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| Number | Title | Issue Date |
| 6917663 | Cone-beam reconstruction apparatus and computed tomography apparatus A method for obtaining data from CT scans, including obtaining projection data from at least one detector row in a CT system; applying a weighting function including cone-angle dependent weight to projection data; filtering weighted data; and backprojecting weighted... | 07/12/2005 |
| 6915005 | Method for reconstruction of limited data images using fusion-aligned reprojection and normal-error-aligned reprojection The present invention provides methods of using current but incomplete data to prepare an approximated complete image of a patient potentially undergoing radiation therapy. A complete image of the patient is fused or aligned with a limited patient image using image ... | 07/05/2005 |
| 6912265 | Method for intraoperative generation of an updated volume data set To intraoperatively generate an updated volume data set in which a image information of biological tissue is volume data set representing reconstructed from a series of n 2D biological tissue x-ray projections, one version, in intraoperatively acquired m 2D biologic... | 06/28/2005 |
| 6907104 | Computer-controlled X-ray imaging device The invention relates to an X-ray examination device which is designed to automatically process one or a series of X-ray examinations. The automatic processing in this device relates to all phases of the examination and includes the setting of the power of the X-ray... | 06/14/2005 |
| 6907102 | Iterative reconstruction methods for multi-slice computed tomography A multi-slice computed tomography imaging system is provided including a source that generates an x-ray beam and a detector array that receives the x-ray beam and generates projection data. A translatable table has an object thereon and is operable to translate in r... | 06/14/2005 |
| 6907099 | Method and apparatus for computed tomography imaging A computed tomography (CT) imaging apparatus (40) includes a CT imaging scanner (42) that acquires projection data. Data acquisition electronics (90) communicate with the CT scanner (42), and an acquisition computer (601... | 06/14/2005 |
| 6907100 | Cone beam type of X-ray CT system for three-dimensional reconstruction An X-ray CT system is equipped with a gantry, couch and control cabinet and configured to scan a cone-beam X-ray toward an object along a given orbit to acquire cone-beam data in which a three-dimensional distribution of an X-ray absorption coefficient within the ob... | 06/14/2005 |
| 6904124 | Indirect programming of detector framing node A real time imaging system includes a programmable detector framing node controlling generation of radiation and controlling radioscopic image detection. Radioscopic image data is acquired and communicated by the detector framing node independently of a host compute... | 06/07/2005 |
| 6904117 | Tilted gantry helical cone-beam Feldkamp reconstruction for multislice CT An X-ray computed tomography apparatus includes a helical scanning device configured to collect projection data while at least one of a gantry and a couch moves along a body axial direction of an object on the couch when at least one of the gantry and the couch is t... | 06/07/2005 |
| 6901130 | Retrospective and/or window-controlled filtering of images for adapting sharpness and noise in computed tomography A method is for window-controlled filtering of CT images. A CT raw data record is acquired, for example, with the aid of a CT unit or of a C-arc unit. A primary data record is then reconstructed from the CT raw data record by way of, for example, a sharp convolution... | 05/31/2005 |
| 6901129 | X-ray computer tomography apparatus An X-ray absorptance map associated with an object to be examined is generated on the basis of scanogram data obtained from a predetermined direction of the object, and imaging conditions are determined on the basis of the absorptance map. Before tomography, an inde... | 05/31/2005 |
| 6898264 | Method of reconstructing images for spiral and non-spiral computer tomography General scheme processes and systems for constructing algorithms for reconstructing images of objects that have been scanned in a spiral or non-spiral fashions with detectors. Application of the scheme requires finding of a weight function, which would lead to the r... | 05/24/2005 |
| 6898263 | Method and apparatus for soft-tissue volume visualization A method for obtaining data including scanning an object using a multi-energy computed tomography (MECT) system to obtain data to generate an anatomical image, and decomposing the obtained data to generate a first density image representative of bone material and a ... | 05/24/2005 |
