Magnetic resonance device having switching unit and method for operating such magnetic resonance device

Abstract

The invention relates to a magnetic resonance apparatus having a switching unit and a method for operating such a magnetic resonance apparatus. The invention relates to a magnetic resonance device comprising a power amplification unit, which is designed to provide a transmission signal to be emitted by means of the magnetic resonance device, and a switching unit. The switching unit includes an actuator unit, a first plug connection connected to the power amplification unit, and a plurality of second plug connections. The actuator unit is designed to move the first plug connector relative to the plurality of second plug connectors in such a way that an electrical connection is established between the first plug connector and a predetermined second plug connector of the plurality of second plug connectors.

Description

Technical Field

[0001] The invention relates to a magnetic resonance device having a switching unit and a method for operating such a magnetic resonance device. Background Art

[0002] In medical technology, imaging with the aid of magnetic resonance (MR), also known as magnetic resonance tomography (MRI), is characterized by a high soft tissue contrast. In this case, a person or animal as a patient is usually positioned in the main magnetic field of the magnetic resonance device. During the magnetic resonance measurement, high-frequency (HF) pulses are usually injected into the patient's body by means of a high-frequency antenna unit of the magnetic resonance device. The generated high-frequency pulses excite nuclear spins in the patient's body, thereby generating position-encoded magnetic resonance signals. The magnetic resonance signals are received by the magnetic resonance device and used to reconstruct the magnetic resonance image.

[0003] For signal excitation in magnetic resonance devices with ultra-high main magnetic fields (UHF), such as 7 Tesla or more, local coils, in particular transmit-receive coils specific to the body region, are usually used. Compared to lower magnetic field strengths, such as 3 Tesla or less, the use of whole-body transmit coils (English: body coils) has not yet gained acceptance, in particular because their transmission and SAR efficiency are generally lower. Therefore, for magnetic resonance measurements with ultra-high frequency magnetic resonance devices, it is necessary to change the coil for each measurement region.

[0004] In order to connect local coils, the magnetic resonance device on the patient table usually has one or more local coil connection units, for example in the form of one or more sockets. Depending on which area is to be measured, the corresponding local coil is connected to one of the multiple local coil connection units. Each local coil connection unit has multiple transmission and reception channels. In order to meet workflow and safety requirements, the cable length of the pluggable local coil is usually selected to be as short as possible. Therefore, the local coil suitable for a specific measurement is connected to the nearby local coil connection unit. However, the total number of transmission and reception channels of the magnetic resonance device is limited, so the number of local coil connection units is also limited, and their spatial distribution on the patient table is also limited. Summary of the invention

[0005] The technical problem to be solved by the present invention can be regarded as improving the workflow when measuring with local coils. Specifically, the technical problem can be regarded as providing a plurality of local coil connection units for connecting local coils, in particular transmit-receive coils, in a cost-effective manner.

[0006] The technical problem is solved by a magnetic resonance device and a method for ensuring a correct connection. Regardless of the grammatical gender of a particular term, persons with male and female identities are included.

[0007] A magnetic resonance device is proposed, which includes a power amplifier unit and a switching unit, wherein the power amplifier unit is configured to provide a transmission signal emitted by means of the magnetic resonance device. The transmission signal to be emitted is suitable, for example, for implementing a parallel transmission technology (pTx). The switching unit includes an actuator unit, a first plug connector connected to the power amplifier unit, and a plurality of second plug connectors. The actuator unit is configured to move, in particular position, the first plug connector relative to the plurality of second plug connectors so that an electrical connection, in particular a plug connection, is established between the first plug connector and a predetermined second plug connector of the plurality of second plug connectors. The actuator unit is particularly configured to switch the first plug connector between the plurality of second plug connectors.

