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| Number | Title | Issue Date |
| 8184768 | X-ray CT apparatus and method for controlling X-ray tube This embodiment is provided with a detector configured to detect an X-ray radiated from an X-ray tube, a reconstructing part configured to reconstruct an image from projection data based on the detection by the detector, an acquiring part configured to acquire a par... | 05/22/2012 |
| 8175217 | X-ray CT apparatus An X-ray CT apparatus is provided with an X-ray tube current modulation pattern calculation means that calculates an X-ray tube current modulation pattern based on a 3-dimensional model of an object calculated based on a scanogram image of the object, start-up shape... | 05/08/2012 |
| 8064569 | X-ray CT imaging apparatus and imaging control method therefor An X-ray CT imaging apparatus includes an X-ray generating section, an X-ray image capturing section, a supporting section, a holding section, a rotation driving section, and an X-ray controlling section, wherein the X-ray generating section generates an X-ray cone ... | 11/22/2011 |
| 8031831 | Voltage and or current modulation in dual energy computed tomography To prevent patients from being overexposed or underexposed, it has been attempted to modulate either voltage or current in conventional single energy CT systems. The voltage modulation causes incompatibility in projection data among the views while the current modul... | 10/04/2011 |
| 7995703 | Method for controlling X-ray exposure in X-ray CT system A method for controlling automatic X-ray exposure in an X-ray CT system includes establishing a correspondence table or function relationship between a ratio factor and an offset of a geometrical center of a scanned section, wherein the ratio factor represents a rat... | 08/09/2011 |
| 7970098 | Medical imaging method and apparatus allowing localized image quality specification In a method and device for medical imaging, a number of input parameters with regard to an image exposure are imported into a controller of the imaging device, that associate a desired image quality with a defined image exposure region. A number of control parameter... | 06/28/2011 |
| 7945013 | X-ray CT apparatus An X-ray CT apparatus acquires a scanogram of an object to be examined, generates an ellipse model having an X-ray attenuation coefficient equivalent to that of water and approximated to a tomographic image of the obtained imaged portion from the feature quantity of... | 05/17/2011 |
| 7912176 | Dose-sparing tomographic imaging A system includes emission of a first plurality of radiation beams from respective ones of a first plurality of locations along a first arc, acquisition of a first plurality of projection images of a target based on the first plurality of radiation beams, emission o... | 03/22/2011 |
| 7852979 | Dual-focus X-ray tube for resolution enhancement and energy sensitive CT A CT system includes a rotatable gantry having an opening for receiving an object to be scanned, at least one x-ray source coupled to the gantry and configured to project x-rays toward the object, a detector coupled to the gantry and having a scintillator therein an... | 12/14/2010 |
| 7826587 | System and method of fast kVp switching for dual energy CT A CT system includes a gantry, an x-ray source, a generator configured to energize the x-ray source to a first kVp and to a second kVp, a detector, and a controller. The controller is configured energize the x-ray source to the first kVp for a first time period, sub... | 11/02/2010 |
| 7813474 | Method and apparatus for performing dual-spectrum CT with fast KV modulation at multiple-view intervals A CT system includes a rotatable gantry having an opening for receiving a subject to be scanned, a rotatable gantry having an opening for receiving a subject to be scanned, an x-ray source configured to project x-rays having multiple energies toward the subject, and... | 10/12/2010 |
| 7792241 | System and method of fast KVP switching for dual energy CT A CT system includes a rotatable gantry having an opening for receiving an object to be scanned and an x-ray source coupled to the gantry and configured to project x-rays through the opening. The x-ray source includes a target, a first cathode configured to emit a f... | 09/07/2010 |
| 7782999 | Systems and methods for scanning and data acquisition in computed tomography (CT) applications Systems and methods for data acquisition in computed tomography (CT) applications are provided. The systems and methods are particularly adapted for scanning and acquiring/processing data in connection with high-power cone-beam CT applications. The electron beam is ... | 08/24/2010 |