| 6891920 | Automated background processing mammographic image data Disclosed is a mammographic imaging system and tools for processing mammographic images to enhance image acquisition and review workflow. The systems and tools enable rapid access to digital image information providing for improved workflow management and identifica... | 05/10/2005 |
| 6891922 | Methods and apparatus for the classification of nodules A method for detection and classification of nodules (N) in a tomographic image of an anatomical zone of a patient includes segmenting the image to identify therein a region of interest including at least one nodule, and classifying regions of the nodule as one of s... | 05/10/2005 |
| 6888915 | Method for reconstruction of an image of a moving object A very fast reconstruction is undertaken in an image reconstruction process by tomography, by dividing measurements through the subject into a series of subsequent sets that are inverted by back projections giving partial result blocks used to search for the change ... | 05/03/2005 |
| 6888914 | Methods and apparatus for computing volumetric perfusion A method for computing volumetric perfusion in a spatially stationary organ using a computed tomography (CT) imaging system includes positioning an area detector such that the area detector encompasses a spatially stationary organ within the field of view of the ima... | 05/03/2005 |
| 6888916 | Preprocessing methods for robust tracking of coronary arteries in cardiac computed tomography images and systems therefor Preprocessing methods of this invention remove data relating to cavities of the heart, and improve density mix of parts left therein during CT imaging, so as to allow coronary arteries to be more accurately tracked with conventional tracking algorithms than currentl... | 05/03/2005 |
| 6879656 | Method and apparatus for deriving motion information from projection data One or more techniques are provided for deriving motion data from a set of CT projection data. The techniques calculate moments associated with consistency conditions for the projection data to derive motion data from the projection data. One aspect of the present t... | 04/12/2005 |
| 6876718 | Scatter correction methods and apparatus A method is provided which includes scanning an object with a cone beam volumetric computed tomography (CBVCT) system with a beam pass array positioned between an x-ray source of the CBVCT system and the object to acquire scatter data, scanning the object with the C... | 04/05/2005 |
| 6873675 | Multi-sector back-off logic algorithm for obtaining optimal slice-sensitive computed tomography profiles A multi-sector back-off logic algorithm for obtaining optimal slice-sensitive computed tomography (“CT”) profiles. The systems and methods of the present invention improving the temporal resolution of a CT system by checking for Z location errors between sectors... | 03/29/2005 |
| 6873721 | Method and device for determining an angled structure in the surface of a precision machined cylindrical work piece A method for determining a helical groove structure, for example in the form of flutes, in the surface of a finely finished cylindrical workpiece, in particular the ground mating bearing surface of radial shaft sealing rings, which is characterized in that a camera ... | 03/29/2005 |
| 6873676 | Convolution reconstruction algorithm for multi-slice CT A multi-slice computed tomography imaging system (10) is provided including a source (18) generating a x-ray beam (32). A detector array (20) receives the x-ray beam (32) and generates projection data. A translating table (22 | 03/29/2005 |
| 6873679 | Multi-row detector X-ray CT apparatus For the purpose of obtaining an image having a large slice thickness, such as a thickness twice or three times the size of a multi-row detector as measured in the Z′-axis direction, based on raw data collected by an axial scan or helical scan using the detector, r... | 03/29/2005 |
| 6865246 | True 3D cone-beam imaging method and apparatus A three-dimensional image of an object scanned with a plurality of cone-beam projections from a number of source positions is reconstructed using a method wherein intermediate transform functions are obtained from two-dimensional images of radiation attenuation in t... | 03/08/2005 |
| 6862336 | X-ray CT apparatus and method of controlling it For the purpose of determining an offset of the position of an X-ray tube from a prespecified position, and correcting axially projected data D1 and pixel projection data D2 based on the determined offset, proper axially projected data D1 can be... | 03/01/2005 |
| 6862334 | Method of reducing noise in volume imaging In a method of visualizing a three-dimensional volume image data set (1), a two-dimensional image (15) is formed by projecting volume image data on a projection plane in that for each pixel (16) there is determined an intensity value which corre... | 03/01/2005 |