[0008] Advantageously, a certain number of available transmission channels can be switched to a local coil connection unit by means of the switching unit. The magnetic resonance device comprises in particular a plurality of local coil connection units, in particular plug locations, which are each provided to connect a local coil to the magnetic resonance device, wherein each of the plurality of second plug connections is electrically connected to one of the plurality of local coil connection units. The invention advantageously simplifies the distribution of high-frequency transmission power to the plurality of local coil connection units with low expenditure on additional radio frequency lines and / or switching contacts.

[0009] The magnetic resonance device, in particular the power amplifier unit, for example, has N (N≥1) transmission channels connected to the first plug connector; the switching unit, for example, has M (M>1) second plug connectors and M local coil connection units connected thereto. Each of the M local coil connection units can advantageously be connected to the N transmission channels via the switching unit. If there is no switching unit, this usually requires NxM transmission channels instead of only N transmission channels, that is, the number of transmission channels of the power amplifier unit (and related hardware such as amplifiers) can be advantageously reduced.

[0010] By using a plug-in connector or a plug connection, a connection with high interference resistance, high switching power (usually required power range is about 8-32 kW peak) and / or low losses can be provided. Therefore, such a plug connection is significantly superior to any semiconductor switch. In addition, any possible reflections at the open end can also be advantageously avoided. The proposed plug connection is advantageously suitable for magnetic fields or compatible with magnetic resonance. In addition, the proposed switching unit can be realized relatively cost-effectively.

[0011] The predetermined second plug connector can be predetermined, for example, by a manual selection by an operator of the magnetic resonance device of a local coil connection unit connected to the second plug connector. It is also conceivable that this selection is automatically made depending on the magnetic resonance examination to be performed. For example, if a head examination is to be performed, a connection can be automatically established with a second plug connector that is connected to a local coil connection unit that is generally suitable or best suited for connecting a head coil.

[0012] The first plug connector advantageously corresponds mechanically and / or electrically to each of the plurality of second plug connectors. The first plug connector in particular constitutes a counterpart of each of the plurality of second plug connectors. The first plug connector is, for example, a plug, and each of the plurality of second plug connectors is a corresponding socket.

[0013] The first plug connector is, for example, a plug, and the plurality of second plug connectors are bushes corresponding to the plugs. The first plug connector is, for example, a bush, and the plurality of second plug connectors are plugs corresponding to the bushes.

[0014] The first plug-in connector advantageously forms a system for transmitting information and / or electrical energy with the second plug-in connector connected thereto. Advantageously, a transmission signal to be emitted can be transmitted via the electrical connection.

[0015] Advantageously, each of the plurality of second plug-in connectors is provided to form an electrical connection with the first plug-in connector, so that the transmission signal can be transmitted via the electrical connection.

[0016] The first plug connector has in particular a first shape, in particular a first geometry, and each of the plurality of second plug connectors has a second shape, in particular a second geometry, wherein the first shape and the second shape are adapted to one another such that they can be mechanically guided and / or mesh with one another when establishing an electrical connection.

[0017] The first plug-in connector and / or the plurality of second plug-in connectors may in particular have a housing. The shape of the plug-in connector may in particular depend on the shape of the housing of the plug-in connector.

[0018] The first plug connector and / or the plurality of second plug connectors preferably have electrical contact elements corresponding to each other, such as electrical contact pins and / or electrical contact openings. The contact elements are preferably arranged to form a power-fixed contact (in the connected state). A single contact is preferably arranged to transmit a peak power of more than 0.5 kW, in particular more than 1 kW, in particular more than 1.5 kW. A single contact is preferably arranged to transmit an average power of more than 50 W, in particular more than 100 W, in particular more than 150 W. A single switching unit is preferably arranged to transmit a total peak power of more than 8 kW, in particular more than 12 kW, in particular more than 16 kW. A single contact is preferably arranged to transmit an average power of more than 0.8 kW, in particular more than 1.2 kW, in particular more than 1.6 kW.

