Patents by Inventor Ronald E. Malmin

Ronald E. Malmin 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).

  • Publication number: 20210282725
    Abstract: To capture more emitted photons with a Compton camera, the scatter detector is tilted (non-orthogonal angle) relative to a radial from the isocenter of the imaging system. The tilt creates a greater volume for scatter interaction. To capture more scatter photons, the catcher detector is non-planar, such as a multi-faced detector at least partially surrounding a volume behind the scatter detector. The tilted scatter detector alone, the non-planar catcher detector alone, or the tilted scatter detector and the non-planar catcher detector are used in the Compton camera.
    Type: Application
    Filed: August 7, 2018
    Publication date: September 16, 2021
    Inventors: Miesher Rodrigues, Ronald E. Malmin
  • Publication number: 20210103158
    Abstract: A framework for characterization of a collimator. In accordance with one aspect, first and second sides of the collimator are photographed to generate first and second image data. An optical characterization map (OCM) may be generated based on the first and second image data, wherein the optical characterization map characterizes the individual channels of the collimator. Quality assessment or image reconstruction may then be performed based on the OCM.
    Type: Application
    Filed: October 2, 2019
    Publication date: April 8, 2021
    Inventors: Alexander Hans Vija, Francesc dAssis Massanes Basi, Amos Yahill, Ronald E. Malmin
  • Patent number: 10964008
    Abstract: A system and method includes acquisition of a plurality of images depicting a respective scintillator crystal, determination of a plurality of categories based on the plurality of images, determination of a crystal quality value associated with each of the plurality of categories, training of a network to receive an input image and output an indication of one of the plurality of categories based on the input image, the training based on the plurality of images and the at least one category associated with each pf the plurality of images, operation of the trained network to receive a first image of a first scintillator crystal and output a first one of the plurality of categories based on the first image, and determination of a quality of the first scintillator crystal based on the first one of the plurality of categories and a first crystal quality value associated with the first one of the plurality of categories.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: March 30, 2021
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: Xinhong Ding, Ronald E. Malmin
  • Patent number: 10866329
    Abstract: A system includes reception of an a electrical signal from a light sensor, determination of a first integral over a first number of samples of the electrical signal, determination of an estimated energy of a first pulse based on the first integral, where the electrical signal includes the first pulse and a second pulse, where a portion of the second pulse overlaps a portion of the first pulse, determination of a second integral over a second number of samples of the electrical signal, determination of a second estimated energy of the first pulse over the second number of samples, determination of a residual short integral based on the second integral and the second estimated energy, and determination of an estimated energy of the second pulse based on the residual short integral.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: December 15, 2020
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Ronald E. Malmin
  • Patent number: 10353081
    Abstract: For count loss correction, the capability of the discriminator, measured periodically, to detect an event is identified. Rather than inserting an actual event or a signal emulating an actual event for discrimination, the capability to discriminate is tested by a virtual injection. The count loss may be directly measured without causing extra actual discrimination by the discriminator. Direct measurement with virtual testing may avoid loss of accuracy due to time and use-case variation.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: July 16, 2019
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: James Frank Caruba, Ronald E. Malmin
  • Publication number: 20190180436
    Abstract: A system and method includes acquisition of a plurality of images depicting a respective scintillator crystal, determination of a plurality of categories based on the plurality of images, determination of a crystal quality value associated with each of the plurality of categories, training of a network to receive an input image and output an indication of one of the plurality of categories based on the input image, the training based on the plurality of images and the at least one category associated with each pf the plurality of images, operation of the trained network to receive a first image of a first scintillator crystal and output a first one of the plurality of categories based on the first image, and determination of a quality of the first scintillator crystal based on the first one of the plurality of categories and a first crystal quality value associated with the first one of the plurality of categories.
    Type: Application
    Filed: December 4, 2018
    Publication date: June 13, 2019
    Inventors: Xinhong Ding, Ronald E. Malmin
  • Publication number: 20190170882
    Abstract: A system includes a scintillator to receive radiation and to generate a plurality of light photons in response to reception of the radiation, a light sensor to receive light photons and to generate an electrical signal in response to reception of the light photon, and a processing unit.
    Type: Application
    Filed: June 2, 2017
    Publication date: June 6, 2019
    Inventor: Ronald E. Malmin
  • Publication number: 20180113222
    Abstract: For count loss correction, the capability of the discriminator, measured periodically, to detect an event is identified. Rather than inserting an actual event or a signal emulating an actual event for discrimination, the capability to discriminate is tested by a virtual injection. The count loss may be directly measured without causing extra actual discrimination by the discriminator. Direct measurement with virtual testing may avoid loss of accuracy due to time and use-case variation.
