Michael Grasruck
Michael Grasruck, Erlangen DE
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20080310582 | X-Ray System for the Creation of Diagnostic X-Ray Images Using Contrast Media - An x-ray system is disclosed including a selector for finding an optimum combination between the contrast medium and the energy spectrum of an x-radiation for a scan to optimize the noise-to-contrast ratio. A method for creating X-ray images is also provided. The x-ray images are created with the aid of contrast media by taking into account an optimal combination between the contrast medium and the energy spectrum of an X-radiation used for a scan. A method for the use of a lanthanide-containing complex to produce a contrast medium for optimizing the combination between the contrast medium and the radiation to obtain a maximum contrast-to-noise ratio in an X-ray image is also provided. | 12-18-2008 |
20090086882 | Method and computational unit for measuring the flow rate of a contrast agent in a vessel of a patient - A method and a computational unit are disclosed for measuring the flow rate of a contrast agent in a vessel of a patient by way of a computed tomography examination. The patient is scanned by x-rays emitted in a fan-shape from two planes and the absorption from a multiplicity of rotational angles is determined while the contrast agent propagates through the at least one vessel. According to at least one embodiment of the invention, a three-dimensional data record of local absorption data with the vessel which can be filled by a contrast agent is reconstructed; a set of x-rays which pass through this vessel is determined for a multiplicity of temporally subsequent rotational angles of the x-rays. By determining the changing absorption values along this vessel from the temporally subsequent vessel/ray-sets, the propagation velocity of the contrast agent in this vessel can be determined from the spatial and temporal change in the absorption values in this vessel. | 04-02-2009 |
20090324044 | Method for reconstructing CT image data - A method is disclosed for reconstructing CT image data. In at least one embodiment, the method includes provisioning CT projection data p. Secondly, it includes reconstruction of first image data f | 12-31-2009 |
20090324045 | Method of reconstructing CT image data - A method is disclosed for reconstructing CT image data. In at least one embodiment, the method includes providing measured CT projection data p based on the CT projection data p, reconstructing first CT image data f | 12-31-2009 |
20110038460 | DEVICE AND METHOD TO CONTROL AN ELECTRON BEAM FOR THE GENERATION OF X-RAY RADIATION, IN AN X-RAY TUBE - A device to control an electron beam for the generation of x-ray radiation, has an electron emitter to generate an electron beam, to which emitter an emitter voltage can be applied, a diaphragm, at least two control elements associated with the diaphragm to affect the electron beam, and switching arrangement with which at least two different electrical voltages can be applied to the at least two control elements. The same electrical voltage is applied to each of the at least two control elements. Upon switching the voltage, an electrical circuit that delays the setting of the respective voltage at the one control element is associated with the connection line of the one control element with the switching arrangement to switch over the voltage. The invention moreover concerns an operating method for the device and an x-ray tube provided with the device. | 02-17-2011 |
20120014500 | Method And Computed Tomography Scanner For Carrying Out An Angiographic Examination - A method and a computed tomography scanner are disclosed for carrying out an angiographic examination of a patient, wherein the utilized computed tomography scanner includes at least one recording system mounted on a gantry such that it can rotate about a z-axis. Projection data is acquired from at least one prescribed angular position of the gantry for at least two different energies of X-ray radiation. The projection data is subsequently combined to form a resulting projection image by evaluating the projection data corresponding to the respective angular position, in which projection image at least one substance, which should be displayed selectively, is imaged with a high image contrast compared to the respective individual projection data. This procedure extends the field of application of the computed tomography scanner to projection-based angiography examinations, which were previously restricted to C-arm systems. 3D image reconstruction methods and projection methods can be carried out on opposite sides and with great flexibility during an examination, without the need for an additional modality. By using a multispectral technique, it is possible to contrast agent. The projection data at dispense with recording a native projection data record without the different energies are moreover acquired with no or little time offset, and so a computationally expensive and error-prone registration of the data records can be dispensed with. | 01-19-2012 |
Michael Grasruck, Nuernberg DE
