Abstract: A medical imaging system includes a magnetic resonance imaging unit including a magnet unit and a patient receiving area surrounded by the magnet unit, wherein the magnet unit includes a main magnet, a gradient coil unit and a radio-frequency antenna unit. In at least one embodiment, the medical imaging system further includes a positron emission tomography unit including at least two positron emission tomography detector modules. The at least two positron emission tomography detector modules each include a detector surface. Further, the radio-frequency antenna unit is disposed outside an area disposed between an examination area and the detector surfaces.

Abstract: A method, medical imaging device and computer program product are disclosed for creating a detailed attenuation value map for a limited body region of a patient for a positron emission tomography examination. In an embodiment, the method includes an acquisition of first attenuation value data from a first attenuation value measurement of the limited body region; an ascertainment of at least one mean attenuation value based upon the first attenuation value data for the limited body region; an acquisition of second attenuation value data from a second attenuation value measurement of the limited body region; an ascertainment of local correction values based upon the second attenuation value data for the limited body region; and a determination of the detailed attenuation value map for the limited body region based upon the at least one mean attenuation value and based upon the local correction values.

Abstract: A method is disclosed for imaging a part region of an examination object in a magnetic resonance system. In an embodiment, a first and second gradient field are respectively created such that, at a respective first and second position at the edge of the field of view, a distortion caused by a non-linearity of the respective first and second gradient field, and a distortion caused by a B0 field inhomogeneity, cancel each other out. By way of the respective first and second gradient, respective first and second magnetic resonance data which contains the respective first and second position are acquired. A first and second respective readout direction, in which the respective first and second magnetic resonance data are acquired, are selected as a function of a location of the respective first second position are acquired. From the magnetic resonance data, an image of the part region is defined.

Abstract: A method, a computer program product and a computer-readable storage medium are disclosed for displaying signal values of a combined magnetic resonance positron emission tomography device. In at least one embodiment, the spatial correspondence of signal values, which result from a magnetic resonance measurement, and of signal values, which result from a positron emission tomography measurement, are used and the corresponding signal values are arranged in matrix form and displayed graphically as a multi-dimensional scatter plot.

Abstract: A method is disclosed for generating a motion-corrected PET image of an examination area in a combined MR-PET system. In an embodiment, the method includes recording PET events from the examination area in a first recording time frame; recording a number of MR images of the examination area in at least the first recording time frame; calculating an at least two-dimensional movement information of the examination area on the basis of the number of MR images, wherein the movement information describes the movement information of the examination area during the first recording time frame, and determining the motion-corrected PET image from the PET events using the calculated movement information.

Abstract: A phantom, particularly for use in MR- or PET-based imaging methods, includes a hollow base body that delimits an interior volume, wherein the interior volume is subdivided into at least two volume portions by at least one separation element, and wherein the separation element or a section thereof consists of foam.

Abstract: A method is disclosed for imaging a portion of an examination object in a magnetic resonance scanner. The portion is arranged at the edge of a field of view of the magnetic resonance scanner. During at least one embodiment of the method, a gradient field is produced such that a nonlinearity in the gradient field and a B0-field inhomogeneity cancel at a predetermined point at the edge of the field of view. Magnetic resonance data, which contains the predetermined point at the edge of the field of view, is acquired with the aid of the gradient field. An image of the portion of the examination object at the predetermined point is determined from the magnetic resonance data.

Abstract: A method is disclosed for recording and evaluating PET data recorded at the same time as magnetic resonance data using a combined magnetic resonance/PET apparatus, wherein in the context of a pulse sequence for recording the magnetic resonance data a magnetic resonance recording facility, including at least one gradient coil and at least one high-frequency coil, is activated. In at least one embodiment, the method includes recording the PET data and assigning the recorded PET data after the recording time point to at least two data groups assigned to a predetermined operating state of the magnetic resonance recording facility; for each data group, determining a measure of similarity of the PET data contained therein to the PET data as a whole and/or to PET data of at least one further data group, whereby if the measure of similarity is below a threshold value, the PET data of the data group is rejected and/or further evaluated separately.

Abstract: A support unit is disclosed for positioning a patient within a medical imaging apparatus with at least one magnetic resonance device; along with a patient positioning apparatus and a medical imaging apparatus including such a support unit. In an embodiment, the support unit includes at least one bearing element for movable positioning relative to a patient positioning apparatus and a coil unit for receiving magnetic resonance raw data. The coil unit includes a flat supporting surface for positioning the patient.

Abstract: A method, a computer program product and a computer readable storage medium are disclosed for generating a global attenuation map used for attenuation correction of positron emission tomography image data sets in a combined magnetic resonance-positron emission tomography device. In an embodiment, during the course of detecting hardware components of the combined magnetic resonance-positron emission tomography device and determining positions of the detected hardware components relative to a patient support, the global attenuation map is generated as a function of the detected hardware components.

Abstract: An apparatus is disclosed for combined magnetic resonance tomography and positron emission tomography imaging which is designed for recording PET image data of a person under examination from an examination area. In at least one embodiment, the apparatus includes a scanning unit, embodied to scan a prespecified area of the person under examination and based on the scanning, to determine a contour of the person under examination for the prespecified area; and a processing unit, embodied, based on the contour determined, to carry out an absorption correction of PET data which has been recorded from the prespecified area of the person under examination. A method is also disclosed.

