阅读说明：本技术 一种多核磁共振收发控制盒 (Multi-core magnetic resonance transmit-receive control box ) 是由 张晴 周玉福 王萍萍 杜汇雨 高楠 祁甫浪 王长亮 罗鹏辉 袁克诚 邱本胜 于 2020-08-21 设计创作，主要内容包括：本发明公开了一种多核磁共振收发控制盒,包括适用于多种核素的发射和接收控制电路。还包括四个接口：发射接口、接收接口、线圈接口、控制接口。发射接口连接磁共振射频放大器端,接收接口连接磁共振信号接收端,线圈接口连接磁共振射频线圈,控制接口连接磁共振系统控制端。一种多核磁共振收发控制盒可以切换电路或调整电路工作频率,从而实现磁共振扫描多种核素的切换。本发明可以连接多种核素的线圈,选择其它成像核素时不需要更换多核磁共振收发控制盒。配合多频线圈可以实现磁共振扫描多种核素的自动切换,磁共振扫描时需要切换成像核素可以直接切换不需要更换线圈和多核磁共振收发控制盒,因此磁共振扫描的位置可以精确不变。(The invention discloses a multi-nuclear magnetic resonance receiving and transmitting control box, which comprises a transmitting and receiving control circuit suitable for multiple nuclides. Still include four interfaces: the device comprises a transmitting interface, a receiving interface, a coil interface and a control interface. The transmitting interface is connected with the magnetic resonance radio frequency amplifier end, the receiving interface is connected with the magnetic resonance signal receiving end, the coil interface is connected with the magnetic resonance radio frequency coil, and the control interface is connected with the magnetic resonance system control end. A multinuclear magnetic resonance receiving and transmitting control box can switch circuits or adjust the working frequency of the circuits, thereby realizing the switching of magnetic resonance scanning multiple nuclides. The invention can be connected with coils of various nuclides, and does not need to replace a multi-nuclear magnetic resonance receiving and transmitting control box when other imaging nuclides are selected. The automatic switching of multiple nuclides in magnetic resonance scanning can be realized by matching with a multi-frequency coil, imaging nuclides can be directly switched without replacing the coil and a multi-core magnetic resonance receiving and transmitting control box when the imaging nuclides are required to be switched in the magnetic resonance scanning, and therefore the position of the magnetic resonance scanning can be accurate and unchanged.)

1. A multinuclear magnetic resonance receiving and dispatching control box which is characterized in that: the multi-nuclear magnetic resonance transceiving control box comprises a transmitting and receiving control circuit suitable for multiple nuclides, and also comprises four interfaces: the multi-core magnetic resonance receiving and transmitting control box comprises a transmitting interface, a receiving interface, a coil interface and a control interface, wherein the transmitting interface is connected with a magnetic resonance radio frequency amplifier end, the receiving interface is connected with a magnetic resonance signal receiving end, the coil interface is connected with a magnetic resonance radio frequency coil, the control interface is connected with a magnetic resonance system control end, and the multi-core magnetic resonance receiving and transmitting control box can switch circuits or adjust the working frequency of the circuits, so that the switching of magnetic resonance scanning of multiple nuclides is realized.

2. The multi-nuclear magnetic resonance transmit-receive control box according to claim 1, characterized in that: the emitting and receiving control circuit suitable for multiple nuclides can be composed of a plurality of emitting and receiving control circuits with single frequency, the emitting and receiving control circuit with the corresponding frequency is required to be switched when a certain nuclide is selected for imaging, and the emitting and receiving control circuits with other frequencies can not work.

3. The multi-nuclear magnetic resonance transmit-receive control box according to claim 1, characterized in that: the emitting and receiving control circuit suitable for multiple nuclides can be composed of an emitting and receiving control circuit with adjustable working frequency, and the emitting and receiving control circuit is adjusted to the corresponding working frequency when a certain nuclide is required to be selected for imaging.

4. The multi-nuclear magnetic resonance transmit-receive control box according to claim 1, characterized in that: the coil interface can have a coil ID identification function, and the multi-core magnetic resonance transceiving control box can be automatically switched to a corresponding working frequency according to the identified coil type.

