Patent application number | Description | Published |
20120224760 | ENHANCED IMAGE DATA/DOSE REDUCTION - A method includes generating enhanced image data based on lower dose image data and a predetermined image quality threshold, wherein an image quality of the enhanced image data is substantially similar to an image quality of higher dose image data, and a system includes an image quality enhancer ( | 09-06-2012 |
20130243348 | CONTRAST TO NOISE RATIO (CNR) ENHANCER - A method includes enhancing a contrast to noise ratio (CNR) of image data, generating CNR enhanced image data, wherein the CNR enhanced image data has a substantially same image quality as the image data. A computing system ( | 09-19-2013 |
20130308745 | METHOD AND SYSTEM FOR DUAL ENERGY CT IMAGE RECONSTRUCTION - A method and system for dual energy CT image reconstruction are provided. In one aspect, a fast kVp switching x-ray source is used during an imaging scan to produce a low energy x-ray beam for L consecutive projection angles, and then to produce a high energy x-ray beam for H consecutive projection angles, wherein L is substantially less than H. Various methods are provided for estimating the resulting undersampled data in the low energy projection data set and the high energy projection data set. The missing low energy projection data may be estimated from the known high energy projection data using any one of several disclosed structural propagation embodiments. | 11-21-2013 |
20140133729 | IMAGE PROCESSING FOR SPECTRAL CT - A method includes estimating structure models for a voxel(s) of a spectral image based on a noise model, fitting structure models to a 3D neighborhood about the voxel(s), selecting one of the structure models for the voxel(s) based on the fittings and predetermined model selection criteria, and de-noising the voxel(s) based on the selected structure model, producing a set of de-noised spectral images. Another method includes generating a virtual contrast enhanced intermediate image for each energy image of a set of spectral images corresponding to different energy ranges based on de-noised spectral images, decomposed de-noised spectral images, an iodine map, and a contrast enhancement factor; and generating final virtual contrast enhanced images by incorporating a simulated partial volume effect with the intermediate virtual contrast enhanced images. Also described herein are approaches for generating a virtual non-contrasted image, a bone and calcification segmentation map, and an iodine map for multi-energy imaging studies. | 05-15-2014 |
20150112191 | FRACTIONAL FLOW RESERVE (FFR) INDEX WITH ADAPTIVE BOUNDARY CONDITION PARAMETERS - A method includes obtaining a boundary condition estimate. The boundary condition estimate includes at least an estimated outlet resistance of a vessel with a stenosis. The method further includes correcting the boundary condition estimate based on a severity of the stenosis, thereby creating a corrected boundary condition. The method further includes determining an FFR index based on the corrected boundary condition. The method further includes displaying the FFR index. A computing system includes a computer readable storage medium with instructions that iteratively determine at least an FFR index based on a severity of a stenosis of a vessel. The computing system further includes a computer processor that processes the instructions and generates the FFR index based on the severity of the stenosis of the vessel. | 04-23-2015 |
20150154766 | IMAGE NOISE REDUCTION AND/OR IMAGE RESOLUTION IMPROVEMENT - A method for improving image quality of image data includes analyzing, for each of a plurality of voxels of image data, a set of entries of a dictionary, wherein an entry represents a mapping between a lower resolution patch of voxels and a corresponding higher resolution patch of voxel or a local neighborhood around a voxel, deriving, for each of the plurality of voxels, a subspace based on the analysis, wherein the subspace is for one of the mapping or the local neighborhood, and restoring target image data based on the subspaces, wherein the target image data is image data with higher image resolution or reduced image noise. | 06-04-2015 |
20150282765 | FRACTIONAL FLOW RESERVE (FFR) INDEX - As described herein, an unknown FFR is classified based on certain extracted features. In addition, an estimation of the unknown FFR can be determined based on certain extracted features. Furthermore, a confidence interval can be determined for the estimated FFR. In another instance, boundary conditions for determining an FFR via simulation are determined. The boundary conditions can be used to classify the unknown FFR. | 10-08-2015 |
20150379694 | STRUCTURE PROPAGATION RESTORATION FOR SPECTRAL CT - A method includes obtaining at least one of projection data from a spectral scan or image data generated from the projection data, selecting a local reference dataset from the at least one of the projection data or the image data, determining a noise pattern for the selected reference dataset, estimating underlying local structure from the reference dataset based on the noise pattern, and restoring at least one of the projection data or the image data based on the estimated underlying local structure. | 12-31-2015 |