| 7769127 | Pre-subject filters for CT detectors and methods of making same Cast collimators for use in CT imaging systems are described, as are methods of making them. Such collimators may comprise pre-patient collimators, pre-patient filter/collimator assemblies, and/or post-patient collimators. The filters and/or collimators may be made ... | 08/03/2010 |
| 7756243 | Dose evaluating method and X-ray CT apparatus With the objective of evaluating whether a dose is excessive for a subject, such a dose that image noise reaches less than or equal to a predetermined value is estimated upon an axial scan on the basis of projection data acquired by a scout scan. The dose is set as ... | 07/13/2010 |
| 7715522 | X-ray CT apparatus An X-ray CT apparatus inputs information with respect to a target tissue of the object to be discriminated in the tomographic image and inputs an index with respect to correctness of the discrimination, and determines scanning conditions for discriminating the targe... | 05/11/2010 |
| 7711082 | X-ray CT apparatus and X-ray CT imaging method An X-ray CT apparatus includes an X-ray generating section for generating X-rays with a plurality of X-ray tube voltages; a data collecting section for collecting, synchronously with a data collection signal, X-ray projection data from X-rays with each X-ray tube vo... | 05/04/2010 |
| 7688938 | Method and apparatus for low dose computed tomography A computed tomography machine (1) provides for improved dose efficiency by calculating an optimized set of beam intensities to produce the desired image quality. Determination of the beam weights is based on an a priori modeling (53) of the properties ... | 03/30/2010 |
| 7668288 | Discrete sampling of gamma ray field over multiple portions using multiple heads with spaces between the different portions A medical imaging system, e.g., a computed tomography system includes at least one radiation detector that is relatively rotatable with respect to an object of interest. The angular range is divided into discrete continuous acquisition ranges and unsampled angular r... | 02/23/2010 |
| 7649974 | Method and system for controlling an X-ray imaging system Methods and systems for controlling an X-ray imaging system. The method for controlling an X-ray imaging system includes acquiring a plurality of subviews of patient attenuation data wherein a first set of subviews of patient attenuation data is acquired at a first ... | 01/19/2010 |
| 7636416 | X-ray CT apparatus comprising a tube current control unit An X-ray CT apparatus includes a projection data analysis part that reconstructs a tomographic image at an imaging portion of the object used for analysis from the projection data and produces a control profile by reprojecting the reconstructed tomographic image, an... | 12/22/2009 |
| 7620142 | Method and apparatus for reducing x-ray dosage in CT imaging prescription The present invention is directed to a networked scanner environment wherein each scanner is communicatable with one or more databases configured to store data associated with previously executed imaging sessions. The one or more databases may be queried by a user t... | 11/17/2009 |
| 7587023 | Method and apparatus for achieving optimal radiation dose in coronary CT angiography using standard deviation of CT number A radiation dose modulation apparatus controls radiation dose in coronary CT angiography that utilizes an X-ray CT system including a multi-row detector. The apparatus is provided with a tube current modulation table storage unit which classifies standard deviation ... | 09/08/2009 |
| 7573975 | Method and device for shaping an energy input beam An irradiation method, in particular for imaging a region of investigation (2) of an object (1), comprises generating at least one energy input beam (3) with at least one energy input beam source (210), wherein the at least one energy inp... | 08/11/2009 |
| 7558364 | Dynamic dose control for computed tomography In a dose modulation method, transmission tomographic imaging data of an associated imaging subject are acquired using a radiation source (14) revolving around the associated imaging subject. During the tomographic imaging, an estimated attenuation of radiati... | 07/07/2009 |
| 7558365 | Scanning detection device of an X-ray CT apparatus, an X-ray CT system, and method of operation of the same Method of operating an X-ray CT apparatus and the corresponding apparatus and system thereof. A method includes analyzing scout scan data to obtain a position with a minimum noise index and a position with a maximum noise index, calculating noise indexes at the two ... | 07/07/2009 |