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20120069950 | METHOD AND X-RAY DEVICE FOR CREATING AN X-RAY PROJECTION IMAGE - A method and an X-ray device are disclosed for creating an X-ray projection image of a three-dimensional object under examination and for displaying the projection image. In at least one embodiment, pixel images are recorded from two different perspectives and a projection image is created by overlaying the two pixel images, wherein perspective-related offset of the mapping image pixels is taken into account, pixel-by-pixel, in relation to an imaging surface in the object under examination. | 03-22-2012 |
20120263272 | X-RAY IMAGING METHOD AND APPARATUS TO REDUCE X-RAY EXPOSURE OF SUBJECT REGIONS OTHER THAN THE DIAGNOSTICALLY RELEVANT SUBJECT REGION - In a method for operating an imaging apparatus, and an imaging apparatus that has an x-ray source with a focus and a measurement volume with a central axis around which measurement volume the focus can be moved, acquisition of x-ray projections of a measurement subject that is arranged eccentrically relative to the central axis in the measurement volume are produced. The segment of the measurement volume in which the measurement subject is arranged is established based on an overview image and the projection angle range Δα in which x-ray projections should only be acquired in order to be able to reconstruct at least one image of the measurement subject is determined based on the establishment of the segment of the measurement volume. | 10-18-2012 |
20130114791 | Imaging Method with a Radiotherapy Device and Radiotherapy Device - A method for imaging with a radiotherapy device is provided. The radiotherapy device includes a movably mounted imaging apparatus with an X-ray source and an oppositely disposed X-ray detector. The method includes preparing a first image with the imaging apparatus from a first imaging direction. The imaging apparatus is moved to a position that permits the preparation of a second image from a second imaging direction extending at an angle to the first imaging direction. The method also includes preparing the second image with the imaging apparatus from the second imaging direction, and verifying the position of an object to be irradiated using the first image and the second image. | 05-09-2013 |
Michael Grasruck, Nuremberg DE
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20130034212 | CONTRAST AGENT-ENHANCED IMAGING DURING RADIATION THERAPY - A method is disclosed for imaging within the scope of a radiation therapy. In at least one embodiment, the method includes preparing one or more contrast agent-enhanced x-ray image data records; and using the contrast agent-enhanced x-ray image data record during an irradiation planning and/or during an irradiation session. | 02-07-2013 |
20140005533 | METHOD FOR GENERATING A CONTRAST MEDIUM-ASSISTED X-RAY IMAGE AND X-RAY SYSTEM | 01-02-2014 |
20140126688 | X-RAY DETECTOR SYSTEM FOR A COMPUTED TOMOGRAPHY SCANNER AND COMPUTED TOMOGRAPHY DEVICE - For improved sampling, an x-ray detector system for a computed tomography scanner is provided. In an embodiment, the x-ray detector system includes at least one detector row which includes a plurality of detector modules each having a plurality of detector elements. Along the at least one detector row, a first portion of the detector elements is arranged in a grid at a first grid spacing in relation to its respective neighboring detector elements, and a second portion of the detector elements is arranged in a grid at a second grid spacing in relation to its respective neighboring detector elements. | 05-08-2014 |
Michael Grasruck, Nuemberg DE
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20130083901 | METHOD AND DEVICE FOR DETERMINING THE WEAR OF AN X-RAY ANODE - A method and a device for determining the wear of an X-ray anode having an anode plate are provided. The method includes determining a reference value for a parameter that characterizes a property influenced by the dependence of an angle between radiation generated by the X-ray anode and the anode plate. The method also includes determining a value for the parameter after a specific operating time. The wear is established by comparing the determined value for the parameter with the reference value and correlating a deviation of the determined value for the parameter from the reference value with a wear state of the X-ray anode. | 04-04-2013 |
Michael Grasruck, Nurnberg DE
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20160120487 | COUCH PANEL AND PATIENT COUCH FOR MEDICAL IMAGING METHODS - A couch panel for a patient couch for a medical imaging method is disclosed. The couch panel is of single-shell design, beads are formed in the longitudinal direction of the couch panel, wherein the number and the shape of the beads are chosen such that the couch panel has a predefinable geometric moment of inertia. The two longitudinally extending edges of the couch panel are bent upward. This is advantageous because of the cost-effective production of a couch panel and, in the case of X-ray imaging, in the low radiation absorption. A patient couch having a couch panel of this kind is likewise disclosed. | 05-05-2016 |