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8180016 |
X-ray CT apparatus and method thereof
In an X-ray CT apparatus 1 and an X-ray CT method, the thickness of an object to be inspected is computed on the basis of the number of transmitted X-rays in a specific energy range set above and...
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8165264 |
Method of pre-reconstruction decomposition for fast kV-switching acquisition in dual energy computed tomography (CT)
Fast kV-switching is a dual energy acquisition technique in computed tomography (CT) in which alternating views correspond to the low and high tube voltages. Its high temporal resolution and its...
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8160206 |
Dual-energy imaging at reduced sample rates
The present disclosure relates to the generation of dual-energy X-ray data using a data sampling rate comparable to the rate utilized for single-energy imaging. In accordance with the present...
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8155422 |
Dynamic optimization of the signal-to-noise ratio of dual-energy attenuation data for reconstructing images
It is described a method for dynamically optimizing the signal-to-noise ratio of attenuation data related to two different X-ray energies for reconstructing an image of an object under examination....
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8121248 |
X-ray detector methods and apparatus
A method includes performing an x-ray focal spot deflection to generate two complete projections from two different channels of an x-ray detector, wherein the channels are purposefully different...
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8111895 |
Locally adaptive image enhancement for digital subtraction X-ray imaging
A system and method provide local image enhancement. Internal native images of a patient may be acquired during an interventional procedure. A portion of the native images may show an...
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8111803 |
Method for energy sensitive computed tomography using checkerboard filtering
Methods for energy-sensitive computed tomography systems that use checkerboard filtering. A method of enhancing image analysis of projection data acquired using a detector configured with a...
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8068578 |
Method for recognizing and marking contrast agents in blood vessels of the lung with the aid of a CT examination and an image evaluation unit of a CT system
A method and an image evaluation unit are disclosed for recognizing and marking contrast agents in blood vessels of the lung with the aid of a CT examination using at least two different x-ray...
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8068133 |
Image processing apparatus and image processing method
An image processing apparatus includes a first spectrum estimating unit for reading the image information from a storage unit and estimating a spectrum of an object based on the read image...
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8055050 |
Motion compensation in energy-sensitive computed tomography
An imaging system includes an energy resolving detector (20) which generates data indicative of detected radiation having at least first and second energies. The system also includes an energy...
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8050385 |
Event sharing restoration for photon counting detectors
Photon counting detectors may suffer from pulse sharing effects and fluorescence photon generation, which may lead to a degradation of the measured signals. According to an exemplary embodiment of...
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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...
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8009793 |
Method for imaging plaque using dual energy CT
Two x-ray CT images are acquired of arterial plaque using x-rays at two different energy levels. The reconstructed images are normalized by adjusting pixel brightness until pixels depicting a...
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8000434 |
Energy spectrum reconstruction
A computed tomography system includes an x-ray source (108) that rotates about and emits radiation through an imaging region (116). At least one finite energy resolution detector (112) detects the...
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7995702 |
System and method of data interpolation in fast kVp switching dual energy CT
A CT system includes a rotatable gantry having an opening for receiving an object to be scanned, an x-ray source coupled to the gantry and configured to project x-rays through the opening, a...
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7983382 |
System and method for material segmentation utilizing computed tomography scans
Certain embodiments provide a radiation analysis system for material segmentation utilizing computed tomography (CT) scans. The radiation analysis system includes an input module configured to...
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7970096 |
Method of and system for low cost implementation of dual energy CT imaging
The disclosed CT scanner comprises at least one source of X-rays; a detector array comprising a plurality of detectors; and an X-ray filter mask arrangement disposed between the source of X-rays...
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7961838 |
Computerized tomography image reconstruction
Systems and methods include coordinated (KV) and megaelectronvolt (MV) computerized tomography (CT) imaging. KV and MV data are combined using a normalization process in order to generate CT...
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7949088 |
X-ray CT apparatus and method for processing X-ray projection data
An X-ray CT apparatus includes an X-ray irradiation unit for applying X-rays based on a first X-ray tube voltage and X-rays based on a second X-ray tube voltage to a subject by being switched every...
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7940887 |
Radiographic apparatus
An X-ray tube and a flat panel X-ray detector (FPD) are constructed movable parallel to each other in the same direction along a body axis which is a longitudinal direction of a patient. The X-ray...
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7940893 |
Method for distinguishing between four materials in tomographic records of a dual-energy CT system
A method and a CT system are disclosed having a computation unit for distinguishing between four materials (M1, M2, M3, M4) in tomographic records of a dual-energy CT system, wherein the size of a...
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7928400 |
X-ray detection system for wavelength dispersive and energy dispersive spectroscopy and electron beam applications
A detection system for wavelength-dispersive and energy-dispersive spectrometry comprises an X-ray detector formed from a solid-state avalanche photodiode with a thin entrance window electrode that...
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7924968 |
Imaging system for imaging a region of interest from energy-dependent projection data
The invention relates to an imaging system for imaging a region of interest from energy-dependent projection data, wherein the imaging system comprises a projection data providing unit (1, 2, 3, 6,...
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7924969 |
X ray CT system
The dual energy X-ray CT apparatus automatically optimizes a map for separation to achieve a high degree of separation accuracy and a reduction of dose. An X-ray attenuation coefficient acquired in...
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7924970 |
Method and device for generating a CT image with a high time resolution
A method and a device are disclosed for generating a CT image with a high time resolution using a computed tomography scanner which has at least two recording systems which are operated at...
