Patent application number | Description | Published |
20080212850 | EYELID DETECTION APPARATUS AND PROGRAMS THEREFOR - An eyelid detection apparatus includes a face image storing means storing a plurality of face images of a subject captured at different timings, a change detecting means detecting changes in each face image caused by blinking after processing the plurality of face images stored by the face image storing means, and an eyelid detecting means detecting a position of an eyelid of the subject based on the changes detected by the change detecting means. | 09-04-2008 |
20100014759 | EYE DETECTING DEVICE, EYE DETECTING METHOD, AND PROGRAM - An eye part detecting device has an image input section ( | 01-21-2010 |
20100183218 | OBJECT DETERMINING DEVICE AND PROGRAM THEREOF - An object determining device includes imaging means for obtaining an image of the object, likelihood value calculating means for calculating a first likelihood value for the object shown in the image by use of the image obtained by the imaging means and a machine learning system and for calculating a second likelihood value for the object shown in the image by use of the image obtained by the imaging means and another machine learning system, the first likelihood value indicating a level of likelihood that the object is wearing the covering and the second likelihood value indicating a level of likelihood that the object is not wearing the covering, and determining means for determining whether or not the object, shown in the image obtained by the imaging means, is wearing a covering, on the basis of a ratio between the first likelihood value and the second likelihood value. | 07-22-2010 |
Patent application number | Description | Published |
20090116721 | METHOD AND SYSTEM FOR MULTI-DETECTOR-ROW COMPUTED TOMOGRAPHY UTILIZING PROJECTION DATA UP-SAMPLING WITH SHIFT - A computed tomography apparatus and method where data is upsampled with shifting to produce upsampled data. The data is shifted up and down in the same amount in the z-direction, and then upsampled through interpolation. An image is reconstructed using the upsampled data. The process is preferably performed column-by-column. An upsampling shift and interpolation kernel size can be adaptive to the data z-gradient. | 05-07-2009 |
20090154639 | SYSTEM AND METHOD FOR IMAGE RECONSTRUCTION FOR HELICAL CONE BEAM COMPUTED TOMOGRAPHY WITH FACTORIZED REDUNDANCY WEIGHTING - A method and system for computed tomography were weighted data is used to reconstruct an image. The apparatus includes an x-ray source producing a cone-beam of x-rays, an x-ray detector disposed to receive x-rays from the x-ray source, a data collection unit, and a processing unit for processing the data using a weighting function using contributions from fan-beam and cone-beam weighting functions. The apparatus can produce images with reduced artifacts. | 06-18-2009 |
20090213985 | SYSTEM AND METHOD FOR TOMOGRAPHIC RECONSTRUCTION UTILIZING CIRCULAR TRAJECTORY AND SCANOGRAM TO REDUCE ARTIFACTS - A computed tomography apparatus and method using line data estimated from circle data and scanogram data. An image of a subject is reconstructed using the circle data and the estimated line data. The circle data and scanogram data may be weighted in estimating the line data. The apparatus and method are useful in diminishing or eliminating streak artifacts in reconstructed images such as images including the spine. | 08-27-2009 |
20110293155 | AUTOMATIC MOTION MAP GENERATION IN HELICAL CT - As an illustration of generating a motion map, although the cardiac CT is described for selecting an optimal phase, the disclosure is not limited to the cardiac CT. For the cardiac CT, the cardiac phase map is efficiently generated based upon helical scan data, and the optimal phase is selected within a reasonable time. At the same time, the optimal phase is accurately determined based upon complementary rays as indexes for minimal movement so as to select the projection data for minimizing artifacts in reconstructed cardiac images. The helically scanned data reflect motion within the same cardiac cycle or over the continuous cardiac cycles. The application of the complementary ray technique to the helically scanned data is accomplished by three-dimensionally determining a pair of the complementary rays in order to take into account motion within the same cardiac cycle or over the continuous cardiac cycles. The absolute sum of the differences for the top ray and or the bottom ray is determined in order to determine the amount of cardiac motion. | 12-01-2011 |
