master clock value. Thereafter, an event start signal is triggered to initiates signal processing.
    Type: Application
    Filed: October 21, 2010
    Publication date: April 26, 2012
    Applicant: SIEMENS MEDICAL SOLUTIONS USA, INC.
    Inventor: Roger E. Arseneau
  • Publication number: 20120018643
    Abstract: PET signals are amplified in a hybrid PET/MR system. An amplifier structure is provided for operation in the magnetic field of the MR magnets. By filtering to remove signals at the MR frequency (e.g., about 123 MHz) as part of the amplification circuit, the amplification circuit may be positioned within the RF cabin, within the magnetic field, and even within a same housing as the MR magnets. MR interference may be reduced by staged amplification. The filtering may be bi-directional, such as using parallel and series traps. Digitization of the PET signals may be provided within the magnetic field with no or little interference with MR operation.
    Type: Application
    Filed: July 20, 2011
    Publication date: January 26, 2012
    Applicant: SIEMENS MEDICAL SOLUTIONS USA, INC.
    Inventors: James Frank Caruba, Roger E. Arseneau
  • Publication number: 20120022364
    Abstract: A printed circuit board (PCB) assembly of a data processing unit for an integrated magnetic resonance (MR) and positron emission tomography (PET) system, the PCB assembly includes a plurality of PCB layers disposed in a stacked arrangement, first and second PET signal processing circuits carried by a first layer of the plurality of PCB layers, first and second ground plane structures carried by a second layer of the plurality of PCB layers and configured relative to the first and second PET signal processing circuits, respectively, and a ground partition that separates the first PET signal processing circuit from the second PET signal processing circuit on the first layer. The ground partition extends through the first layer to provide electromagnetic interference (EMI) shielding between the first and second PET signal processing circuits.
    Type: Application
    Filed: July 20, 2011
    Publication date: January 26, 2012
    Applicant: SIEMENS MEDICAL SOLUTIONS USA, INC.
    Inventors: James Frank Caruba, Patanit Sanpitak, Grant Arthur Albert, Darryl Hrdina, Roger E. Arseneau, John P. Valenta
  • Publication number: 20100076300
    Abstract: A data processing process and embodiment for optimizing the signal path for multi-modality imaging is described. The embodiment and process optimizes the signal to noise ratio in a positron emission tomography (PET) signal path utilizing scintillation crystals, avalanche photo diodes, and charge sensitive preamplifiers in a dual modality MRI/PET scanner. The dual use of both and analog pole zero circuit and a digital filter enables higher signal levels or a fixed ADC input range and thus a higher possible signal to noise ratio in the presence of significant pileup caused by high positron activity. The higher signal to noise ratio is needed in the PET signal architecture, because of the presence of non-modal time varying electromagnetic fields from the MR, which are a significant source of noise for the wideband PET signal modality.
    Type: Application
    Filed: September 22, 2009
    Publication date: March 25, 2010
    Applicant: SIEMENS MEDICAL SOLUTIONS USA, INC.
    Inventors: Roger E. Arseneau, James Frank Caruba, Michael E. Casey, Mark Musrock, Nan Zhang
  • Patent number: 7462816
    Abstract: Method and system are provided for calibrating a nuclear medical imaging apparatus for DC shift caused by gamma event afterglow pulses. Detector responses to weak and to high count rate radiation sources are compared with each other, and a zero correction value is incremented until the detector response is the same for the weak source and the high count rate source. The zero correction value is then stored as a static zero correction value, which multiplies a dynamic zero correction value obtained just prior to the occurrence of a gamma event, in order to remove the effects of DC shifts from the output energy signal Esum.
    Type: Grant
    Filed: February 18, 2008
    Date of Patent: December 9, 2008
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Roger E. Arseneau
  • Publication number: 20080135770
    Abstract: Method and system are provided for calibrating a nuclear medical imaging apparatus for DC shift caused by gamma event afterglow pulses. Detector responses to weak and to high count rate radiation sources are compared with each other, and a zero correction value is incremented until the detector response is the same for the weak source and the high count rate source. The zero correction value is then stored as a static zero correction value, which multiplies a dynamic zero correction value obtained just prior to the occurrence of a gamma event, in order to remove the effects of DC shifts from the output energy signal Esum.
    Type: Application
    Filed: February 18, 2008
    Publication date: June 12, 2008
    Applicant: SIEMENS MEDICAL SOLUTIONS USA, INC.
    Inventor: Roger E. Arseneau
  • Patent number: 7355167
    Abstract: Method and system are provided for calibrating a nuclear medical imaging apparatus for DC shift caused by gamma event afterglow pulses. Detector responses to weak and to high count rate radiation sources are compared with each other, and a zero correction value is incremented until the detector response is the same for the weak source and the high count rate source. The zero correction value is then stored as a static zero correction value, which multiplies a dynamic zero correction value obtained just prior to the occurrence of a gamma event, in order to remove the effects of DC shifts from the output energy signal Esum.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: April 8, 2008
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Roger E. Arseneau
  • Patent number: 7323691
    Abstract: Methods and apparatus provide for determining whether X-rays produced by a computer tomography (CT) scanner have infiltrated a single photon emission computed tomography (SPECT) scanner and shutting down at least one of a power source to one or more photo-multiplier tubes (PMTs) of the SPECT scanner, and an X-ray source of the CT scanner, when the determination is affirmative.
    Type: Grant
    Filed: September 12, 2006
    Date of Patent: January 29, 2008
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: James Frank Caruba, Roger E. Arseneau
  • Patent number: 7247862
    Abstract: The afterglow and count rate/dead time of a nuclear imaging detector are calculated for use in correcting event detection and energy integration circuits. Energy value signals and event triggering signals are respectively integrated as a function of the decay setting of the detector, until they reach stable values, which are respectively used as afterglow and count rate/dead time signals used by a data processor of the detector.
    Type: Grant
    Filed: June 24, 2005
    Date of Patent: July 24, 2007
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Roger E. Arseneau
  • Patent number: 7211800
    Abstract: Method and system are provided for calibrating a nuclear medical imaging apparatus for DC shift caused by gamma event afterglow pulses. Detector responses to weak and to high count rate radiation sources are compared with each other, and a zero correction value is incremented until the detector response is the same for the weak source and the high count rate source. The zero correction value is then stored as a static zero correction value, which multiplies a dynamic zero correction value obtained just prior to the occurrence of a gamma event, in order to remove the effects of DC shifts from the output energy signal Esum.
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: May 1, 2007
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Roger E. Arseneau
  • Patent number: 7115880
    Abstract: Digital detection of the occurrence of nuclear medicine radiation interaction events in a detector utilizes a digital energy signal sample to trigger signal processing of event signals from the detector by performing mathematical operations on the energy signal sample to determine the existence of a set of predetermined conditions that indicate the beginning of an interaction event in the detector.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: October 3, 2006
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Roger E. Arseneau