Abstract: Techniques are described for carrying out a dental magnetic resonance imaging examination of a field-of-view within a subject, the field-of-view including a dental area of the subject. The techniques include determining whether a metallic object is present within or near the field-of-view, initiating a standard examination workflow if it has been determined that no metallic object is present within or near the field-of-view, and initiating a modified examination workflow that is different from the standard examination workflow if it has been determined that a metallic object is present within or near the field-of-view, and carrying out the standard examination workflow or the modified examination workflow.

Abstract: An arrangement is provided with a body coil and a gradient coil for a magnetic resonance system. The arrangement includes a cylindrical carrier element on which the body coil is arranged. The body coil and the gradient coil are configured to be arranged spaced from one another. An intermediate space extends between the body coil and the gradient coil. Additionally, at least one subregion of the intermediate space is evacuated. A magnetic resonance system including such an arrangement is also provided.

Abstract: Systems and methods for ascertaining an item of movement information concerning movement of an object under examination during a magnetic resonance scan. A pilot tone signal generator of a magnetic resonance apparatus transmits a pilot tone signal. At least one first coil element of the magnetic resonance apparatus receives the pilot tone signal. The pilot tone signal received by the at least one first coil element is in each case a first pilot tone received signal. At least one second coil element of the magnetic resonance apparatus receives the pilot tone signal. The pilot tone signal received by the at least one second coil element is in each case a second pilot tone received signal. The at least one first pilot tone received signal is corrected with the aid of the at least one second pilot tone received signal. The item of movement information for the object under examination is ascertained using the corrected at least one first pilot tone received signal.

Abstract: The disclosure relates to a cooling apparatus with a control unit for a detector unit included in a magnetic resonance device. The control unit comprises at least two electronic components that generate waste heat during operation of the magnetic resonance device. The control unit is to be arranged on a surface of the detector unit, and comprises an active cooling unit comprising at least one piezoelectric fan, which is embodied to generate an airflow on a surface of the control unit and/or on a surface of at least one electronic component of the at least two electronic components.

Abstract: A local coil may have a mounting, at least one antenna, and a flexible element. The mounting may position the local coil in a specified position relative to the head of a patient, where the antenna may receive high-frequency signals in a frequency and power range of a magnetic resonance (MR) measurement. The flexible element may at least partly form the local coil on the surface contour of the patient's head. The local coil may at least partly surround the patient's head when the local coil is positioned during use, and a section of the local coil including the antenna can be positioned on the patient's temporomandibular joint using the mounting. The local coil may receive MR signals of the temporomandibular joint using the antenna. A MR device may include the local coil and detect MR signals of a region of the patient using the local coil.

Abstract: A dental coil comprises a first element and a second element. The first element is composed of a dimensionally stable material and has a recess that is configured to receive at least one of a mouth region or a nose region of a patient when the dental coil is positioned on the jaw region of the patient during use. The second element has a flexible element that is configured to allow the flexible element to take the shape of the jaw region of the patient. The first element and the second element have an antenna configured to receive high-frequency signals in a frequency and power range of a magnetic resonance measurement.

Abstract: A computer-implemented method for foodstuff quality control may include obtaining, based on a MR measurement, a respective signal strength curve for measurement volume(s) including portion(s) of the sample. The signal strength curve may include a signal strength for measurement time points within a measurement interval, the respective signal strength resulting from an excitation of the measurement volume by an excitation signal radiated during the measurement interval. The method may also include determining a respective ingredient signal curve for the potential ingredients, and determining relative ingredient contents of the potential ingredients. The determination of the ingredient contents may include: minimizing a difference between the signal strength curve for the respective measurement volume and a sum of the ingredient signal curves weighted according to the relative ingredient contents.

Abstract: A method of operating a magnetic resonance imaging (MRI) apparatus includes exciting a body coil of the MRI apparatus to emit a radio-frequency signal, determining a center frequency of a resonance curve of the body coil, and calculating a magnet target frequency based on the determined center frequency. A magnet is ramped to the magnet target frequency.

Abstract: A magnetic resonance apparatus and a method for operation of the magnetic resonance apparatus are provided. The magnetic resonance apparatus includes a local coil for acceptance and transmission of magnetic resonance signals to the magnetic resonance apparatus. A delay of the magnetic resonance signal between receipt by the local coil and arrival at the magnetic resonance apparatus is variable. In one act of the method, the magnetic resonance apparatus establishes a delay of the magnetic resonance signal between the local coil and the magnetic resonance apparatus and, in a further act, carries out a signal processing process of the transmitted magnetic resonance signal depending on the delay established.

Abstract: A method for operating an imaging modality of a magnetic resonance system and magnetic resonance system. At least one item of environmental information in an environment of the imaging modality is detected with at least one detection unit (of the magnetic resonance system. A potential start time is defined depending on the at least one detected item of environmental information. At least one component of the imaging modality is activated depending on the potential start time.

