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| Number | Title | Issue Date |
| 7340354 | Method for detection of a stable installation of a system having a rotating device therein In a method for detection of a stable installation of a system that has a rotation device mounted to rotate around a system axis and an arrangement for detection of measurement values indicative of oscillation of the rotation device, a statistical spread of the meas... | 03/04/2008 |
| 7333587 | Method and system for imaging using multiple offset X-ray emission points A technique is provided for imaging a field of view using an X-ray source comprising two or more emission points. Each emission point is configured to emit a fan of radiation encompassing less than the entire field of view. The emission points are activated individu... | 02/19/2008 |
| 7333588 | Virtual spherical anode computed tomography An x-ray computed tomography system uses a broad area x-ray emitter and detector to allow both in plane and out of plane x-ray projections not restrained to spiral or helical scans. ... | 02/19/2008 |
| 7322745 | Single boom cargo scanning system The inspection methods and systems of the present invention are mobile, rapidly deployable, and capable of scanning a wide variety of receptacles cost-effectively and accurately on uneven surfaces. The present invention is directed toward a portable inspection syste... | 01/29/2008 |
| 7324623 | Computed tomography scanner with large gantry bore A computed tomography scanner includes a rotating gantry (20) defining an examination region (16). A first radiation source (22) is disposed on the rotating gantry (20) and emits first radiation (32) into the examination region ( | 01/29/2008 |
| 7313214 | Computed tomography unit having an aperture stop A computed tomography unit includes at least one X-ray tube, that scans an object in a fashion rotating in a circle or spiral about a z-axis, in combination with an oppositely situated detector having a multiplicity of detector rows. Each detector row includes an ap... | 12/25/2007 |
| 7305063 | Cylindrical x-ray tube for computed tomography imaging A computed tomography imaging system includes an x ray tube (12, 212) that injects an x ray conebeam into an examination region (14). The x ray tube (12, 212) includes a rotating cylindrical anode (30, 230, 330, 430) having a target outer... | 12/04/2007 |
| 7292717 | Computer tomography method using redundant measured values The invention relates to a computer tomography method in which a radiation source moves relative to an examination region along, in particular, a helical or circular trajectory. Measured values are acquired by a detector unit and a CT image of the examination region... | 11/06/2007 |
| 7277522 | Method for focus adjustment in a CT apparatus In a method for non-iterative focus adjustment in a CT apparatus the position of the center ray with regard to the movement direction of the focus and the correct phase between the detector sampling frequency and the focus springing frequency are calculated with a m... | 10/02/2007 |
| 7263156 | Method and apparatus to facilitate computerized tomography of relatively large objects A computerized tomography process (100) that provides, optionally, for preliminary scans (101), helically-oriented full scans (102), and/or improved resolution scans (103). In some instances, partial cross-sectional views are captured whi... | 08/28/2007 |
| 7238947 | Medical information processor, image photographing system, and absorption coefficient calibration method Data of arbitrary penetration thickness can be easily obtained in carrying out a beam hardening calibration. A center tomographic image reconstructed parallel to a center line of a projection data of a water phantom and an X-ray tube is read from an image data serve... | 07/03/2007 |
| 7221728 | Method and apparatus for correcting motion in image reconstruction One or more techniques are provided for adapting a reconstruction process to account for the motion of an imaged object or organ, such as the heart. In particular, projection data of the moving object or organ is acquired using a slowly rotating CT gantry. Motion da... | 05/22/2007 |
| 7221732 | Method and apparatus for producing laminography images using a fixed x-ray source An imaging system and method for taking an image of an object. The imaging system comprises a mechanism that propels the object linearly in a direction of motion through an imaging region that has a top, bottom, front, and rear; an x-ray source located below the bot... | 05/22/2007 |
| 7212603 | Device for capturing structural data of an object To simplify the reconstruction of structural data of an object (7) examined using a tomography device (1), it is proposed to implement a radiation source (4) in such a way that radiation bundles (6) with parallel beam geometry are produce... | 05/01/2007 |
| 7209580 | Fast computed tomography method The invention relates to a computed tomography method for forming images of an object to be examined which is arranged in an examination zone. The examination zone is scanned by means of a conical X-ray beam. In order to enable images having a high image quality to ... | 04/24/2007 |
| 7197109 | Real-time digital x-ray imaging apparatus A x-ray diagnostic apparatus and methods perform Real-Time Digital Radiography with particular application in dental x-ray imaging modalities, such as Orthopantomography, Scannography, Linear Tomography and Cephalography, by using a versatile and robotized mechanica... | 03/27/2007 |
| 7190758 | X-ray CT system A method for performing scattered radiation correction. The position of a collimator and the width of a slit are adjusted so that direct radiation will fall on one of a plurality of arrays of detectors. A predetermined phantom is scanned. The scan is performed relat... | 03/13/2007 |
| 7180975 | System and method for exact image reconstruction for helical cone beam computed tomography including redundant data A conebeam computed tomography scanner (10) acquires conebeam projection data along a generally helical source trajectory around an examination region (14). An exact reconstruction processor (40) includes a convolution processor (42) and ... | 02/20/2007 |
| 7085352 | Electron emitter assembly and method for generating electron beams An electron emitter assembly and a method for generating electron beams are provided. The electron emitter assembly includes a light source configured to emit light. The electron emitter assembly further includes a photo-responsive device operably coupled to an elec... | 08/01/2006 |
| 7085343 | X-ray computed tomography apparatus An X-ray computed tomography apparatus of this invention includes a first data detecting system which includes a first X-ray tube and a first X-ray detector and a second data detecting system which includes a second X-ray tube and a second X-ray detector. A reconstr... | 08/01/2006 |
