Abstract: The disclosure is based on a magnetic resonance system comprising a magnetic resonance apparatus with a scanner unit having a main magnet, a gradient coil unit, and a radio-frequency coil unit; a patient receiving region at least partially surrounded by the scanner unit, and an elastography apparatus embodied to excite regions of interest of a patient during a magnetic resonance elastography examination on the patient, comprising a vibration unit, a magnetic resonance-compatible drive unit, and a transmission unit for transmitting a drive torque generated by the magnetic resonance-compatible drive unit to the vibration unit. The magnetic resonance-compatible drive unit has a magnetic resonance-compatible motor.

Abstract: A method for checking the functionality of an MR sensor within a local coil arrangement, the method including: acquiring at a first couch position a first measurement value from the magnetic field sensor outside the bore at the first measurement position of the local coil arrangement, and determining the first position information; acquiring at a second couch position a second measurement value from the magnetic field sensor during or after the conclusion of the couch's travel into the bore at a second measurement position of the local coil arrangement, which second measurement position differs from the first; determining a reference value, which specifies the expected main magnetic field at the second measurement position, determined from the first position information and the couch's displacement distance; and determining error information, which indicates a potential measurement error, by comparing the second measurement value with the reference value.

Abstract: A method for checking the functionality of an MR sensor within a local coil arrangement, the method including: acquiring at a first couch position a first measurement value from the magnetic field sensor outside the bore at the first measurement position of the local coil arrangement, and determining the first position information; acquiring at a second couch position a second measurement value from the magnetic field sensor during or after the conclusion of the couch's travel into the bore at a second measurement position of the local coil arrangement, which second measurement position differs from the first; determining a reference value, which specifies the expected main magnetic field at the second measurement position, determined from the first position information and the couch's displacement distance; and determining error information, which indicates a potential measurement error, by comparing the second measurement value with the reference value.

Abstract: A method for tracking the movement of an object region in an examination tunnel of a magnetic resonance tomography system. The method includes arranging a carrier unit around the object region, such that the position of the carrier unit is linked to the position of the object region, wherein at least one motion sensor is arranged on the carrier unit; defining a starting position of the object region; monitoring the movement acquired by the at least one motion sensor in order to obtain movement data; and determining a current position of the object region relative to the starting position based on the movement data acquired with the at least one motion sensor.

Abstract: In a method for acquiring a position of a region to be examined of an object for a medical imaging examination, a marker element is manually positioned at the region to be examined of the object, the position of the marker element is acquired by an acquisition apparatus, a feedback marking is projected at the acquired position of the marker element by a projection apparatus and based on a correction factor in the z-direction that is considered when ascertaining a projection position of the feedback marking, the acquisition of the position of the marker element and of the projection of the feedback marking is repeated until the feedback marking coincides with the position of the marker element, and the position of the marker element is defined as the position of the region to be examined of the object.

Abstract: The disclosure relates to a radio-based physiological acquisition system for an RF-shielded room comprising a peripheral acquisition unit with a peripheral transmitter, a peripheral control unit, and a door sensor unit. The door sensor unit is configured to determine an opening status of a door in an RF shield around the RF-shielded room. The peripheral acquisition unit is configured to switch off the peripheral transmitter depending on the opening status of the door, e.g. when the door is open.

Abstract: The disclosure describes a medical imaging apparatus comprising a couch on which an object can be positioned for a medical imaging examination, a first acquisition apparatus which is embodied for acquiring a position of a region to be examined of the object, a projection apparatus which is embodied for a projection and/or display of a feedback marking at the acquired position of the region to be examined, a linear axis unit which comprises a drive unit for moving the projection apparatus, and a second acquisition apparatus, which is embodied to acquire position data of a medical operator during preparation of the object for the medical imaging examination, wherein the projection apparatus, using the acquired position data of the second acquisition apparatus, is tracked to a position of the medical operator in the longitudinal direction of the couch during preparation of the object.

Abstract: At least one example embodiment provides a magnetic resonance imaging system comprising at least one local radiofrequency (RF) coil; and at least one marker element, wherein the magnetic resonance imaging system is configured to activate the at least one marker element and deactivate the at least one marker element such that the at least one marker element is detectable by the magnetic resonance imaging system at a position relative to the at least one local RF coil if the at least one marker element is activated, and the at least one marker element is not detectable by the magnetic resonance imaging system if the at least one marker element is deactivated.

Abstract: A method and positioning system for determining a region to be examined in a subject on a movable support of a medical imaging system. The method includes: a) manually specifying the region by positioning a predetermined marker object in relation to the subject; b) acquiring the position of the marker object by an acquisition apparatus; c) projecting or displaying a feedback marking by a projection apparatus at the acquired position on the subject, wherein the position of the marker object and the acquired position are adjustable; d) calculating a scan position of the movable support on the basis of the acquired position by means of a computer unit, wherein in the scan position, the region to be examined is arranged in an acquisition region of the imaging system; and e) automatically moving the movable support into the scan position with a motor.

Abstract: A method for assigning a spatial orientation to a movement signal of a movement of an examination object of a magnetic resonance examination, a magnetic resonance apparatus and a computer program product. According to the method, a first movement signal is captured by means of a first movement capture method. During the capture of the first movement signal, at least one further movement signal is captured by means of at least one further movement capture method. A spatial orientation is assigned to at least one component of the first movement signal by comparing the first movement signal with the at least one further movement signal.