[0019] The first plug connector and / or the plurality of second plug connectors preferably have at least one electrical contact pin and / or at least one contact opening corresponding thereto. The shape of the plug connector can depend in particular on the electrical contact pin of the plug connector and / or the receiving portion of the electrical contact pin on the corresponding plug connector. The electrical contact pin usually points outward (male part of the plug connector). The receiving portion usually points inward (female part of the plug connector). The plug connector can have both contact pins and contact openings at the same time, i.e., a hermaphroditic plug element.

[0020] The first plug-in connector and / or the plurality of second plug-in connectors preferably comprise at least one coaxial electrical contact element.

[0021] The first plug-in connector and / or the plurality of second plug-in connectors include, for example, at least one coaxial contact pin. A coaxial connection enables particularly low-noise signal transmission.

[0022] The first plug-in connector and / or the plurality of second plug-in connectors preferably comprise at least one mechanical guide element.

[0023] The first plug-in connector and / or the plurality of second plug-in connectors have, for example, at least one mechanical guide pin and / or at least one guide opening corresponding thereto. The at least one mechanical guide pin is advantageously solid.

[0024] The first plug-in connection comprises, for example, a mechanical guide pin, and the plurality of second plug-in connections each comprises a guide opening corresponding to the mechanical guide pin.

[0025] The at least one mechanical guide pin with the at least one guide opening assigned thereto advantageously enables a precise and / or reliable plugging process of the first plug-in connection part into the respective second plug-in connection part.

[0026] The actuator unit preferably includes at least one actuator. The actuator is in particular a component for converting a control signal, in particular an electrical control signal, into a mechanical movement. The control signal can be transmitted to the actuator unit by a system control unit of the magnetic resonance device, for example. The actuator unit preferably includes an actuator control unit, which is used to receive the control signal of the system control unit.

[0027] The system control unit is preferably configured to send control signals to the actuator control unit as a function of the magnetic resonance sequence to be performed of one or more local coils selected in particular for this purpose. For example, if a patient's head is to be measured using a magnetic resonance sequence, the actuator unit advantageously establishes a connection between a first plug connector and a second plug connector, which is connected to a local coil connection unit, to which the head coil is suitable for connection.

[0028] The actuator unit, in particular at least one actuator, comprises, for example, at least one pneumatic drive device. Preferably, force is transmitted by means of a gas, such as compressed air, to move the first plug connector.

[0029] The actuator unit, in particular at least one actuator, comprises, for example, at least one hydrodynamic drive. Preferably, force is transmitted by means of a fluid, for example oil (compatible with possible standards) to move the first plug-in connection.

[0030] The at least one pneumatic drive and / or the at least one hydraulic drive are preferably designed to convert pressure energy into kinetic energy in order to move the first plug-in connection.

[0031] The actuator unit, in particular at least one actuator, comprises, for example, at least one electric motor. The at least one electric motor is preferably an electromechanical converter, which converts electrical power into mechanical power in order to move the first plug-in connector.

[0032] At least one electric motor is preferably shielded. Interference is advantageously reduced by shielding.

[0033] The magnetic resonance device preferably comprises magnets for generating a main magnetic field, wherein at least one electric motor comprises a rotor which cooperates with the main magnetic field of the magnetic resonance device as a permanent magnetic field of the electric motor. The already existing main magnetic field can advantageously be used to operate the electric motor.

[0034] The actuator proposed above is also advantageously suitable for carrying out switching processes in strong magnetic fields.

[0035] The actuator unit preferably comprises a roller tap. The first plug connector can be arranged in particular on a running track. For example, a transmission line with a diameter of about 5 mm and a bending circle diameter of about 8 cm is used here. It is also conceivable to use a winding mandrel with a diameter of about 10 cm and a spring return force. In particular, two windings are sufficient here to provide a displacement path of about 50 cm for the plug connector.