| 6862335 | System and method for iterative reconstruction of cone beam tomographic images A method for refining image data from measured projection data acquired from a computed tomographic scanner is provided. Initially, measured projection data from the computed tomographic scanner is received. The measured projection data is reconstructed to generate ... | 03/01/2005 |
| 6859511 | X-ray sensor signal processor and x-ray computed tomography system using the same An X-ray sensor signal processor including capacitors 114 for removing DC components (dark currents) from output signals of semiconductor sensors 21 to 2n detecting pulse-like X-rays passed through an object, and integrators (each of whic... | 02/22/2005 |
| 6859513 | Radiographic apparatus and method, and control apparatus and method upon radiography A radiographic apparatus for obtaining an X-ray image on the basis of examination request information received from an externa ol apparatus, determines a radiographing condition by giving the received examination request information preference to a default radiograp... | 02/22/2005 |
| 6859512 | Method for computer tomography and computer tomography device for carrying out the method Cone-beam computed tomography method to scan an object using a multi-row detector system. The focal point is displaced on a focal path about the system axis, without any relative movement between the object to be examined and the focal point, in the direction of the... | 02/22/2005 |
| 6856666 | Multi modality imaging methods and apparatus A method includes scanning an object in a first modality having a first field of view to obtain first modality data including fully sampled field of view data and partially sampled field of view data. The method also includes scanning the object in a second modality... | 02/15/2005 |
| 6853700 | Data processing method and data processing apparatus A data processing apparatus comprising a display device for displaying the data; the first recording device for recording the large volume bit map data; the second recording device recording an index data formed as a two-dimensional image obtained by rendering the l... | 02/08/2005 |
| 6850587 | Reprojection-based three-dimensional image reconstruction A method of reconstructing a three-dimensional image from a set of X-ray projections generated by a scanning system, where the image corresponds to a first volume segment that is a portion of a longer object, includes reconstructing a first estimate image of a secon... | 02/01/2005 |
| 6850585 | Progressive updating approach for volumetric CT image reconstruction In overlapping reconstruction for multi-slide spiral CT, adjacent slices of an object typically only have small differences. Based on this property, a progressive updating approach for volumetric ct image reconstruction includes a method and apparatus to use the wel... | 02/01/2005 |
| 6845142 | Image processing involving correction of beam hardening An image processing apparatus is provided for processing a plurality of sets of projection data acquired by radiating an X-ray onto an object in a multitude of directions. The apparatus has a correcting unit and a reconstructing unit. The correcting unit corrects th... | 01/18/2005 |
| 6845143 | CT image reconstruction A method for artifact reduction in CT images comprising reconstructing a first data image using an inexact reconstruction algorithm, segmenting the first data image to provide a second image with high attenuation objects separate from low attenuation objects, reproj... | 01/18/2005 |
| 6845144 | Three dimensional back projection method and an X-ray CT apparatus To perform cone beam reconstruction by using projection data correctly corresponding to X-ray beam having passed through each pixel in the reconstruction area, data D1 is obtained which is plane projected to a plane based on projection data D0. Then, p... | 01/18/2005 |
| 6842499 | Method and apparatus for connecting temporally separated sinograms in an EBT scanner A method and apparatus are disclosed in an EBT scanner for generating an image from a data set collected from a subject beginning at an arbitrary time within a scanning time interval. A sequence of temporally separated, unfolded parallel view sinograms are generated... | 01/11/2005 |
| 6839400 | Image reconstruction method for computed tomography A method for computed tomography, includes, in order to scan an object to be examined with a conical beam originating from a focus and with a matrix-like detector array for detecting the beam, the focus is moved, relative to the object to be examined, on a focal pat... | 01/04/2005 |
