Abstract: A method and apparatus are provided to improve CT image acquisition using a displaced acquisition geometry. A CT apparatus may be used having a source (102) and a detector (104) transversely displaced from a center (114) of a field of view (118) during acquisition of the projection data. The amount of transverse displacement may be determined based on the size of the object (108). The source and the detector may be adjusted to vary the size of the transverse field of view. The first data set acquired by the detector may be reconstructed and used to simulate missing projection data that could not be acquired by the detector at each projection angle. The measured projection data and the simulated projection data may be used to obtain a second data set. The second data set may be compared to the first data set to produce a corrected data set.

Abstract: The present invention relates to an imaging apparatus for generating an image of a region of interest of an object. The imaging apparatus comprises a radiation source (2) for emitting radiation (4) and a detector (6) for measuring the radiation (4) after having traversed the region of interest and for generating measured detection values depending on the measured radiation (4). The imaging apparatus further comprises an attenuation element for attenuating the radiation (4) before traversing the region of interest and an attenuation element scatter values providing unit (12) for providing attenuation element scatter values, which depend on scattering of the radiation (4) caused by the attenuation element. A detection values correction unit (17) corrects the measured detection values based on the provided attenuation element scatter values, and a reconstruction unit (18) reconstructs an image of the region of interest from the corrected detection values.

Abstract: When performing image-guided biopsy of an anatomical structure in a patient, a target anatomical patient region containing biopsy target is imaged using both SPECT and XCT concurrently. 3D SPECT and XCT image data is fused to generate a fused 3D reference image (34) that is overlaid on 2D patient image(s) generated during the biopsy procedure to generate an overlay image. The overlay image also includes a planned path or trajectory for a biopsy instrument. The 2D patient images are generated using SPECT and/or XCT, and are updated periodically to show biopsy instrument position and progress.

Abstract: The present invention relates to an image generation device for generating an image from measured data, wherein image quality is optimized for a region of interest and to an imaging system comprising this image generation device. The image generation device comprises a noise determination unit for determining a distribution of noise in a projection domain of the region of interest, and a dose control unit (32) for determining a dose profile for a radiation source (2) of said image generation device based on said determined distribution of noise by using a noise propagation algorithm. Thereby, signal-to-noise ratio of a reconstructed volume can be improved and is not sensitively dependent on a selected region of interest.

Abstract: A method and apparatus of image reconstruction correcting for photon scatter is provided. A direct physical measurement of scattered photons is used in conjunction with a physical model of the photon scattering process to make the corrections.

Abstract: When generating a 3D image of a subject or patient, a cone beam X-ray source (20a, 20b) is mounted to a rotatable gantry (14) opposite an offset flat panel X-ray detector (22a, 22b). A wedge-shaped attenuation filter (24a, 24b) of suitable material (e.g., aluminum or the like) is adjustably positioned in the cone beam to selectively attenuate the beam as a function of the shape, size, and density of a volume of interest (18) through which X-rays pass in order to maintain X-ray intensity or gain at a relatively constant level within a range of acceptable levels.

Abstract: It is provided a method for imaging a dynamic process in a part of the body, especially blood perfusion, with an x-ray system as well as corresponding apparatuses and a corresponding computer readable medium. Especially it is described a method for imaging a dynamic process in a part of the body, especially blood perfusion, with an x-ray system, comprising: acquiring rotational projections of the part of the body over an angular range (2), deriving the anatomy of the part of the body subject to the dynamic process using a tomographic reconstruction from the projections (3), determining an optimal position of the x-ray system according to the derived anatomy for acquiring projections of the dynamic process (4), administering contrast agent to the part of the body (5), acquiring projections of the dynamic process from the determined position (6); calculating the dynamic contrast enhancement over time (7); and calculating and displaying perfusion parameters (8).

Abstract: A method, a computer program as well as a corresponding apparatus for eliminating scatter artefacts that corrupt an image of an object using computed tomography, wherein X-ray projections of the object are at least partially truncated, whereas the method comprises the steps of: reconstructing a truncated image of the object with a limited field of view from the projections; constructing a model of the object in an extended field of view using the truncated image of the object; deriving a scatter estimate by means of Monte-Carlo simulation using the model of object; correcting a projection of the object for X-ray scatter based on the scatter estimate; reconstructing a scatter-corrected image using the corrected projections.

Abstract: The present invention relates to a detection values correction apparatus for correcting detection values of a projection image of a multi-energy imaging system. A scatter contribution providing unit provides scatter contributions for different intensities, different energies and different locations on the detection surface of the detection values. A scatter contributions combining unit combines scatter contributions for correcting a detection value, wherein the combined scatter contributions represent the contribution of the scatter, which is caused by radiation of the other detection values of the projection image, to the detection value to be corrected and wherein the scatter contributions are combined under consideration of the intensity, energy and location on the detection surface of the other detection values. A correction unit scatter corrects the detection value of the projection image by using the combined scatter contributions.

Abstract: A method includes generating a plurality of scatter distributions based on geometric models having different object to detector distances, determining an imaged object to detector distance, and identifying a scatter distribution of the plurality of scatter distributions having a object to detector distance that corresponds to the imaged object to detector distance. The method also includes employing the identified scatter distribution to scatter correct projection data corresponding to the imaged object. Another method includes generating an estimate of wedge scatter by propagating a predetermined wedge scatter profile through an intermediate reconstruction of an object; and employing the estimate to wedge scatter correct the projection data.

Abstract: The present invention is directed to a freshness indicator (9) for a chilled beverage and in particular to a beverage dispensing device (1) with a freshness indicator (9) for a chilled beverage, wherein the beverage dispensing device (1) comprises an outer housing (7), a tapping device (2) for dispensing a beverage, a beverage container (4) being placeable in the outer housing (7) and connectable with the tapping device (2), and the outer housing (7) functioning as a chiller (8), characterized in that the beverage freshness indicator device (9) comprises: a display (10) for indicating the storage temperature, maximum storage period, actual freshness of the beverage, the time left until expiry of the freshness and/or the date of expiry of the freshness, a data input unit (11) for the input of data and/or means (12) for recording replacement of the beverage container (4), at least one temperature sensor (13) for measuring the storage temperature of the beverage, —a temperature controller (14) for adjusting the

Abstract: A method for generating a set of kernels for convolution error compensation of a projection image of a physical object recorded by an imaging system comprises calculating the set of kernels in such a way that for each pixel of the projection image an asymmetric scatter distribution for error compensation is calculated representing a X-ray scatter originating along a ray from an X-ray source to the pixel.

Abstract: The present invention relates to an image reconstruction device and a corresponding method for reconstructing a 3D image of an object (7) from projection data of said object (7).

Abstract: The present invention relates to an apparatus for iterative scatter correction of a data set of x-ray projections (10) of an object (1) for generation of a reconstruction image of said object.

Abstract: Adaptively controlling an imaging system (200, 205) includes constructing model feature characteristics (105) of a process over time, determining parameters and commands (110) for controlling the imaging system for each state of the process, performing data acquisition (120) for the process, extracting current features (130) of the process from the acquired data, matching (135) the current features (130) with the model feature characteristics (105) to determine a state of the process (140), and controlling the data acquisition based on the state of the process to produce optimized data.