[0036] The actuator unit is preferably configured to move the first plug connector in at least two spatial directions (movement directions). For example, a plurality of second plug connectors are arranged along a straight line, wherein the straight line corresponds to the first movement direction of the actuator unit.

[0037] The second plug-in connectors are preferably arranged in a plane, wherein the actuator unit is configured to move the first plug-in connector parallel to the plane in order to bring the first plug-in connector into the vicinity of and / or align it with one of the second plug-in connectors.

[0038] The second displacement direction of the actuator unit is, for example, a direction perpendicular to the first displacement direction, so that by displacement in this direction the first plug connector can be connected to one of the second plug connectors and by displacement in the opposite direction the connection can be released again.

[0039] The second plug-in connectors are preferably arranged in a plane, wherein the actuator unit is provided to move the first plug-in connector perpendicularly to the plane in order to connect the first plug-in connector to one of the second plug-in connectors and to release the connection again by moving in the opposite direction.

[0040] The switching unit is advantageously arranged in the same space as (the rest of) the magnetic resonance device, in particular the magnet unit of the magnetic resonance device. The magnetic resonance device preferably comprises a patient table and a magnet unit for generating a main magnetic field of the magnetic resonance device, wherein the switching unit is arranged in the region of the patient table and / or in the vicinity of the magnet unit.

[0041] Arranging the switching unit on the magnetic resonance device advantageously enables shorter signal lines to be achieved. Arranging the switching unit in a space adjacent to the space in which the magnetic resonance device is located would, on the other hand, require relatively long signal lines. This also minimizes the line losses that are otherwise present, so that the requirements on the withstand voltage of the electrical connection can be significantly reduced.

[0042] The magnetic resonance device preferably has a main magnet with a strength of at least 5 Tesla. In such a magnetic resonance device, local coils, in particular high-frequency transmission coils, can be used particularly effectively by means of the local coil connection unit.

[0043] The magnetic resonance device preferably comprises at least one local coil which is designed to emit high-frequency pulses into an examination region of the magnetic resonance device in accordance with a provided transmit signal.

[0044] Furthermore, a method for ensuring a correct connection is proposed. In this case, at least one radio-frequency pulse is emitted by the magnetic resonance device and the reflection of the radio-frequency pulse is analyzed in terms of amplitude and / or phase. Advantageously, it can be determined based on the analyzed information whether the switching unit has established a connection with the correct second plug connector and the local coil connection unit connected to the second plug connector.

[0045] Preferably, at least one high-frequency pulse is emitted at the beginning of the magnetic resonance sequence, thereby advantageously making it possible to detect possible faults at an early stage.

[0046] The at least one high-frequency pulse preferably has a low amplitude, thereby advantageously enabling the examination to be carried out particularly safely.

[0047] The features, advantages or alternative embodiments of the proposed magnetic resonance device described in detail above can be applied to the proposed method to ensure a correct connection and vice versa. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Other advantages, features and details of the present invention can be seen from the following description of the exemplary embodiments and the drawings. Corresponding parts are provided with the same reference numerals in all the figures.

[0049] In the schematic view:

[0050] Figure 1 shows a magnetic resonance apparatus,

[0051] Figure 2 shows a switching unit with a second row of plug-in connectors,

[0052] Figure 3 shows a switching unit with two rows of second plug-in connectors,

[0053] Figure 4 shows a possible arrangement of the switching unit on the magnetic resonance device,

[0054] Figure 5 A method for ensuring a proper connection is shown. DETAILED DESCRIPTION

[0055] exist Figure 1Schematically shown in the figure is a magnetic resonance device 10. The magnetic resonance device 10 includes a magnet unit 11, which has a main magnet 12 for generating a strong and especially time-constant main magnetic field 13. The main magnetic field 13 is especially an ultra-high magnetic field. In addition, the magnetic resonance device 10 includes a patient accommodation area 14 for accommodating a patient 15. The patient accommodation area 14 is cylindrically designed in the current embodiment and is cylindrically surrounded by the magnet unit 11 along the circumference. The patient 15 can be moved into the patient accommodation area 14 by means of a patient support device 16 of the magnetic resonance device 10. For this purpose, the patient support device 16 has a patient table 17 designed to be movable in the patient accommodation area 14.