| 7502439 | Radiographic apparatus and method of using the same To enable radiation rays to be efficiently used. A scout scan parameter setting unit sets a rotation movement position to which an X-ray tube and an X-ray detector are moved so as to rotate around a subject on the basis of subject information of a subject on which a... | 03/10/2009 |
| 7466792 | System for producing CT image data records and for irradiating a tumor patient A system includes exactly one rotary frame for holding at least one x-ray tube, and one radiation detector that is situated opposite, the x-ray tube being equipped with a diaphragm that can be dynamically adjusted. The system includes a first operating mode for imag... | 12/16/2008 |
| 7428291 | Operating method for an X-ray apparatus, operating method for a computer, and items corresponding to said operating methods An X-ray apparatus has a recording assembly and a control device. The recording assembly has an X-ray source and detector, an aperture device, and a swiveling axis. An object having an object area constant and an object area changing over time is arranged that the o... | 09/23/2008 |
| 7424090 | Apparatus for acquisition of CT data with penumbra attenuation calibration The present invention is a directed method and apparatus for collimating a radiation beam such that the full intensity of the radiation beam does not impinge detectors of a radiation detector assembly that are particularly susceptible to saturation or over-ranging. ... | 09/09/2008 |
| 7391843 | Systems and methods for adjusting noise in a medical imaging system A method for adjusting noise in an imaging system is described. The method includes adjusting, by a processor, a noise within an image based on a patient size. ... | 06/24/2008 |
| 7372936 | Radiation computed tomography apparatus and tomographic image data generating method A radiation computed tomography apparatus that includes a radiation detector having a plurality of radiation detector elements arranged in a two-dimensional manner for detecting radiation passing through a subject, and a reconstructing device for arithmetically reco... | 05/13/2008 |
| 7372942 | Medical imaging system with dosimetry for estimating circuit board life A dosimeter is provided on or adjacent to a circuit board deployed in a radiation environment. The dosimeter may be read or output a value or values indicating radiation dosage over a period of time. The radiation dosage associated with the circuit board may be used... | 05/13/2008 |
| 7372937 | Systems and methods of non-standard spiral cone-beam computed tomograpy (CT) Provided herein are methods of reconstructing an image from projection data provided by a tomography scanner that is based on geometric optics comprising scanning an object in a cone-beam imaging geometry following a non-standard spiral path or a general piecewise s... | 05/13/2008 |
| 7363255 | Apparatus unit replacement assisting method and system By providing an apparatus unit replacement assisting method, in which, upon receipt of a request from a first user to replace a first unit comprising part of an apparatus with a second unit, the second unit is offered to the first user at a price after the deduction... | 04/22/2008 |
| 7359488 | Technique for digitally removing x-ray scatter in a radiograph Methods and apparatus for generating an x-ray image. An object is interposed between a detector and an x-ray source. A grid is interposed between the x-ray source and the object. The grid is exposed to primary x-ray energy generated by the x-ray source, thereby expo... | 04/15/2008 |
| 7340030 | Asymmetric cone beam A multislice CT scanner for imaging a patient comprising: an X-ray source that generates a cone beam of X-rays radiated from a focal spot of the X-ray source wherein the X-ray source is moveable in a rotation plane so as to rotate the focal spot about an axial direc... | 03/04/2008 |
| 7336762 | Scan program communication method and X-ray CT apparatus An X-ray CT apparatus includes a host and a scanner that executes a scan based on a scan program communicated from the host by means of communicating means. The X-ray CT apparatus also includes a communicating means which collectively communicate the calculated valu... | 02/26/2008 |
| 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 |
| 7330535 | X-ray flux management device The invention is directed to an x-ray flux management device that adaptively attenuates an x-ray beam to limit the incident flux reaching a subject and radiographic detectors in potentially high-flux areas while not affecting the incident flux and detector measureme... | 02/12/2008 |
