Patents by Inventor Juan M. Santos

Juan M. Santos 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).

  • K-T sparse: high frame-rate dynamic magnetic resonance imaging exploiting spatio-temporal sparsity
    Patent number: 7602183
    Abstract: A method of dynamic resonance imaging is provided. A magnetic resonance imaging excitation is applied. Data in 2 or 3 spatial frequency dimensions, and time is acquired, where an acquisition order in at least one spatial frequency dimension and the time dimension are in a pseudo-random order. The pseudo-random order and enforced sparsity constraints are used to reconstruct a time series of dynamic magnetic resonance images.
    Type: Grant
    Filed: February 12, 2008
    Date of Patent: October 13, 2009
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Michael Lustig, Juan M. Santos, David L Donoho, John M. Pauly
  • Real-time magnetic resonance imaging and peripheral arterial tone in sleep apnea diagnosis
    Publication number: 20090216108
    Abstract: Obstructive sleep apnea diagnosis based on peripheral arterial tone (PAT) and real-time magnetic resonance imaging (MRI) is provided. PAT and other physiological data are used to identify respiratory events experienced by a subject with obstructive sleep apnea. MRI images are recorded at least during the respiratory events to identify airway obstructions responsible for the sleep apnea events. The MRI images are recorded in real-time at a high frame rate during the sleep apnea events. The PAT signals and MRI images are collected while the subject is in a sleep state. PAT signals can also be used to identify sleep apnea events and trigger an MRI device to begin recording, thereby reducing the costs associated with recording extraneous and large amounts of MRI data.
    Type: Application
    Filed: January 30, 2009
    Publication date: August 27, 2009
    Inventors: Jose E. Barrera, Andrew B. Holbrook, Juan M. Santos, Gerald R. Popelka
  • K-T SPARSE: HIGH FRAME-RATE DYNAMIC MAGNETIC RESONANCE IMAGING EXPLOITING SPATIO-TEMPORAL SPARSITY
    Publication number: 20080197842
    Abstract: A method of dynamic resonance imaging is provided. A magnetic resonance imaging excitation is applied. Data in 2 or 3 spatial frequency dimensions, and time is acquired, where an acquisition order in at least one spatial frequency dimension and the time dimension are in a pseudo-random order. The pseudo-random order and enforced sparsity constraints are used to reconstruct a time series of dynamic magnetic resonance images.
    Type: Application
    Filed: February 12, 2008
    Publication date: August 21, 2008
    Applicant: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Michael Lustig, Juan M. Santos, David L. Donoho, John M. Pauly
  • RF pulses with built-in saturation sidebands for MRI applications
    Patent number: 6965234
    Abstract: A RF Excitation pulse for MRI applications has built-in saturation sidebands, thereby reducing the time for an excitation sequence. The pulse is created using the Shinnar-Le Roux (SLR) transform and designing beta-polynomials for a desired image slice excitation and for saturation of RF excitation such as by de-phasing in regions adjacent to the desired image slice. The beta-polynomials are combined and an inverse SLR transform creates the RF pulse from the combined beta-polynomial.
    Type: Grant
    Filed: October 6, 2004
    Date of Patent: November 15, 2005
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Charles H. Cunningham, Juan M. Santos, John M. Pauly, Graham Arnold Wright, Jeffrey Alan Stainsby, John Andrew Derbyshire