| 7072436 | Volumetric computed tomography (VCT) The present invention provides a volumetric computed tomography (VCT) system capable of producing data for reconstructing an entire three-dimensional (3D) image of a subject during a single rotation without suffering from cone beam artifacts. The VCT system comprise... | 07/04/2006 |
| 7050527 | Methods and apparatus for artifact reduction in cone beam CT image reconstruction In one aspect, a method for producing an image of an object utilizing a computed tomography (CT) imaging system includes axially scanning an object utilizing the CT imaging system to obtain more than 180° of projection data of the object. The method also includes w... | 05/23/2006 |
| 7020511 | Method for three dimensional cine EBA/CTA imaging Certain embodiments of the present invention provide a method for three-dimensional cine EBA/CTA imaging. The method includes monitoring a cardiac cycle of a patient and selecting a trigger point along the cardiac cycle. When the cardiac cycle of the patient reaches... | 03/28/2006 |
| 7013037 | Image cropping of imaging data and method A technique for selectively processing data from a digital detector includes determining an image area produced by orientation of a radiation source assembly. The assembly may include a radiation source and a collimator, which may be separately orientable. The image... | 03/14/2006 |
| 7003174 | Removal of block encoding artifacts A method of reducing artifacts in an image previously processed by block transform encoding may comprise the steps of: determining block boundaries; determining an approximate metric of artifact visibility; ... | 02/21/2006 |
| 6990175 | X-ray computed tomography apparatus An X-ray computed tomography apparatus includes a first X-ray tube configured to generate X-rays with which a subject to be examined is irradiated, a first X-ray detector configured to detect X-rays transmitted through the subject, a second X-ray tube which generate... | 01/24/2006 |
| 6980681 | Methods and apparatus for helical reconstruction for multislice CT scan One embodiment of the present invention is a method for imaging an object with a computed tomographic (CT) imaging system that includes steps of helically scanning the object with a multi-slice CT imaging system to acquire attenuation measurements of the object, the... | 12/27/2005 |
| 6965689 | Image based volumetric measuring device A measuring device for calculating sample volumes and changes in sample volumes is disclosed. The device includes a rotatable platform upon which the sample is placed and rotated in increments with an image of the sample being recorded at each rotational position to... | 11/15/2005 |
| 6963326 | Frequency switching method of a CPU The invention is a frequency switching method of a CPU in electronic devices. The electronic device is comprised of a display screen and the CPU. The screen display changes according to the pixel clock. The method lowers the frequency of the pixel clock, switching t... | 11/08/2005 |
| 6944259 | Versatile cone-beam imaging apparatus and method 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... | 09/13/2005 |
| 6907110 | X-ray tube with ring anode, and system employing same An x-ray tube has a stationary vacuum housing, in which are arranged an electron-emitting cathode and a ring anode with an impact surface on which the electron beam, accelerated by an electrical field, is incident, as well as a deflection system to focus and deflect... | 06/14/2005 |
| 6256369 | Computerized tomography scanner with longitudinal flying focal spot In an improved computerized tomography scanner, the X-ray source is configured to have a focal spot that is variable in position in a direction parallel to or substantially parallel to the longitudinal or rotation axis of the scanner. Data are sampled fro... | 07/03/2001 |
| 6118841 | Detector array geometry for helical scanning volumetric computed tomography system In an improved method and apparatus for cone-beam reconstruction, an improved detector array is provided in an asymmetric shape with respect to the translation axis. In a first embodiment, a standard symmetric array is rotated by a tilt angle abou... | 09/12/2000 |
| 6038518 | Error correction of system transfer function by use of input compensation A technique to modify the input data to any system so as to cancel errors in the transfer function of that system. The system error response to each possible input amplitude transition is determined. A compensating input sequence is calculated which compe... | 03/14/2000 |
| 6005908 | X-ray computed tomography apparatus with radiation detector which reduces image unsharpness An X-ray computed tomography apparatus has a radiation detector composed of X-ray converters so that the scattering of light in a scintillator or the inductive disturbance in a directly converting semiconductor is minimized or eliminated. Each X-ray conve... | 12/21/1999 |
| 5396528 | Tomographic image reconstruction using cross-plane rays A CT apparatus employing a cone beam of x-rays reduces image artifacts by employing full as opposed to half scans of less than 360°. The present invention recognizes that rays of a cone beam that cross the imaging plane are not redundant with opposing ra... | 03/07/1995 |
| 5377250 | Reconstruction method for helical scanning computed tomography apparatus with multi-row detector array An x-ray computed tomography system for helically scanning a patient, by translating the patient as projections of the patient at various beam angles are obtained, employs a detector array having multiple rows displaced in along the direction of translati... | 12/27/1994 |
| 5365560 | Method and apparatus for acquiring a uniform distribution of radon data sufficiently dense to constitute a complete set for exact image reconstruction of an object irradiated by a cone beam source A method and apparatus for acquiring scanning cone beam projection data along a three dimensional scanning trajectory is disclosed. The technique ensures acquisition of a substantially uniform distribution of Radon data that is sufficiently complete for e... | 11/15/1994 |
| 5333164 | Method and apparatus for acquiring and processing only a necessary volume of radon data consistent with the overall shape of the object for efficient three dimensional image reconstruction An improved method and apparatus is disclosed for retaining only necessary cone beam projection data acquired along a three dimensional scanning trajectory in order to ensure more computationally efficient processing of Radon data for computerized tomogra... | 07/26/1994 |
| 5311427 | Method for removing artifact and for correcting sensitivity of single photon emission computerized tomography and apparatus thereof A single photon emission computerized tomographic (SPECT) image acquiring method in which a fan-beam collimator radiation emitted from a radio isotope (RI) supplied into a biological body under medical examination is received with employment of a gamma ca... | 05/10/1994 |
