Patent application number | Description | Published |
20100160765 | THERAPEUTIC SUCCESS PREDICTION FOR ATRIAL FIBRILLATION - Certain embodiments of the invention provide methods of assessing a patient's risk for atrial fibrillation (AF) recurrence after receiving treatment with an AF treatment modality, that include determining, from left atrium (LA) tissue image data of a patient, a level of a parameter that is positively proportional to an amount of unhealthy tissue in a wall of the LA of the patient; and outputting, to an output device, an indicator of a comparison between (i) the determined level and (ii) a first threshold level of the parameter, the first threshold level derived from LA tissue image data of at least one other patient, who experienced an AF recurrence after treatment with the AF treatment modality. In certain embodiments, levels of the parameter equal to or greater than the first threshold level are indicative of a significant risk of AF recurrence after treatment with the AF treatment modality. | 06-24-2010 |
20100160768 | THERAPEUTIC OUTCOME ASSESSMENT FOR ATRIAL FIBRILLATION - Certain embodiments provide a method of assessing an outcome of an ablative atrial fibrillation (AF) treatment modality administered to a patient, the method including: determining, from left atrium (LA) tissue image data of a subject patient that has undergone an ablative AF treatment with the modality, at least one of: a level of a parameter that is positively proportional or negatively proportional to an amount of ablated tissue in a wall of the LA of the subject patient; and a spatial distribution, in the LA wall, of a variable indicative of ablated LA tissue; and outputting, to an output device, a machine-readable indicator of at least one of: (i) a comparison between the determined level and a threshold level of the parameter; and (ii) a map of the spatial distribution. | 06-24-2010 |
Patent application number | Description | Published |
20090087057 | METHOD AND SYSTEM FOR MOTION CORRECTION IN IMAGING SYSTEMS - A method, a system, and a computer-readable medium are provided which perform motion correction of image data. A first set of data and a second set of data of k-space data of an object to be imaged are received. The first set of data and the second set of data include a plurality of phase encoded lines that encompass the object to be imaged. The first set of data correlates with the second set of data. A cross-correlation is calculated by multiplying the first set of data and the second set of data in k-space. A value of the motion of the object to be imaged that occurred between acquisition of the first set of data and acquisition of the second set of data is calculated using the cross-correlation. The second set of data is corrected using the calculated value to remove the motion. The correction process is repeated until the k-space data is completely processed. | 04-02-2009 |
20110084693 | SYSTEMS AND METHODS FOR IMAGE RECONSTRUCTION OF SENSITIVITY ENCODED MRI DATA - Methods and systems in a parallel magnetic resonance imaging (MRI) system utilize sensitivity-encoded MRI data acquired from multiple receiver coils together with spatially dependent receiver coil sensitivities to generate MRI images. The acquired MRI data forms a reduced MRI data set that is undersampled in at least a phase-encoding direction in a frequency domain. The acquired MRI data and auto-calibration signal data are used to determine reconstruction coefficients for each receiver coil using a weighted or a robust least squares method. The reconstruction coefficients vary spatially with respect to at least the spatial coordinate that is orthogonal to the undersampled, phase-encoding direction(s) (e.g., a frequency encoding direction). Values for unacquired MRI data are determined by linearly combining the reconstruction coefficients with the acquired MRI data within neighborhoods in the frequency domain that depend on imaging geometry, coil sensitivity characteristics, and the undersampling factor of the acquired MRI data. An MRI image is determined from the reconstructed unacquired data and the acquired MRI data. | 04-14-2011 |
20130158384 | Systems and Methods for Magnetic Resonance Imaging - Methods and apparatus for operating an MRI system is provided. The disclosure provides a diffusion-prepared driven-equilibrium preparation for an imaging volume and acquiring 3-dimensional k-space data from said prepared volume by a plurality of echoplanar readouts of stimulated echoes. An excitation radio-frequency signal and first and second inversion RF signals are provided to define a field-of-view (FOV). | 06-20-2013 |
20140275972 | HIGH TEMPORAL RESOLUTION MONITORING OF CONTACT BETWEEN CATHETER TIP AND TARGET TISSUE DURING A REAL-TIME-MRI-GUIDED ABLATION - A method of monitoring a position of a catheter tip relative to a target tissue. The method includes steps of identifying a wall structure in the target tissue; guiding a catheter towards the wall structure; monitoring a location of the catheter; directing a navigator beam towards the wall structure; aligning the navigator beam with the location of the catheter; monitoring a position of the wall structure using the navigator beam; and determining the position of the wall structure relative to the location of the catheter. | 09-18-2014 |
20140378822 | EVALUATION OF CARDIAC STRUCTURE - A method of optimizing scan parameters for LGE-MRI. At least one cardiac MRI TI scout scan is performed by applying an inversion pulse every predetermined heart beat of a patient. An initial value of an inversion time TI | 12-25-2014 |