Abstract: A direct current (DC) motor for operation in an external magnetic field may include a rotor which is rotatable about a rotation axis and has at least two windings, at least four continuous rotary transmitters, wherein two rotary transmitters are associated with each of the windings and are configured to supply the associated winding with direct current, an angle sensor which is configured to determine the angular position of the rotor, and a controller configured to control the current feed to at least one of the windings dependent upon the angular position of the rotor. The motor is oriented relative to an external magnetic field during operation so that the rotation axis extends transversely to the external magnetic field.

Abstract: The disclosure relates to an RF coil device for an MR or hybrid MR-PET imaging modality, the RF coil device having a marker arrangement comprising a plurality of electromagnetic radiation markers disposed at the outer surface of its housing, wherein the electromagnetic radiation markers are adapted to reflect or emit electromagnetic radiation within the ultraviolet, visible, infrared (IR) and/or Terahertz spectrum. The disclosure also relates to detecting the position and/or orientation and/or shape of the RF coil device using electromagnetic radiation emitted from the electromagnetic radiation markers, and determining an attenuation map for the RF coil device by transforming a predefined attenuation map using the determined position and/or orientation and/or shape of the RF coil device.

Abstract: A curtain for shielding an electromagnetic field may include a plurality of strip elements. A first strip element and a second strip element of the plurality of strip elements may have an electrically conductive layer. In a shielding configuration of the curtain, the electrically conductive layer of the first strip element is electrically connected to the electrically conductive layer of the second strip element and/or to an electrical connecting terminal for a reference potential. The plurality of strip elements can be variably positioned against one another.

Abstract: A method for calibrating a motion detection method, to a local coil, a magnetic resonance apparatus and a computer program product. The motion detection method is configured for detecting motion of an object under examination during a magnetic resonance measurement by a magnetic resonance apparatus. First motion data of the object under examination is acquired in a capture period in accordance with the motion detection method. In addition, second motion data of the object under examination is acquired in the capture period in accordance with at least one other motion detection method. The motion detection method is calibrated using the first motion data and the second motion data.

Abstract: A computer-implemented method for operating an MR facility having a main magnet unit with a patient bore. A field of view (FOV) of the MR facility, defined by a main magnetic field's homogeneity, lies within the bore. A patient bench to position the patient within the patient bore is longitudinally movable. Additionally, a local coil arrangement with at least one coil element to measure MR data is freely positionable on the patient bench and/or a patient's body to be measured with respect to the longitudinal direction. The method includes: ascertaining position information of the local coil arrangement in the longitudinal direction using a measuring device when the patient bench is partially outside the patient bore; ascertaining recording information describing the local coil arrangement's position with respect to the FOV; and automatically positioning the patient bench in the longitudinal direction at an approach position ascertained from the position and recording information.

Abstract: A position determination system for detecting a position of an object, wherein the position determination system comprises: a reference arrangement with reference colors with a first color code extending in a direction of a path of movement of the object, wherein along the path of movement, the first color code has color-differentiated and non-repeating discrete color sections as reference colors; a sensor unit with a sensor head, the sensor unit configured to read out the reference colors of the reference arrangement arranged at a position of the sensor head and to forward the read out reference colors to an evaluation unit; and at least one light source configured to illuminate the reference colors of the reference arrangement arranged at the position of the sensor head.

Abstract: The disclosure is directed to an MR-PET apparatus with a patient table and a plug-in connecting unit having at least one plug-in connecting element arranged on the patient table. The at least one plug-in connecting unit may be designed to enter into a releasable connection with a corresponding plug-in connecting element of an external apparatus. A position of the at least one plug-in connecting element may be adjustable and the plug-in connecting unit has an adjusting unit for an independent adjustment of a target position of the at least one plug-in connecting element on the patient table.

Abstract: A method for ascertaining at least one of a position or an orientation of an MR local coil unit for arrangement inside a main magnetic field includes providing a first 3D relative position of a reference sensor system in relation to the main magnetic field; receiving an acceleration vector from at least one acceleration sensor; retrieving a distance vector describing a fixed relative position as a function of the received acceleration vector; calculating a second 3D relative position of the at least one acceleration sensor in relation to the main magnetic field based on the first 3D relative position and the retrieved distance vector; and ascertaining the at least one of the position or the orientation of the MR local coil unit using the first 3D relative position and the second 3D relative position.

Abstract: According to one or more example embodiments, a shim apparatus for an MR apparatus includes a specimen holder, the specimen holder including a plurality of MR reference specimens, the MR reference specimens being on the specimen holder; a frame; a shaft, the shaft being mounted on the frame such that the shaft is rotatable about an axis of rotation, the specimen holder being non-rotatably connected to the shaft, the MR reference specimens being spaced apart from the axis of rotation; a drive unit, the drive unit being configured to output a torque, the drive unit being electrical or pneumatic; and a gear unit, the gear unit being configured to transfer the torque output by the drive unit to the shaft and to rotate or swivel the MR reference specimens about the axis of rotation.

Abstract: A computer-implemented method for provision of a result dataset having position information of a local radio-frequency coil, including: providing input data having at least magnetic resonance data, which is acquired by means of the local radio-frequency coil; determining a result dataset by applying a trained function to the input data, wherein the result dataset comprises position information for determining the position of the local radio-frequency coil; and providing the result dataset.