Abstract: An X-ray detector comprises an array of pixels, each comprising a sensitive area, a body structure, and an electric circuitry. The sensitive areas are attached to, and arranged on, the body structure. The electric circuitry controls and reads out the sensitive areas and connects the sensitive areas with a processing unit. The sensitive areas provide an electric signal representing X-rays hitting the pixel. All pixels are provided in a pixel layout with a pixel layout scheme where the sensitive area is a first part of the pixel's surface that is contributing to the pixel's signal and a second part of the pixel's surface is irrelevant to contributing to the pixel's signal. To facilitate avoiding visual artifacts, the sensitive areas in a pattern in which at least a part of the pixels having the same pixel layout scheme such that the pixel layout of adjacent pixels is arranged differently.

Abstract: A method and system for processing a radiography image derived from an X-ray radiation passing through an object. The method includes acts of estimating, based on the radiography image, a scatter signal present in said radiography image; calculating, based on the estimated scatter signal, a scatter removal signal indicative of a scattered radiation removable from the X-ray radiation passing through the object by a reference anti-scatter device; and correcting the radiography image based on the scatter removal signal.

Abstract: The present invention relates to a system (1) for controlling an X-ray detector (11) for detection of X-ray radiation, an X-ray imaging arrangement (3) comprising such system (1) and a method for controlling an X-ray detector (11) for detection of X-ray radiation. The system (1) for detection of X-ray radiation comprises a trigger device (12). The trigger device (12) is configured to be arranged remotely from the X-ray detector (11). The trigger device (12) is furthermore configured to be data-linked to the X-ray detector (11). The trigger device (12) is configured to determine a start of an X-ray exposure of an X-ray tube (2), to generate an activation signal and to communicate such signal the X-ray detector (11) to activate image detection.

Abstract: An image processor and method for processing a sub-image (100a) specified within a global image (100). The processor (DZC) and the method yield a modified sub-image (100m) with spatial frequencies of large scale structures suppressed or removed and the modified sub-image is adapted to the dynamic grey value range of a screen (110) on which said modified sub-image (100m) is to be displayed.

Abstract: In phase-contrast imaging, different types of image information, such as absorption image information and differential phase-contrast image information, may be obtained by a single image acquisition process and have different image properties. A frequency dependent combination of different types of image information is obtained, the combined image having improved properties over the image information and respective image information types. Accordingly, an apparatus and a method for image processing in X-ray imaging of an object is provided, including receiving first and second image information of the object of first and second image information types, respectively, where the second image information type is different from the first image information type. The first and second image information is combined to obtain combined image information of the object, where the combined image information is frequency-dependent, depending on spatial frequencies of the first and second image information, respectively.

Abstract: A method for processing X-ray image data comprises: receiving sum image data (28) and difference image data (30), wherein the sum image data (28) and the difference image data (30) comprise intensity information of X-rays (18) of two different energies passing through an object (20), the sum image data (28) is based on a sum intensity of the two different energies and the difference image data (30) is based on a difference intensity of the two different energies; partitioning the difference image data (30) into a low frequency range (32) and a high frequency range (34); and generating low noise image data (36) by replacing the high frequency range (32) of the difference image (30) with a high frequency range based on the sum image data (28).

Abstract: A device 16 for displaying X-ray images, the device comprises a display 20 for displaying an X-ray image, a workstation 22 for processing image data and a user interface 24 for receiving commands from a user of the device. The user interface 24 is adapted for allowing the user to select a master image 34a and a slave image 34b from a plurality of images. The workstation 22 is adapted for transforming the slave image 34b by generating a color transformation 40 based on the master image 34a and the slave image 34b for optically adapting the slave image to the master image and by applying the color transformation 40 to the slave image 34b. The display 20 is adapted for displaying the transformed slave image 42.

Abstract: The present invention relates to lung measurement. In order to provide enhanced information about a patient that facilitates further assessment steps, 2D X-ray image data of a patient's chest is provided, and the image data is segmented to identify lung structures to provide segmented image data separated from un-segmented areas. Further, spatial lung volume information is extracted from the image data using the segmented image data derived from the image data. Still further, lungs symmetry information is determined using the extracted spatial lung volume information. Finally, the lungs symmetry information is provided to a user. For example, a 2D X-ray image data of a patient's chest is provided (84) and a lungs mask image is formed (86) after the step of segmenting the input image data. Then, the lungs mask image is used to define areas, within which a predetermined adaptation is applied (88) to the original 2D X-ray image data producing a thorax mask image.

Abstract: X-ray apparatus, with a collimator arrangement (12a, 18, 28a) positioned between the focus point (12b) and the detector (28b), mechanics (43) for enabling motion of the collimator arrangement, the detector and the x-ray source along a scan trajectory (30) in a x-z plane (83) and also along curved scan trajectory (45), which partly extents along a y-axis (35) perpendicular to the x-z plane. By using this invention better tissue coverage of objects with curved edges can be obtained.