20110317805 | SYSTEM AND METHOD FOR TOMOGRAPHIC RECONSTRUCTION UTILIZING CIRCULAR TRAJECTORY AND SCANOGRAM TO REDUCE ARTIFACTS - A computed tomography apparatus and method using line data estimated from circle data and scanogram data. An image of a subject is reconstructed using the circle data and the estimated line data. The circle data and scanogram data may be weighted in estimating the line data. The apparatus and method are useful in diminishing or eliminating streak artifacts in reconstructed images such as images including the spine. | 12-29-2011 |
20120093281 | MOTION WEIGHTING IN COMPUTED TOMOGRAPHY (CT) WITH CONE ANGLE - Embodiments and processes of computer tomography perform tasks associated with weighting projection data based upon at least one motion index such as electrocardiogram gated reconstruction, view-based motion map and ray-based motion map. Other embodiments and processes of computer tomography perform tasks associated with weighting projection data based upon at least one motion index and another index that is associated with certain geometric characteristics of a cone beam. | 04-19-2012 |
20130101192 | METHOD AND SYSTEM FOR SUBSTANTIALLY REDUCING ARTIFACTS IN CIRCULAR CONE BEAM COMPUTER TOMOGRAPHY (CT) - Cone beam artifacts arise in circular CT reconstruction. The cone beam artifacts are substantially removed by reconstructing a reference image from measured data at circular source trajectory, generating synthetic data by forward projection of the reference image along a pre-determined source trajectory, which supplements the circular source trajectory to a theoretically complete trajectory, reconstructing a correction image from the synthetic data and substantially reducing the cone beam artifacts by generating a corrected image using the reference image and the correction image. | 04-25-2013 |
Patent application number | Description | Published |
20140233695 | X-RAY CT SYSTEM AND MEDICAL IMAGE PROCESSING METHOD - X-ray CT system and method of processing medical images are provided that enable combining of images with reduced effect of the differences in coordinates of the pixels in the overlapped areas of a plurality of constituent images. The X-ray CT system comprises a processor and a synthesizer. Based on coordinates of a first pixel in a first image that the image generator has generated about a first three-dimensional region of the subject and coordinates of a second pixel in a second image generated about a second three-dimensional region of the subject, the processor combines the first pixel with the second pixel on a one-for-one basis within a predetermined range in the rostrocaudal direction. The synthesizer generates a third pixel relative to the first pixel and the second pixel constituting the combination by the processor and to generate a third image that includes the third pixel. | 08-21-2014 |
20150030118 | X-RAY CT APPARATUS - X-ray CT apparatus is provided which can easily decide on a reconstruction method based on imaging conditions. X-ray CT apparatus comprises: irradiation unit irradiating a subject with X-rays, detector configured to detect X-rays transmitted through the subject, and rotator rotating irradiation unit and detector around the subject, and for generating an image by receiving biological signals of the subject to perform synchronous imaging. The memory stores a threshold value. The calculator calculates, based on imaging conditions related to the synchronous imaging, detection data amount in which detection data amount detected by the detector is represented by a number of rotations of the rotator. The decision unit decides, based on detection data amount calculated by the calculator and the threshold value stored in the memory, on reconstruction process for implementing on the detection data. The processor implements reconstruction processes decided on the detection data, to generate the image. | 01-29-2015 |
20150063529 | X-RAY COMPUTED TOMOGRAPHY IMAGING APPARATUS AND PHOTON COUNTING CT APPARATUS - Based on a plurality of detection data sets acquired by a data acquisition unit and correspond to respective tube voltages, an image generator generates a plurality of reference substance image data sets targeting respective reference substances contained in a subject. The image generator generates a correction data set for each of the plurality of tube voltages by applying, to a detection data set corresponding to each of the tube voltages, a correction coefficient for suppressing a discrepancy of an actual energy spectrum of the X-rays detected by an X-ray detector from a predetermined X-ray energy spectrum, and generates the plurality of reference substance image data sets based on a plurality of correction data sets corresponding to the respective tube voltages. | 03-05-2015 |