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7920669 |
Methods, apparatuses and computer readable mediums for generating images based on multi-energy computed tomography data
Methods, apparatuses and computer readable mediums for generating a volume visualization image based on multi-energy computed tomography data are provided. In one method, an image is rendered based...
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7920735 |
Method and device for automatically differentiating bones or other calcium-containing materials and contrast agent in soft tissue
In at least one embodiment, two image data records of two computed tomography pictures of the object are provided that have been recorded in the context of a different spectral distribution of the...
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7894569 |
Medical X-ray examination apparatus for performing K-edge imaging
The invention relates to a medical X-ray examination apparatus (1) for performing K-edge imaging. The medical X-ray examination apparatus (1) comprises an imaging unit (21), which is configured to...
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7894576 |
Spectral computed tomography using correlated photon number and energy measurements
A computed tomography system includes a plurality of radiation sensitive detector elements (100) which generate a time varying signal indicative of x-ray photons received by the various detector...
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7894568 |
Energy distribution reconstruction in CT
The reconstruction of the energy distribution at a detector with a detector element that consists of many small pixels, which count the number of photons above certain thresholds, is performed with...
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7889834 |
Method for preparing reconstructed CT image data records and CT system
A method and CT system are disclosed for preparing reconstructed CT image data records. In at least one embodiment of the method, an initial material distribution of an examination object is...
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7885372 |
System and method for energy sensitive computed tomography
An energy-sensitive computed tomography system is provided. The energy-sensitive computed tomography system includes an X-ray source configured to emit an X-ray beam resulting from electrons...
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7885373 |
System and method for quantitative imaging of chemical composition to decompose multiple materials
The present invention provides a material decomposition method capable of determining the distribution of density and constituent material concentration throughout an imaged object. The...
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7881424 |
Method for calibrating dual-energy CT system and method of image reconstruction
A method for calibrating a dual-energy CT system and an image reconstruction method are disclosed to calculate images of atomic number and density of a scanned object as well as its attenuation...
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7876874 |
Radiographing apparatus and image processing program
A radiographing apparatus according to an aspect of the present invention is characterized in that an image processing device comprises an acquisition device which acquires projection data of a...
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7873141 |
X-ray tomographic imaging apparatus
For the purpose of providing an X-ray tomographic imaging apparatus for displaying a dual-energy image to facilitate diagnosis by an operator, an X-ray tomographic imaging apparatus (10) comprises:...
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7869560 |
X-ray CT apparatus and image processing apparatus
An X-ray CT apparatus includes an X-ray radiation unit which applies a first X-ray having a first energy spectrum and a second X-ray having a second energy spectrum different from the first energy...
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7869559 |
X-ray detector methods and apparatus
A method includes performing an x-ray focal spot deflection to generate two complete projections from two different channels of an x-ray detector, wherein the channels are purposefully different...
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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,...
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7839971 |
System and method for inspecting containers for target material
A method for automatically inspecting a container for a target material using a computed tomography (CT) scanning system includes performing an initial radiographic scan of the container. Based at...
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7826585 |
Stereo tube computed tomography
A computed tomography system includes at least two x-ray sources (108), a at least one common detector (124), and a reconstruction system (136). The at least two x-ray sources (108) are aligned at...
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7822169 |
Noise reduction in dual-energy X-ray imaging
It is described a method for reducing noise of X-ray attenuation data related to a first and second spectral X-ray data acquisition. The method comprises the steps of (a) acquiring data...
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7807981 |
Data processing device, tomography apparatus for examination of an object of interest, method of examining an object of interest, computer-readable medium and program element
A data processing device, comprising a plurality of emitter antennas arranged on a movable data acquisition device and adapted to emit electromagnetic radiation including data acquired by the...
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7801264 |
Method for calibrating a dual -spectral computed tomography (CT) system
A method for calibrating and reconstructing material density images in a dual-spectral computed tomography (CT) system 100 is disclosed. An X-ray source in the CT system 100 emits a first X-ray...
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7801265 |
System and method for creating mixed image from dual-energy CT data
A system and method for creating a combined or mixed-energy image using both low- and high-energy CT data sets acquired using a dual-energy CT system. The low- and high-energy datasets are mixed...
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7778380 |
Data handling and analysis in computed tomography with multiple energy windows
An apparatus includes a computed tomography (CT) scanner (10), a reconstructor (46), a polychromatic corrector (50), a material classifier (54) and an image processor (60). The scanner provides...
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7778382 |
CT imaging system with multiple peak x-ray source
An x-ray source (32) for performing energy discrimination within an imaging system (10) includes a cathode-emitting device (82) for emitting electrons and an anode (81) that has a target (80)...
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7778383 |
Effective dual-energy x-ray attenuation measurement
It is described a method and a CT system for measuring dual-energy X- ray attenuation data of an object. The CT system comprises a rotatable holder, an X-ray source comprising two different X-ray...
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7756239 |
Diagnostic imaging two non K-edge basis materials plus N K-edge contrast agents
A diagnostic imaging system in an example comprises a high frequency electromagnetic energy source, a detector, a data acquisition system (DAS), and a computer. The high frequency electromagnetic...
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7756240 |
X-ray computed tomography apparatus
The present invention provides an X-ray CT apparatus capable of improving image quality of a dual energy image. The X-ray CT apparatus comprises an X-ray tube for applying X rays having a first...
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