Abstract: The present invention relates to X-ray imaging technology as well as image post-processing. Particularly, the present invention relates to a method for computer aided detection of structures in X-ray images as well as an X-ray system. A computer aided detection algorithm visibly determines tissue structures in X-ray image information and subsequently matches the shape of a determined tissue structure with a library of known tissue structures for characterizing the type of determined tissue structure. The determination of a tissue structure and thus the characterization of the type of the tissue structure may be enhanced when employing also spectral information, in particular energy information of the acquired X-ray image.

Abstract: An X-ray apparatus for image acquisition and a related method. The apparatus comprises a field-of-view corrector (CS) configured to receive a scout image (SI) acquired by the imager with a tentative collimator setting in a pre-shot imaging phase where said imager operates with a low dosage radiation cone causing the detector to register the scout image. The low dosage cone has, in the detector's image plane, a first cross section smaller than the total area of the detector surface. The field-of-view corrector (CS) uses said scout image to establish field-of-view correction information for a subsequent imaging phase where the imager is to operate with a high dosage radiation cone, the high dosage higher than the low dosage.

Abstract: A method (100) for processing a radiography image derived from an X-ray radiation passing through an object, and a radiography system (202) for performing such method. The method (100) comprises a step (104) of estimating, based on the radiography image, a scatter signal present in said radiography image; a step (106) of calculating, based on the estimated scatter signal, a scatter removal signal indicative of a scattered radiation removable from the X-ray radiation passing through the object by a reference anti-scatter device; and a step (110) of correcting the radiography image based on the scatter removal signal.

Abstract: The present invention relates to mammography.

Abstract: An image processor and method for processing a sub-image (100a) specified within a global image (100). The processor (DZC) and the method yield a modified sub-image (100m) with spatial frequencies of large scale structures suppressed or removed and the modified sub-image is adapted to the dynamic grey value range of a screen (110) on which said modified sub-image (100m) is to be displayed.

Abstract: The present invention relates to an X-ray detector and the pixel layout. In order to provide a facilitated way of avoiding artifacts in images provided by X-ray detectors, an X-ray detector (10) is provided, comprising a pixel array (12) with a plurality of pixels (14), each of which comprises a sensitive area (16), a body structure (18),and an electric circuitry (20). The sensitive areas are attached to the body structure and the electric circuitry is provided to control and read out the sensitive areas and to connect the sensitive areas with a processing unit. The sensitive areas are configured to provide an electric signal representing X-ray radiation hitting the pixel. All pixels are provided in a pixel layout with a pixel layout scheme (22) where the sensitive area is a first part (24) of the pixel's surface that is contributing to the pixel's signal and a second part (26) of the pixel's surface is irrelevant to contributing to the pixel's signal.

Abstract: A device 16 for displaying X-ray images, the device comprises a display 20 for displaying an X-ray image, a workstation 22 for processing image data and a user interface 24 for receiving commands from a user of the device. The user interface 24 is adapted for allowing the user to select a master image 34a and a slave image 34b from a plurality of images. The workstation 22 is adapted for transforming the slave image 34b by generating a color transformation 40 based on the master image 34a and the slave image 34b for optically adapting the slave image to the master image and by applying the color transformation 40 to the slave image 34b. The display 20 is adapted for displaying the transformed slave image 42.

Abstract: The present invention relates to mammography. In particular, the present invention relates to a method and a corresponding system for individually monitoring a compression force in an apparatus for mammographic examination for personalized compression guidance. In order to provide a personalized guidance for the compression of the breast in a first step (S1a, S1b, S1c) a breast contact area (A) between a breast under examination and a compression plate (3) or a support plate (15) is determined. In a next step (S5) a compression force limit is determined based on the breast contact area (A). Then, in a further step (S9a, S9b, S9c) an output signal (5) representative of the relation between the breast contact area (A) and the compression force limit is provided to a user such that the user may decide whether to complete or to continue the application of compression force.

Abstract: 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 (56) as well as a method (100) for image processing in X-ray imaging of an object is provided comprising receiving (102) first image information of the object of a first image information type, receiving (104) second image information of the object of a second image information type,wherein the second image information type is different from the first image information type.

Abstract: It is described a portable X-ray system (200), which has sensing means for detecting whether an anti scatter grid (230) is attached to a portable detector (240) or not. The system is able to automatically change the default exposure settings (265 a, 265b, 265 c, 265 d), when a grid (230) is removed or attached to the portable detector (240). Thus, the risk of an under- or an over-exposure of the image will be reduced.

Abstract: The present invention relates to mammography.