Patent application number | Description | Published |
20120294501 | Method for providing a 3D image data record with suppressed aliasing artifacts overlapping the field of view and computed tomograph - A method is provided for providing a 3D image data record relating to a biological object with suppressed aliasing artifacts overlapping the field of view caused by an incomplete geometric capture of the object by a computed tomography. A first 3D image data record is provided to describe a subarea of the object. A second 3D image data record is obtained by the computed tomography including data relating to the subarea of the object and is registered with the first 3D image data record. Data of the second 3D image data record is extended and/or amended according to data of the first 3D image data record. A part of such data of the second 3D image data record can be assigned to an aliasing artifact overlapping the field of view and thus generates a modified second 3D image data record with suppressed aliasing artifacts overlapping the field of view. | 11-22-2012 |
20120294504 | METHOD FOR PROVIDING AN IMAGE DATA RECORD WITH SUPPRESSED ALIASING ARTIFACTS OVERLAPPING THE FIELD OF VIEW AND X-RAY IMAGE RECORDING APPARATUS - A method is disclosed. In at least one embodiment, the method includes obtaining an x-ray image data record with respect to the biological object by way of the x-ray image recording apparatus; obtaining a comparison image data record with respect to the biological object relating to a three-dimensional surface structure of the biological object; assigning data of the comparison image data record to data of the x-ray image data record by determining a predeterminable geometric assignment rule; and extending and/or amending data of the x-ray image data record as a function of data of the comparison image data record for at least one part of such data of the x-ray image data record, which can be assigned to an aliasing artifact overlapping the field of view. | 11-22-2012 |
20130188771 | METHOD FOR RECORDING AND DISPLAYING AT LEAST TWO 3D SUBTRACTION IMAGE DATA RECORDS AND C-ARM X-RAY APPARATUS - A method for recording at least two 3D subtraction image data records with a C-arm x-ray apparatus is provided. A mask run is implemented with a rotation angle of at least 180° plus fan angle plus an additional angle, while projection image data record of a native 3D image data record are recorded. A filler run is implemented after administration of a contrast agent with a rotation angle of at least 180° plus fan angle plus an additional angle. Partial 3D image data records are generated and formed into a set of projection image data records. Each set of projection image data records is reconstructed, wherein a 3D subtraction image data record is generated by subtracting data of a native 3D image data record from data of a 3D image data record after the administration of the contrast agent. | 07-25-2013 |
20130259355 | METHOD FOR DETERMINING AN ARTIFACT-REDUCED THREE-DIMENSIONAL IMAGE DATA SET AND X-RAY DEVICE - A method of determining an artifact-reduced three-dimensional reconstructed image data set includes a plurality of projection images of a primary data set, which show a head of a patient together with at least one neurosurgical apparatus generating artifacts in a three-dimensional reconstruction. The projection images of the primary data set are captured using different projection directions by an X-ray device having a C-arm. With regard to a reduction of artifacts, a projection image based correction is based upon projection images of a mask data set which show the neurosurgical apparatus without the head of the patient or the head of the patient without the neurosurgical apparatus. | 10-03-2013 |
20130261445 | REPRESENTATION OF BLOOD VESSELS AND TISSUE IN THE HEART - A method for representation of blood vessels and/or tissue in a heart of a human or animal body is described, with an imaging method and an assignment method, which allows the assignment to a heart phase of time-resolved images acquired with the imaging method. A mask series with a series of temporally-resolved first images of the heart is acquired, wherein the first images are assigned to a heart phase by the assignment method. A filling series with a series of temporally-resolved second images of the heart is acquired, wherein the second images are assigned to a heart phase by the assignment method. The first and second images assigned to the same heart phase are computed for creating a series of phase-selective subtraction images. The phase-selective subtraction images and/or the second images are computed, taking into account the heart movement for creating temporally and/or spatially-resolved perfusion data of the heart. | 10-03-2013 |
20130336450 | METHOD FOR RECORDING A FOUR-DIMENSIONAL ANGIOGRAPHY DATA RECORD - A method for recording a four-dimensional angiography data record using an x-ray facility with a C-arm is proposed. Projection images are recorded from different projection directions at different time points of the cardiac cycle. A number of three-dimensional reconstruction image data records assigned respectively to a time segment of the cardiac cycle are reconstructed from the projection images and combined to form the four-dimensional angiography data record by temporal assignment in respect of the cardiac cycle. At least one recording parameter describing the temporal sequence is selected when recording the projection images as a function of cardiac stimulation performed to ensure a stable heart rate during recording so that the recording of the projection images takes place in such a manner that it is synchronized with the cardiac cycle. | 12-19-2013 |
20140064593 | METHOD FOR GENERATING A SOLID MODEL OF A HEART AND ASSOCIATED C-ARM X-RAY EQUIPMENT - A method for generating a solid model of a heart in a predetermined phase of its periodic pumping movement is proposed. During a single C-arm rotation of a C-arm X-ray unit an electrocardiogram signal with consecutive RR intervals is observed by an EKG trigger. In each RR interval a digital X-ray image is generated by EKG triggering of the C-arm X-ray unit as soon as a time difference between the current phase and the predetermined phase is less than a predetermined value. For each of the X-ray images in addition a parameter influencing the geometry of the C-arm X-ray unit is ascertained. The solid model is generated from several of the X-ray images. At least one X-ray image is selected from each RR interval and for each of the selected X-ray images a projection data set for the calculation of the solid model is ascertained by the ascertained parameter. | 03-06-2014 |
20140081131 | ANGIOGRAPHIC EXAMINATION METHOD - A method is provided for angiographic examination of an organ, vascular system or other body regions as the examination object of a patient by means of 4D rotational angiography. A step S1 of the method involves acquisition of projection images in different cardiac phases. A further step S2 involves reconstruction of 3D volume images in the different cardiac phases. A further step S3 involves calculation of a motion map. A further step S4 includes image combination of the 3D volume images with the motion map to produce resulting, corrected 3D volume images in the different cardiac phases. A further step S5 involves presentation of the resulting, corrected 3D volume images. | 03-20-2014 |
20150078507 | Reducing Artifacts in an Image Data Set and X-Ray Device - Streak artifacts generated by at least one X-ray attenuating object arranged outside a reconstruction volume in a three-dimensional image data set showing the reconstruction volume are reduced. The reconstruction volume is reconstructed from two-dimensional projection images recorded from different projection directions. The object is localized in the projection images showing the object. To determine corrected projection images for the reconstruction of the image data set, the image data of the area of each projection image showing the object is corrected to remove the object. The localization of the object is performed taking into account difference images of the measured projection images and from a reconstruction data set of forward-projected comparative images reconstructed from the measured projection images. | 03-19-2015 |