[0056] The magnet unit 11 also has a gradient coil unit 18 for generating a magnetic field gradient, which is used for position encoding during imaging. The gradient coil unit 18 is controlled by means of a gradient control unit 19 of the magnetic resonance device 10. The magnet unit 11 also includes a high-frequency antenna unit 20, which is designed as a body coil fixedly integrated in the magnetic resonance device 10 in the current embodiment. However, unlike what is shown here, ultra-high frequency magnetic resonance devices usually do not have a body coil fixedly integrated into the magnetic resonance device 10; instead, local coils specific to body regions are used, such as the head coil 27 or the spine coil 28 here, which are set to irradiate a high-frequency magnetic resonance sequence into an examination space, which is essentially formed by the patient accommodation area 14 of the magnetic resonance device 10. As a result, atomic nuclei are excited in the main magnetic field 13 generated by the main magnet 12. Magnetic resonance signals are generated by the relaxation of the excited atomic nuclei. The local coils are set here both to transmit high-frequency signals and to receive magnetic resonance signals.

[0057] In order to control the main magnet 12, the gradient control unit 19, and to control the high-frequency antenna control unit 21, the magnetic resonance device 10 has a system control unit 22. The system control unit 22 centrally controls the magnetic resonance device 10, for example, executes a predetermined imaging gradient echo sequence. In addition, the system control unit 22 includes an analysis unit, not shown in detail, which is used to analyze the magnetic resonance signals detected during the magnetic resonance examination. In addition, the magnetic resonance device 10 includes a user interface 23 connected to the system control unit 22. Control information, such as imaging parameters and reconstructed magnetic resonance imaging can be displayed to a medical operator on a display unit 24 of the user interface 23, such as at least one display. In addition, the user interface 23 has an input unit 25, by means of which information and / or parameters can be input by the medical operator during the measurement process.

[0058] For operating the local coil, the magnetic resonance device 10 comprises a high-frequency antenna control unit 21, which has a power amplifier unit with a plurality of transmission channels. The power amplifier unit is provided to provide the signal to be transmitted, for example, to generate a pTx pulse. For switching the available transmission channels, the magnetic resonance device comprises a switching unit 26, which switches the transmission channels between the transmission channels. Figure 2 and Figure 3 The transmission line of the power amplifier unit ends at the first plug connector of the switching unit (see Figure 2 and Figure 3 ).

[0059] Figure 2 The switching unit is shown, which includes: an actuator unit, a first plug connector V connected to the power amplifier unit of the high-frequency antenna control unit 21 11 , and four second plug connectors V 21 、V 22 、V 23 、V 24 The actuator unit A is configured to connect the first plug connector V 11 The four second plug-in connectors are positioned such that on the first plug-in connector V 11 and a plurality of second plug connectors V 21 、V 22 、V 23 or V 24 An electrical connection is established between one, in particular a pre-selected second plug-in connector.

[0060] To this end, the actuator unit A can be connected in the ±x1 direction along the plug connector V arranged along a straight line parallel to the x1 direction. 21 、V 22 、V 23 、V 24 Move the first plug connector V 11 . ( Figure 2 and Figure 3 The directions x1, x2, x3 in the diagram are preferably mutually orthogonal). By moving along these directions, it is possible to approach the respectively desired second plug connector V. 21 、V 22 、V 23 or V 24 (After this approach, the first plug connector V 11 For example, at the second plug connector V 23 ).