Abstract: A magnetic resonance apparatus is described for detecting at least one property of a sample, which may include a foodstuff. The magnetic resonance apparatus comprises a magnet unit, which comprises a base magnet and a RF antenna unit, a sample receiving area at least partially surrounded by the magnet unit, and a transport apparatus for introducing at least one sample into the sample receiving area. The magnetic resonance apparatus comprises an radio frequency (RF) shielding unit, which shields the sample receiving area from the outside, such as a region external to the magnetic resonance apparatus.

Abstract: The disclosure relates to a magnetic resonance apparatus having a superconducting main magnet, a magnet cooler for the main magnet and a cooling apparatus for the magnet cooler and further components of the magnetic resonance apparatus that are to be cooled. The cooling apparatus has a cooling circuit with a coolant that can be conveyed via a pump for circulation, and the cooling circuit has a first partial circuit to which the magnet cooler is coupled for cooling, at least one second partial circuit for the further components and a common portion, and at least the second partial circuit has a flow rate setting apparatus for setting the coolant flow rate through the partial circuit and associated with the cooling apparatus is a control apparatus, which is configured for actuating the pump and/or the flow rate setting apparatus dependent upon an operating state information item of the magnetic resonance apparatus.

Abstract: A magnetic resonance apparatus may include at least one sensor and a controller. The magnetic resonance apparatus is positionable in an examination room. A spatial location of the magnetic resonance apparatus in the examination room can be determined using the sensor. In a method for supporting an adjustment of a shim parameter of a magnetic resonance apparatus, a current spatial location of the magnetic resonance apparatus in an examination room is determined using the sensor, and a shim parameter of at least one shim element of the magnetic resonance apparatus is determined based on the current spatial location of the magnetic resonance apparatus and information of a magnetic field database. The magnetic field database may include information about a spatial location of the magnetic resonance apparatus and also magnetic field data correlated with the spatial location.

Abstract: The disclosure relates to a detector unit comprising a radio frequency antenna unit and a gradient coil unit surrounding the radio frequency antenna unit concentrically, each embodied as hollow cylinders surrounding a cylinder axis in the longitudinal direction. The detector unit comprises at least four shim units, which are embodied as oblong shapes and are each arranged in parallel to the cylinder axis at various positions in the circumferential direction on a first inner surface, with said first inner surface corresponding to the side of the gradient coil unit facing towards the cylinder axis, and forming raised areas in the direction of the cylinder axis . The detector unit comprises a fixing unit embodied for fixing the at least four shim units to the gradient coil unit, and an RF screen, which is arranged at least partly between the radio frequency antenna unit and the gradient coil unit.

Abstract: A method for producing a local coil for an MRT measurement, including shaping a coil structure from an elongate conductor; shaping an antenna for the MRT measurement from the coil structure; introducing the antenna into a cavity mold that is designed to receive a liquid plastic material, wherein the antenna is arranged in the cavity mold in such a way that it is at least partially encapsulatable by liquid plastic material; shaping a local coil by filling the cavity mold with a liquid plastic material and curing the plastic material.

Abstract: The disclosure describes techniques for invalidating a local coil for a magnetic resonance tomography (MRT) system. The techniques include carrying out a measurement with the local coil on the MRT system, changing a mechanical and/or an electrical property of the local coil and/or an item of information about the local coil in the MRT system to the extent that a number of measurements possible with this local coil is reduced and, in the case where only the measurement carried out was possible with the local coil, a further measurement is no longer possible with this local coil on the MRT system. The disclosure also relates to a local coil and to an MRT system.

Abstract: A shim tray designed to be pushed into a shim tray receptacle of a gradient coil unit may elongated and have a length in a longitudinal direction, a height in a radial direction and a width in a circumferential direction. The shim tray may include at least two shim pockets each configured to accommodate at least two shim plates, and at least two shim plates arranged one above the other in a radial direction in one of the shim pockets. The surfaces of the at least two shim plates may have an insulating coating.

Abstract: The disclosure relates to a hygiene cover for preventing a contamination of a target surface of a medical imaging device. The hygiene cover is configured for reversibly attaching to the target surface of the medical imaging device and/or a body region of a patient, and the reversible attachment is configured to provide for maintaining a predefined relative position of the hygiene cover to the medical imaging device.

Abstract: Method for positioning a couch in an MR system tunnel, including: positioning a position determination unit having a magnetic field sensor at a marker position on the couch or a patient supported on the couch; evaluating sensor data of a magnetic field sensor using a control unit operable to establish the marker position in a coordinate system of the MR system, in which a FOV position of a FOV of the MR system is known; determining a desired required position of the FOV relative to the marker position for a subsequent measurement of MR data in a direction of movement of the couch corresponding to the longitudinal direction of the couch by the control unit from the marker position; and activating the couch by the control unit using the marker position and the FOV position such that the desired position of the FOV relative to the marker position is set.

Abstract: A local coil apparatus of a magnetic resonance system including a first sensor facility for detecting magnetic resonance signals. The local coil apparatus includes a second sensor facility for detecting an excitation signal of the magnetic resonance system. The excitation signal is configured for exciting the magnetic resonance signal by way of the magnetic resonance system.