Abstract: A method and an system are disclosed for reconstructing an emission tomography image in a combined MR (magnetic resonance) and emission tomography imaging system. In at least one embodiment, the method includes obtaining an MR image of a subject, the subject being clipped in the MR image; obtaining raw emission tomography scan data of the subject; determining a missing part of the subject clipped in the MR image; using information of the MR image and the determined missing part to obtain a final attenuation model of the subject; and reconstructing the emission tomography image using the raw data and the final attenuation model.

Abstract: A patient positioning couch for a combined medical examination device is disclosed. In at least one embodiment, at least one opening is provided in a support plate of the patient positioning couch and the patient positioning couch includes at least one conveyor belt in order to move a patient on the support plate in the longitudinal direction.

Abstract: A method is disclosed for determining a location of a subarea of an area under examination in a magnetic resonance system. The subarea is arranged at the edge of a field-of-view of the magnetic resonance system. In at least one embodiment of the method, at least one slice position is determined for an MR image in which the B0 field at the edge of the MR image satisfies a homogeneity value. For the slice position determined an MR image is acquired which contains the subarea at the edge of the field-of-view and the location of the subarea of the object under examination is determined through the location of the subarea in the MR image.

Abstract: To carry out magnetic resonance (MR) tomography, a physiological parameter of an object to be examined is acquired as a function of time to detect a physiological cycle which repeats itself over time. First MR data is acquired for a first region, wherein all points of the first region are arranged in a region of a field of view of an MR system. Acquisition of the first MR data occurs selectively in first time intervals which are synchronized with the physiological cycle and are separated from each other by waiting intervals. Second MR data is acquired for a second region which adjoins the first region. Acquisition of the second MR data occurs in the waiting intervals between the first time intervals.

Abstract: In one embodiment, an electromagnetic shielding of a device is disclosed for a magnetic resonance system. The device is shielded via a conductive layer which surrounds an inner part of the device in such a manner that an electrical current path completely around the inner part can be formed in the layer. The layer is arranged between a housing of the device, surrounding the inner part, and the inner part. In another embodiment, an electromagnetic shielding of a device is disclosed for a magnetic resonance system, wherein the device is shielded via a conductive layer which surrounds the device in such a manner that an electrical current path completely around the device is formed. In this situation, the device having the layer is mounted by way of projections on the magnetic resonance system. Each projection has a contact surface with the layer, at which the respective projection contacts the layer.

Abstract: A method is disclosed for determining radiation attenuation as a result of an object in a positron emission tomography scanner. In at least one embodiment, a phantom object is arranged in the positron emission tomography scanner during the method. First raw radiation data of the phantom object is acquired while the object is not arranged in the positron emission tomography scanner. A first image of the phantom object is calculated from the first raw radiation data. The object then is arranged in the positron emission tomography scanner (2) and preliminary radiation attenuation of the object is identified. Second raw radiation data of the phantom object is acquired while the object is arranged in the positron emission tomography scanner. A second image of the phantom object is calculated from the second raw radiation data taking into account the preliminary radiation attenuation. The radiation attenuation is determined on the basis of the first image and the second image.

Abstract: A method and a transmission system are disclosed for the transmission of wanted signals between a sensor and an evaluation unit. In order to suppress interference to the sensor signals due to external interference sources as far as possible, at least one embodiment of the inventive system has at least one signal receiver with the sensor for detecting a wanted signal and a signal processing device for conditioning the wanted signal, at whose output a mixed signal with a wanted signal component and an interference signal component from at least one interference source are present; an interference source signal input for detecting at least one interference source signal of the at least one interference source; a filter device for reconstructing the interference signal component as a function of the at least one interference source signal; and a subtractor for eliminating interference superimposed on the wanted signal.

Abstract: An equipment object is provided for a combination imaging system and can be positioned in a measurement chamber. The equipment object includes a radionuclide imaging device and a magnetic resonance imaging device. In its peripheral region the equipment object further includes an image-critical function component which has an average radionuclide emission radiation attenuation value that reaches at least a specified attenuation limit value of 30% in relation to a first defined minimum cross-sectional area of 30 mm2, and/or wherein the equipment object is so configured that an average radionuclide emission radiation attenuation value relating to a second defined minimum cross-sectional area of 400 mm2 of the equipment object reaches at most a central attenuation limit value of 15% in an overall spatially central region of the equipment object.

Abstract: A method is disclosed for performing a combined magnetic resonance/positron emission tomography scan of an examination object in an MR/PET system. An embodiment of the method entails acquiring first magnetic resonance data using a first readout gradient field. The first readout gradient field is chosen such that, at a location of the field of view of the magnetic resonance system, a distortion caused by a nonlinearity of the first readout gradient field and a distortion caused by a B0 field inhomogeneity substantially cancel each other out. First magnetic resonance images for planning the combined magnetic resonance/positron emission tomography session and determining an attenuation correction map for a positron emission tomography scan are determined on the basis of the first magnetic resonance data. Positron emission data and second magnetic resonance data are acquired using a second readout gradient field.