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| Number | Title | Issue Date |
| 7474736 | Devices and methods for providing spatially variable x-ray beam intensity An apparatus for modulating an intensity of a radiation beam includes a filter having a cross sectional shape such that a radiation beam filtered therethrough and passed through a patient will have an intensity that is substantially non-uniform. An apparatus for mod... | 01/06/2009 |
| 7430282 | Heel effect compensation filter X-ray irradiator, X-ray CT scanner and method for X-ray CT imaging A heel effect compensation filter is configured to have a thickness distribution that uniforms an X-ray intensity angular distribution that is nonuniform in the body axis direction of a subject in an X-ray flux irradiated space. The space is formed by an X-ray flux ... | 09/30/2008 |
| 7397904 | Asymmetric flattening filter for x-ray device Devices and methods for implementing selective, or asymmetric, attenuation of an x-ray beam. In one example, a filter is provided that is substantially in the form of a wedge where some portions of the filter are thicker, and thus provide greater attenuation, than o... | 07/08/2008 |
| 7336769 | 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... | 02/26/2008 |
| 7315611 | X-ray reflector exhibiting taper, method of making same, narrow band x-ray filters including same, devices including such filters, multispectral x-ray production via unispectral filter, and multispectral x-ray production via multispectral filter An x-ray reflector may include: a substrate; a first layer formed on the substrate, the first layer including a relatively higher-Z material, where Z represents the atomic number; and a second layer formed on the first layer, the second layer including a relatively ... | 01/01/2008 |
| 7310405 | High-Z cast reflector compositions and method of manufacture A scintillator pack comprises an array of scintillator pixels and an x-ray absorbing layer disposed in inter-scintillator regions between the scintillator pixels. The x-ray absorbing layer acts to absorb x-rays and protect underlying regions of the inter-scintillato... | 12/18/2007 |
| 7308073 | X-ray filter having dynamically displaceable x-ray attenuating fluid A bowtie filter is constructed to have a fluidic envelope filled with attenuating fluid and a displacement insert that can present various x-ray attenuation profiles during a scan. The insert is designed to displace the attenuating fluid to achieve a denied attenuat... | 12/11/2007 |
| 7260182 | Method and apparatus of radiographic imaging with an energy beam tailored for a subject to be scanned A method and apparatus for tailoring the profile of an x-ray beam for radiographic imaging for a specific subject is disclosed. The invention includes a filter assembly having a pair of filters, each of which may be dynamically controlled by a motor assembly during ... | 08/21/2007 |
| 7257197 | Reflector rack, fabrication method thereof, and narrow brand x-ray filter and system including same A stackable rack may comprise: at least two rails, a cross-section of each rail having a shape resembling a staircase, first step portion of which represents a first surface upon which a reflector can be disposed; and a second step portion of which represents a seco... | 08/14/2007 |
| 7254216 | Methods and apparatus for filtering a radiation beam and CT imaging systems using same A filter assembly for a computed tomographic imaging system includes first and second endplates at opposite ends of the filter assembly. Also provided is a first moveable subassembly that includes at least a first x-ray filter and which is configured to move along a... | 08/07/2007 |
| 7183554 | Detection of nuclear weapons and fissile material abroad cargo containerships A radiation detection system that measures radiation (e.g., signature energy-level gamma radiation and neutrons) is employed aboard a ship or other transport vehicle along with conventional cargo to monitor for the presence of a fissile material, as would be found i... | 02/27/2007 |
| 7180081 | Discharge produced plasma EUV light source An DPP EUV source is disclosed which may comprise a debris mitigation apparatus employing a metal halogen gas producing a metal halide from debris exiting the plasma. The EUV source may have a debris shield that may comprise a plurality of curvilinear shield members... | 02/20/2007 |
| 7088799 | Method and apparatus for presenting multiple pre-subject filtering profiles during CT data acquisition The present invention is directed to a method and apparatus for CT data acquisition using a rotatable pre-subject filter having more than one filtering profile to control radiation exposure to a subject. The filter is caused to rotate by a motor and bearing assembly... | 08/08/2006 |