[0061] In addition, the actuator unit A can also move the first plug connector V along the ±x3 direction 11 By moving in this direction, the first plug connection V can be reestablished or released. 11With the desired second plug connector V 21 、V 22 、V 23 or V 24 (For example, after approaching, the second plug connector V 23 Upper plug connector V 11 Move down to the plug connection V 23 to establish electrical connection).

[0062] In order to control these movements, the switching unit 26 also includes an actuator control unit S, which can receive control signals from the system control unit 22 and convert these control signals into the first plug-in connection V by means of the actuator unit A. 11 The system control unit 22 also controls the high-frequency antenna control unit 21 and its power amplifier unit, which in the present case comprises eight power amplifiers for each transmission channel. 11 Accordingly, there are also eight electrical contact elements C1. These contact elements can be, for example, electrical contact pins. 11 Insert the desired second plug connector V 21 、V 22 、V 23 or V 24 When in operation, these electrical contact pins are electrically connected to corresponding contact elements C2, in particular contact openings.

[0063] In order to achieve a reliable connection process, especially a plug-in process, the plug-in connector V 11 and V 21 、V 22 、V 23 or V 24 There may be guide elements G1 or G2 that mesh with one another. The guide elements may be, for example, solid guide pins that are inserted into opposite openings during the connection process.

[0064] Four second plug connectors V 11 and V 21 、V 22 、V 23 、V 24 Each second plug connector is electrically connected to the corresponding local coil connection unit L1, L2, L3 or L4. In the connected state, the eight transmission signals provided by the power amplifier unit can be transmitted to the corresponding local coil connection unit L1, L2, L3 or L4 through the interconnected plug connectors.

[0065] The local coil connection units L1, L2, L3, L4 are arranged on the patient table 17. For example, if a local coil is to be connected to the local coil connection unit L4 and operated, the first plug connector V is connected by means of the actuator unit A. 11 Insert the second plug connector V 24 In order to electrically connect the transmission channel of the power amplification unit to the local coil connection unit L4.

[0066] Figure 3 The second plug connector V has eight 21 、V 22 、V 23 、V 24 、V 25 、V 26 、V 27 、V 28 The second plug connectors are arranged in two rows staggered along the x direction. 21 、V 22 、V 23 、V 24 、V 25 、V 26 、V 27 、V 28 The actuator unit is advantageously also configured to move the first plug connector V along the x2 direction. 11 , so that it can be connected to the second plug connector V 21 、V 22 、V 23 、V 24 、V 25 、V 26 、V 27 or V 28 A connection is established using one of the second plug-in connectors.

[0067] The local coil connection units L1, L2, L3, L4, L5, L6, L7, L8 are distributed at both ends of the patient table 17. This makes it easier to position the local coil in the correct position for the measurement even with short cable lengths. This also makes it easier to change the coil by re-plugging the local coil.

[0068] Figure 4 Particularly suitable positions for arranging the switching unit are shown. For example, the switching unit can be arranged at the end 26a of the patient table 17, or at the rear 26b of the patient table, or at the front side of the magnet unit 11 behind its cover (especially when the transmission line enters the couch from here).

[0069] Figure 5 A method for ensuring a correct connection is shown. In S1 , the power amplification unit provides a signal to be emitted in order to generate a high frequency pulse.

[0070] In S2, the signal measured by the receiving unit (e.g., the local coil if it is a transmitting / receiving coil) of the magnetic resonance device is analyzed in terms of amplitude and / or phase. For example, if the measured signal is too low, it can be concluded from this that a correct connection is not established between the power amplifier unit and the transmitting unit (e.g., the local coil if it is a transmitting / receiving coil). This may be due in particular to the switching unit not establishing a correct connection.

[0071] S1 and S2 are preferably performed at the beginning of a magnetic resonance sequence. The transmission signal to be emitted preferably has a low amplitude.

