Patent application number | Description | Published |
20100104161 | PROJECTION SYSTEM FOR PRODUCING ATTENUATION COMPONENTS - The invention relates to a projection system for producing attenuation components of projection data of a region of interest. The projection system comprises a projection data providing unit ( | 04-29-2010 |
20100232669 | 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. The method comprises (a) estimating the thickness and the material composition of the object at a plurality of different projection angles, (b) for each of the various projection angles calculating for a variety of combinations of different first and second X-ray energies a corresponding common signal-to-noise ratio, (c) for each of the various projection angles choosing the first and the second X-ray energy causing the maximum corresponding common signal-to-noise ratio, and (d) for each of the various projection angles acquiring X-ray attenuation data of the object whereby the two X-ray energies are the X-ray energies causing a maximum signal-to-noise ratio assigned to the respective projection angle. | 09-16-2010 |
20100270472 | DIGITAL PULSE PROCESSING FOR MULTI-SPECTRAL PHOTON COUNTING READOUT CIRCUITS - An apparatus includes a local minimum identifier ( | 10-28-2010 |
20110012014 | SPECTRAL DETECTOR CALIBRATION - A method includes detecting radiation that traverses a material having a known spectral characteristic with a radiation sensitive detector pixel that outputs a signal indicative of the detected radiation and determining a mapping between the output signal and the spectral characteristic. The method further includes determining an energy of a photon detected by the radiation sensitive detector pixel based on a corresponding output of the radiation sensitive detector pixel and the mapping. | 01-20-2011 |
20110096892 | SPECTRAL CT - An imaging system includes a radiation source ( | 04-28-2011 |
20110096905 | K-EDGE IMAGING - An imaging system including a radiation source ( | 04-28-2011 |
20110216878 | SPECTRAL IMAGING - A spectral processor ( | 09-08-2011 |
20120008747 | DIFFERENTIAL PHASE-CONTRAST IMAGING WITH CIRCULAR GRATINGS - The invention relates to an X-ray differential phase-contrast imaging system which has three circular gratings. The circular gratings are aligned with the optical axis of the radiation beam and a phase stepping is performed along the optical axis with the focal spot, the phase grating and/or the absorber grating. The signal measured is the phase-gradient in radial direction away from the optical axis. | 01-12-2012 |
20120020461 | ACHROMATIC PHASE-CONTRAST IMAGING - An achromatic phase-contrast imaging apparatus for examining an object of interest is provided which comprises two different phase gratings which have different pitches. Thus, the imaging apparatus yields phase-contrast information for two different energies. Thus, phase-information over a wider energy band can be used. | 01-26-2012 |
20120057676 | GRATING FOR PHASE-CONTRAST IMAGING - The invention relates to gratings for X-ray differential phase-contrast imaging, a focus detector arrangement and X-ray system for generating phase-contrast images of an object and a method of phase-contrast imaging for examining an object of interest. In order to provide gratings with a high aspect ratio but low costs, a grating for X-ray differential phase-contrast imaging is proposed, comprising a first sub-grating ( | 03-08-2012 |
20120057677 | TILTED GRATINGS AND METHOD FOR PRODUCTION OF TILTED GRATINGS - The present invention relates to phase-contrast imaging which visualizes the phase information of coherent radiation passing a scanned object. Focused gratings are used which reduce the creation of trapezoid profile in a projection with a particular angle to the optical axis. A laser supported method is used in combination with a dedicating etching process for creating such focused grating structures. | 03-08-2012 |
20120243658 | PHASE CONTRAST IMAGING - X-ray devices for Phase Contrast Imaging (PCI) are often built up with the help of gratings. For large field-of-views (FOV), production cost and complexity of these gratings could increase significantly as they need to have a focused geometry. Instead of a pure PCI with a large FOV, this invention suggests to combine a traditional absorption X-ray-imaging system with large-FOV with an insertable low-cost PCI system with small-FOV, The invention supports the user to direct the PCI system with reduced FOV to a region that he regards as most interesting for performing a PCI scan thus eliminating X-ray dose exposure for scanning regions not interesting for a radiologist. The PCI scan may be generated on the basis of local tomography. | 09-27-2012 |
20120250821 | COMPUTED TOMOGRAPHY APPARATUS - The invention relates to a computed tomography apparatus for imaging an object. The computed tomography apparatus comprises a radiation source ( | 10-04-2012 |
20120250823 | CALIBRATION OF DIFFERENTIAL PHASE-CONTRAST IMAGING SYSTEMS - The present invention relates to an X-ray imaging system and a method for differential phase—contrast imaging of an object. To improve calibration of differential phase—contrast imaging systems and the alignment of the gratings an X-ray imaging system is provided that comprises an X-ray emitting arrangement providing at least partially coherent X-ray radiation and an X-ray detection arrangement comprising a phase-shift diffraction grating, a phase analyzer grating, and an X-ray image detector, all arranged along an optical axis. For stepping, the gratings and/or the X-ray emitting arrangement are provided with at least two actuators arranged opposite to each other with reference to the optical axis. For calibration, calibration projections are acquired without an object, wherein, the emitted X-ray radiation or one of the gratings is stepwise displaced with a calibration displacement value. For examination, measurement projections are acquired with an object, wherein the emitted X-ray radiation or one of the gratings is stepwise displaced with a measurement, a calibration projection is associated to each of the measurement projections by registering the latter with the calibration projections. | 10-04-2012 |
20120307966 | APPARATUS FOR PHASE-CONTRAST IMAGING COMPRISING A DISPLACEABLE X-RAY DETECTOR ELEMENT AND METHOD - The present invention relates to X-ray image acquisition technology in general. Employing phase-contrast imaging for X-ray image acquisition may significantly enhance the quality and information content of images acquired. However, phase-contrast information may only be obtainable in a small detector region, possibly being too small for a sufficient field of rotation view for specialized X-ray imaging applications. Accordingly, an apparatus for phase-contrast imaging is provided that may allow the acquisition of an enlarged field of view. According to the present invention an apparatus ( | 12-06-2012 |
20130251104 | BREAST DENSITY ASSESSMENT - The present invention relates to mammography. To provide breast density assessment with improved accuracy in the results, a method ( | 09-26-2013 |
20130287279 | DUAL-ENERGY TOMOGRAPHIC IMAGING SYSTEM - The invention relates to an imaging system ( | 10-31-2013 |
20130308847 | SPECTRAL IMAGING - A method includes analyzing a spectral projection image of a portion of a subject, generating a value quantifying an amount of a target specific contrast material in a region of interest of the spectral projection image, and generating a signal indicative of a presence of the target in response to the value satisfying a predetermined threshold level. | 11-21-2013 |
20140005971 | LIKELIHOOD-BASED SPECTRAL DATA PROJECTION DOMAIN DE-NOISING | 01-02-2014 |
20140112565 | IMAGING APPARATUS - The invention relates to an imaging apparatus ( | 04-24-2014 |
20140169653 | FREQUENCY DEPENDENT COMBINATION OF X-RAY IMAGES OF DIFFERENT MODALITIES - The present invention relates to X-ray imaging technology. In phase-contrast imaging, different types of image information, e.g. absorption image information and differential phase-contrast image information, may be obtained by a single image acquisition process. Individual types of image information comprise different image properties. The present invention relates to a frequency dependent combination of different types of image information to obtain a combined image having improved properties over the individual image information and their respective image information type. Accordingly, an apparatus ( | 06-19-2014 |
20140183371 | PHOTON COUNTING DETECTOR - A detector array includes at least one direct conversion detector pixel ( | 07-03-2014 |