    Type: Application
    Filed: April 20, 2016
    Publication date: April 26, 2018
    Inventors: James Frank Caruba, Ronald E. Malmin
  • Patent number: 9633423
    Abstract: Disclosed herein is a method for removing septal shadows from thick septa collimator images, comprising disposing a line radiation source in a first orientation with respect to an imaging detector; disposing a thick septa collimator between the line radiation source and the imaging detector; where the collimator and the detector move in unison with one another; obtaining a plurality of a line images, where each line image is taken at a different location of the line radiation source with respect to the thick septa collimator; wherein each different location of the line radiation source is along a first linear direction; and relocating the plurality of the line images so obtained to a common location; and summing the images to reduce the septal shadow effects.
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: April 25, 2017
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Ronald E. Malmin
  • Patent number: 9330801
    Abstract: A photon collimator, suitable for use in medical imaging equipment, is constructed from a block of photon-attenuating material, such as solid tungsten or molybdenum alloy that defines a plurality of integrally formed septa slats. Each slat has an elongated length dimension greater than thickness and depth dimensions, and is oriented in an opposed pattern array that is laterally spaced relative to its respective thickness dimension. An aperture channel is defined between each pair of opposed slats. Rows of integrally formed slats in one block or separately affixed blocks may be stacked on each other at skewed angles to form two-dimensional grids of apertures having polygonal cross sections. The slats may be formed by electric discharge or laser thermal ablation machining, such as by a sequential passing of an EDM wire cutting head along the pattern array, repeating sequential cutting of respective channel depth and width.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: May 3, 2016
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Ronald E. Malmin
  • Publication number: 20150363923
    Abstract: Disclosed herein is a method for removing septal shadows from thick septa collimator images, comprising disposing a line radiation source in a first orientation with respect to an imaging detector; disposing a thick septa collimator between the line radiation source and the imaging detector; where the collimator and the detector move in unison with one another; obtaining a plurality of a line images, where each line image is taken at a different location of the line radiation source with respect to the thick septa collimator; wherein each different location of the line radiation source is along a first linear direction; and relocating the plurality of the line images so obtained to a common location; and summing the images to reduce the septal shadow effects.
    Type: Application
    Filed: June 10, 2015
    Publication date: December 17, 2015
    Inventor: Ronald E. Malmin
  • Publication number: 20150076375
    Abstract: A photon collimator, suitable for use in medical imaging equipment, is constructed from a block of photon-attenuating material, such as solid tungsten or molybdenum alloy that defines a plurality of integrally formed septa slats. Each slat has an elongated length dimension greater than thickness and depth dimensions, and is oriented in an opposed pattern array that is laterally spaced relative to its respective thickness dimension. An aperture channel is defined between each pair of opposed slats. Rows of integrally formed slats in one block or separately affixed blocks may be stacked on each other at skewed angles to form two-dimensional grids of apertures having polygonal cross sections. The slats may be formed by electric discharge or laser thermal ablation machining, such as by a sequential passing of an EDM wire cutting head along the pattern array, repeating sequential cutting of respective channel depth and width.
    Type: Application
    Filed: November 19, 2014
    Publication date: March 19, 2015
    Inventor: Ronald E. Malmin
  • Patent number: 8957397
    Abstract: A photon collimator, suitable for use in medical imaging equipment, is constructed from a block of photon-attenuating material, such as solid tungsten or molybdenum alloy that defines a plurality of integrally formed septa slats. Each slat has an elongated length dimension greater than thickness and depth dimensions, and is oriented in an opposed pattern array that is laterally spaced relative to its respective thickness dimension. An aperture channel is defined between each pair of opposed slats. Rows of integrally formed slats in one block or separately affixed blocks may be stacked on each other at skewed angles to form two-dimensional grids of apertures having polygonal cross sections. The slats may be formed by electric discharge or laser thermal ablation machining, such as by a sequential passing of an EDM wire cutting head along the pattern array, repeating sequential cutting of respective channel depth and width.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: February 17, 2015
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Ronald E. Malmin
  • Patent number: 8483460
    Abstract: A method for performing reconstruction of single photon emission computed tomographic images wherein forward and/or backward projection steps in the reconstruction utilize measured collimator hole orientation angles, whereby the reconstructed tomographic images have improved image resolution and reduced distortion and artifact content.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: July 9, 2013
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Ronald E. Malmin
  • Patent number: 8466925
    Abstract: In an imaging system employing a multifocal collimator, displaying an image. Framing an event stream into a first buffer. Mapping each first buffer bin to a bin of each of a normalization buffer and a count buffer. Normalization buffer and count buffer are the same dimension. First buffer bins correspond to normalization buffer bins and the count buffer bins such that geometric distortion from the multifocal collimator is substantially reduced. The value of each normalization buffer bin corresponds to the quantity of corresponding first buffer bins corresponding to that normalization buffer bin, and a value of each count buffer bin corresponds to total counts of the one or more of the first buffer bins corresponding to the each count buffer bin. Determining an updated image as the ratio of the values of count buffer bins to the normalization buffer bins. Displaying an image as a function of the updated image.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: June 18, 2013
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Ronald E. Malmin
  • Publication number: 20130075630
    Abstract: A photon collimator, suitable for use in medical imaging equipment, is constructed from a block of photon-attenuating material, such as solid tungsten or molybdenum alloy that defines a plurality of integrally formed septa slats. Each slat has an elongated length dimension greater than thickness and depth dimensions, and is oriented in an opposed pattern array that is laterally spaced relative to its respective thickness dimension. An aperture channel is defined between each pair of opposed slats. Rows of integrally formed slats in one block or separately affixed blocks may be stacked on each other at skewed angles to form two-dimensional grids of apertures having polygonal cross sections. The slats may be formed by electric discharge or laser thermal ablation machining, such as by a sequential passing of an EDM wire cutting head along the pattern array, repeating sequential cutting of respective channel depth and width.