| 7082189 | X-ray distribution adjusting filter apparatus and X-ray CT apparatus using the same An X-ray distribution adjusting filter apparatus for supplying a desired X-ray intensity distribution or adjusting the X-ray distribution to a desired profile, the bowtie filter as the X-ray distribution adjusting filter apparatus has a fixed section having a base p... | 07/25/2006 |
| 7076029 | Method and apparatus of radiographic imaging with an energy beam tailored for a subject to be scanned A method and apparatus for tailoring the profile of an x-ray beam for radiographic imaging for a specific subject is disclosed. The invention includes a filter assembly having a pair of filters, each of which may be dynamically controlled by a motor assembly during ... | 07/11/2006 |
| 7058157 | Method for producing images with the aid of a spiral computed tomography unit, and a spiral computed tomography unit A weighted method is for producing images with the aid of a spiral computed tomography unit. Further, in a CT unit, the detector and beam are tuned to one another in such a way that a drop in dose rate occurs at the edges within the detector. The form of the weighti... | 06/06/2006 |
| 7046756 | Rotatable filter for a pre-subject CT collimator having multiple filtering profiles The present invention is directed to a method and apparatus for CT data acquisition using a rotatable pre-subject filter having more than one filtering profile to control radiation exposure to a subject. The filter has one profile used to filter radiation when the r... | 05/16/2006 |
| 7012990 | X-ray radiographic apparatus, X-ray restrictor, and X-ray radiographic method A switching mechanism is configured such that a lower limb radiographic filter 11a is moved inside a radiation field of the X-rays that is an opening portion of an X-ray movable restriction only when radiographing a region of a subject from the groin t... | 03/14/2006 |
| 7010094 | X-ray inspection using spatially and spectrally tailored beams A system and method for inspecting an object, the system and method comprising a source for generating a penetrating radiation beam for irradiating the object, the beam having, for each instant of time, an instantaneous energy spectrum of intensity, a shaper for mod... | 03/07/2006 |
| 6968030 | Method and apparatus for presenting multiple pre-subject filtering profiles during CT data acquisition The present invention is directed to a method and apparatus for CT data acquisition using a rotatable pre-subject filter having more than one filtering profile to control radiation exposure to a subject. The filter is caused to rotate by a motor and bearing assembly... | 11/22/2005 |
| 6954516 | Imaging systems and methods A method for obtaining data includes scanning an organ with an imaging system emitting X-rays and modulating the emitted X-rays with an organ specific bowtie addition. ... | 10/11/2005 |
| 6920203 | Method and apparatus for selectively attenuating a radiation source A technique for selectively attenuating a radiation exposure in which a configurable collimator is employed between the radiation source and the radiation target. The configurable collimator typically comprises an array of independently addressable elements each of ... | 07/19/2005 |
| 6898271 | X-ray radiographic apparatus, X-ray restrictor, and X-ray radiographic method A switching mechanism is configured such that a lower limb radiographic filter 11a is moved inside a radiation field of the X-rays that is an opening portion of an X-ray movable restriction only when radiographing a region of a subject from the groin t... | 05/24/2005 |
| 6836535 | Method and apparatus of modulating the filtering of radiation during radiographic imaging The present invention includes a filtering apparatus for a CT imaging system or equivalently for an x-ray imaging system. The filtering apparatus may be translated along a first axis or a transverse axis to with respect to an attenuation pattern of a subject during ... | 12/28/2004 |
| 6754300 | Methods and apparatus for operating a radiation source A method for operating a radiation source includes providing a radiation source, providing a detector, and operating the radiation source and the detector such that the detector receives a substantially homogenous noise distribution. ... | 06/22/2004 |
| 6735273 | X-ray computed tomography apparatus and multi-spectra correction using a radiation pre-filter An X-ray computed tomography apparatus has a beam filter arrangement with regions of different filter material or/and different thickness profile of the filter material. This beam filter arrangement is disposed in the beam path preceding an examination subject. For ... | 05/11/2004 |