[0072] Finally, it should be noted again that the magnetic resonance apparatus and method described in detail above are only embodiments, and those skilled in the art can optimize the embodiments in different ways, as long as they do not depart from the scope of the present invention. In addition, the indefinite pronouns "a (masculine, neuter)" or "a (feminine)" do not exclude that the features involved may also exist in multiple numbers. Similarly, the concept "unit" does not exclude that the components involved are composed of multiple sub-components that act together, and the sub-components may also be dispersed in space.

Claims

1. A magnetic resonance device, comprising: a power amplification unit, the power amplification unit being configured to provide a transmission signal to be sent, A switching unit, wherein the switching unit comprises an actuator unit, a first plug connector connected to the power amplification unit, and a plurality of second plug connectors, Therein, the actuator unit is configured to move the first plug-in connector relative to the plurality of second plug-in connectors such that an electrical connection is established between the first plug-in connector and one of the plurality of second plug-in connectors.

2. The magnetic resonance apparatus according to claim 1, in, The actuator unit comprises at least one pneumatic drive and / or at least one hydraulic drive.

3. The magnetic resonance apparatus according to claim 1 , in, The actuator unit comprises at least one electric motor, which is in particular shielded.

4. The magnetic resonance apparatus according to claim 3, in, The magnetic resonance device comprises a magnet unit for generating a main magnetic field. Therein, at least one electric motor comprises a rotor which cooperates with a main magnetic field of the magnetic resonance device as a permanent magnetic field of the electric motor.

5. The magnetic resonance device according to claim 1, in, A plurality of second plug connectors are arranged in a plane, Therein, the actuator unit is configured to move the first plug connector parallel to the plane in order to bring the first plug connector into the vicinity of one of the plurality of second plug connectors, in particular to align it with one of the plurality of second plug connectors.

6. The magnetic resonance device according to claim 1, in, A plurality of second plug connectors are arranged in a plane, Therein, the actuator unit is configured to move the first plug-in connector perpendicularly to the plane in order to detachably connect the first plug-in connector to one of a plurality of second plug-in connectors.

7. The magnetic resonance device according to claim 1, in, The magnetic resonance apparatus comprises a patient table, The magnetic resonance device comprises a magnet unit for generating a main magnetic field of the magnetic resonance device. Therein, the switching unit is arranged in the region of the patient table and / or in the vicinity of the magnet unit.

8. The magnetic resonance device according to claim 1, in, The first plug-in connector and / or the plurality of second plug-in connectors comprise at least one coaxial electrical contact element, in particular at least one coaxial contact pin.

9. The magnetic resonance device according to claim 1, in, The first plug-in connector and / or the plurality of second plug-in connectors comprise at least one mechanical guide element, in particular at least one mechanical guide pin.

10. The magnetic resonance device according to claim 1, in, The magnetic resonance apparatus comprises a system control unit, The actuator unit comprises an actuator control unit, and the actuator control unit is configured to receive a control signal from the system control unit.

11. The magnetic resonance apparatus according to claim 10, in, The system control unit is configured to send the control signal to the actuator control unit in dependence on a magnetic resonance sequence to be performed.

12. The magnetic resonance device according to claim 1, in, The magnetic resonance apparatus comprises a plurality of local coil connection units which are each provided to connect a local coil to the magnetic resonance apparatus. Therein, each second plug-in connector of the plurality of second plug-in connectors is electrically connected to one of the plurality of local coil connection units.

13. The magnetic resonance device according to claim 1, in, The magnetic resonance device comprises at least one local coil which is designed to emit high-frequency pulses into an examination region of the magnetic resonance device in accordance with a provided transmission signal.

14. A method for ensuring a correct connection, in, With the magnetic resonance apparatus according to one of the preceding claims, in particular at the start of a magnetic resonance sequence, a transmit signal to be emitted is provided to generate at least one high-frequency pulse, in particular with a low amplitude, and a signal measured by a receiving unit of the magnetic resonance apparatus is evaluated.

15. The method according to claim 14, in, The measured signal is analyzed with respect to its amplitude and / or phase.

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