    Type: Application
    Filed: August 16, 2012
    Publication date: March 28, 2013
    Applicant: SIEMENS MEDICAL SOLUTIONS USA, INC.
    Inventor: Ronald E. Malmin
  • Patent number: 8340386
    Abstract: A method for measuring a SPECT collimator's hole orientation angles includes (a) providing a plurality of parallel spaced apart line radiation sources at a distance from a detector; (b) positioning a first collimator between the plurality of spaced apart line radiation sources and the detector; (c) obtaining a set of line images of the plurality of line radiation sources by scanning/stepping the plurality of line radiation sources across the first collimator in a first direction; (d) obtaining a second set of line images of the plurality of line radiation sources by scanning/stepping the plurality of line radiation sources across the first collimator in a second direction thai is perpendicular to the first direction; (c) repeating the steps (c) and (d) for a second collimator, wherein one of the two collimators is a reference collimator and the other of the two collimators is a collimator being measured.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: December 25, 2012
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Ronald E. Malmin
  • Patent number: 8315428
    Abstract: A method for measuring a SPECT collimator's hole orientation angles includes obtaining a set of stepped radiation line images of a line radiation source by scanning/stepping the line radiation source across a first collimator in a first direction; obtaining a second set of stepped radiation line images of the line radiation source across the first collimator in a second direction that is perpendicular to the first direction; and obtaining two sets of stepped radiation line images for a second collimator, wherein one of the two collimators is a reference collimator and the other is a collimator being measured. Calculating the collimator hole orientation angles requires determining offset distances along the two directions for each pair of lines between the reference collimator's line images and the measured collimator's line images by identifying and pairing the lines from the reference collimator line images and the measured collimator line images.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: November 20, 2012
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: Xinhong Ding, Ronald E. Malmin
  • Publication number: 20120177268
    Abstract: A method for measuring a SPECT collimator's hole orientation angles includes (a) providing a plurality of parallel spaced apart line radiation sources at a distance from a detector; (b) positioning a first collimator between the plurality of spaced apart line radiation sources and the detector; (c) obtaining a set of line images of the plurality of line radiation sources by scanning/stepping the plurality of line radiation sources across the first collimator in a first direction; (d) obtaining a second set of line images of the plurality of line radiation sources by scanning/stepping the plurality of line radiation sources across the first collimator in a second direction that is perpendicular to the first direction; (e) repeating the steps (c) and (d) for a second collimator, wherein one of the two collimators is a reference collimator and the other of the two collimators is a collimator being measured, whereby the line images obtained using the reference collimator are reference collimator line images and t
    Type: Application
    Filed: January 10, 2011
    Publication date: July 12, 2012
    Applicant: SIEMENS MEDICAL SOLUTIONS USA, INC.
    Inventor: Ronald E. Malmin
  • Patent number: 8143569
    Abstract: A method of tuning an imaging system can include the steps of receiving photons at photo-multiplier units that are part of an array, determining an energy level for each of the photo-multiplier units based on events over a specific photo-multiplier unit and determining a sum energy level for the array of photo-multiplier units based on the events over the specific photo-multiplier unit. The method can also include the step of comparing the energy level for each of the photo-multiplier units with the sum energy level for the array of photo-multiplier units to assist in determining a contribution matrix for the array of photo-multiplier units. The energy level determination steps and the comparison step can be repeated for each photo-multiplier unit in the array to determine the contribution matrix.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: March 27, 2012
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Ronald E. Malmin