| 6647095 | Method and apparatus for optimizing dosage to scan subject The present invention is directed to a CT imaging system utilizing a pre-subject cone-angle dependent filter to optimize dosage applied to the scan subject for data acquisition. The cone angle dependent pre-subject filter is designed to have a shape that ... | 11/11/2003 |
| 6584173 | X-ray examination device comprising a manually adjustable filter The invention concerns an X-ray examination device, including an X-ray source and an X-ray detector, for forming an X-ray image of an object, an X-ray filter, arranged between the X-ray source and the X-ray detector, and adjusting circuit, connected to th... | 06/24/2003 |
| 6426999 | X-ray apparatus including a filter provided with filter elements having an adjustable absorption An X-ray apparatus with an X-ray source for producing a beam of X-rays, an X-ray detector for detecting the beam, and an X-ray filter with filter elements which is arranged between the X-ray source and the X-ray detector so as to attenuate the X-ray beam ... | 07/30/2002 |
| 6320938 | Method of X-ray protection during diagnostic CT imaging A shield is placed on a patient's body over a secondary organ adjacent a target organ. The shield is partially transparent to x-ray radiation. A CT scan of the target organ is conducted according to conventional protocols and technical parameters. No arti... | 11/20/2001 |
| 6307918 | Position dependent beam quality x-ray filtration The present invention, in one form, is an imaging system which, in one embodiment, utilizes a filter assembly including a plurality of filter portions for altering the intensity and quality of an x-ray beam. Specifically, in one embodiment, by positioning... | 10/23/2001 |
| 6289081 | Method of manufacturing a filter, a filter thus manufactured and an X-ray examination apparatus The invention relates to a method of manufacturing a filter which includes a number of ducts formed by a number of deformable foils. The foils have electrically insulating outer sides, with electrically conductive bands which are separated from one anothe... | 09/11/2001 |
| 6280084 | Methods and apparatus for indirect high voltage verification in an imaging system The present invention, in one form, is a system which, in one embodiment, utilizes a pre-patient filter to attenuate detector array signals to indirectly determine a voltage applied to an x-ray source. Specifically, in one embodiment, the pre-patient filt... | 08/28/2001 |
| 6201852 | Method and means for variably attenuating radiation A variable attenuation apparatus for use with a radiation-blocking liquid and a radiation source having an attenuation chamber capable of containing a layer of the radiation-blocking liquid and an adjustment device for selectively metering the thickness o... | 03/13/2001 |
| 6198806 | X-ray examination apparatus having an adjustable X-ray filter The invention relates to an X-ray examination apparatus which includes an X-ray filter for locally attenuating the X-ray beam. The X-ray filter includes a plurality of filter elements. The X-ray absorption of a filter element is adjusted by way of the qua... | 03/06/2001 |
| 6181774 | X-ray examination apparatus including an X-ray filter An X-ray examination apparatus of this invention comprises an X-ray source, an X-ray detector and an X-ray filter which is located between the X-ray source and the X-ray detector. The X-ray filter includes filter elements, notably capillary tubes, and the... | 01/30/2001 |
| 6148062 | X-ray beam-shaping filter and X-ray imaging machine incorporating such a filter A filter having compensating plates, each having a first plate element which can be moved translationally with respect to a frame and a second plate element which can be moved relative to the first plate element so that, when the plates are in an active p... | 11/14/2000 |
| 6125165 | Technique for attentuating x-rays with very low spectral distortion A method for attenuating x-rays which is insensitive to the x-ray energy employs forward scattering through a filter element to minimize energy shifts due to Compton scattering. Efficiency can be enhanced by employing a material with a large small angle s... | 09/26/2000 |
| 6108403 | X-ray equalization filter An object (22) is positioned on a patient support (25) between an x-ray source (10) and an x-ray detector assembly (15). The x-ray source (10) is selectively activated to transmit an x-ray beam (20) through an imaging region (32) to the x-ray detector ass... | 08/22/2000 |
| 6094474 | Hyper-transparency compensating device for a gantry mounting radiography apparatus The device is used for compensating a hyper transparency area due to air inside or outside an organ while using a gantry mounting radiography apparatus with digital subtraction (DSA). The device comprises compensating filters and a supporting assembly for... | 07/25/2000 |