5. The multi-nuclear magnetic resonance transmit-receive control box according to claim 1, characterized in that: the magnetic resonance system can select the nuclear species for magnetic resonance imaging through the control interface and switch the multi-nuclear magnetic resonance transceiving control box to the corresponding working frequency.

6. The multi-nuclear magnetic resonance transmit-receive control box according to claim 1, characterized in that: the magnetic resonance system can acquire the working frequency of the multi-core magnetic resonance transceiving control box or the type of the connected coil through the control interface.

7. The multi-nuclear magnetic resonance transmit-receive control box according to claim 1, characterized in that: the control interface may switch transmit and receive functions according to a magnetic resonance system scan timing.

8. The multi-nuclear magnetic resonance transmit-receive control box according to claim 1, characterized in that: the coil interface can be a receiving and transmitting integrated coil interface or a one-transmitting and multi-receiving coil interface.

Technical Field

The invention relates to the field of magnetic resonance imaging, in particular to a multi-core magnetic resonance receiving and transmitting control box.

Background

The magnetic resonance imaging system usually uses hydrogen proton (1H) imaging, because the human body contains a large amount of water, and the hydrogen protons contained in water and fat can be used for imaging, besides hydrogen, phosphorus (31P), carbon (13C), fluorine (19), helium (3He), xenon (129Xe) and the like can generate magnetic resonance signals for magnetic resonance imaging or magnetic resonance spectroscopy, and different nuclear species have different lower moire frequencies at the same magnetic field strength, and research shows that the nuclear species have some special uses in magnetic resonance imaging and are of great value for medical research.

The transceiving control box is used for controlling the transmission and the reception of the radio frequency system according to the magnetic resonance scanning time sequence. Currently, some magnetic resonance imaging systems have other nuclear species imaging functions than hydrogen (1H), such as the 3T magnetic resonance system of GE corporation, usa, equipped with a broadband radio frequency amplifier required for multi-nuclear imaging. The frequency band of the radio frequency amplifier is wide enough to be used for imaging of a plurality of nuclear species, but the transceiving control box usually only has a single working frequency and can only be used for specific nuclear species, the imaging nuclear species can not be directly switched during magnetic resonance examination, and a patient needs to be moved out of a magnetic resonance examination area, then the transceiving control box and the radio frequency coil are replaced, and then the patient is moved into the magnetic resonance examination area to carry out imaging examination of other nuclear species. The magnetic resonance imaging scanning position is checked again and can not be completely coincided with the previous position, and errors are brought to multi-pixel imaging contrast research or diagnosis. At the same time, this makes the examination cumbersome, and equipping the transceiver control boxes with a plurality of different nuclides undoubtedly increases the cost.

Disclosure of Invention

The invention aims to solve the problems that: the single working frequency of the magnetic resonance receiving and transmitting control box can only be used for one specific nuclide, if the nuclide to be imaged needs to be replaced during magnetic resonance scanning, the receiving and transmitting control box and the radio frequency coil need to be repositioned during scanning again, and the repositioned position has an error with the previous scanning position. In order to solve the above problems, the present invention provides a multinuclear magnetic resonance transmit-receive control box. The multi-nuclear magnetic resonance transceiving control box can switch circuits or adjust the working frequency of the circuits, thereby realizing the switching of magnetic resonance scanning of various nuclides. The multi-core magnetic resonance receiving and transmitting control box can be matched with a multi-frequency radio frequency coil to realize the free switching of magnetic resonance imaging nuclides and keep the magnetic resonance scanning position unchanged.

The technical scheme adopted by the invention for solving the technical problems is as follows: a multi-nuclear magnetic resonance transmit-receive control box comprises a transmitting and receiving control circuit suitable for multiple nuclear species. The multi-core magnetic resonance transceiving control box further comprises four interfaces: the device comprises a transmitting interface, a receiving interface, a coil interface and a control interface. The transmitting interface is connected with the magnetic resonance radio frequency amplifier end, the receiving interface is connected with the magnetic resonance signal receiving end, the coil interface is connected with the magnetic resonance radio frequency coil, and the control interface is connected with the magnetic resonance system control end. A multinuclear magnetic resonance receiving and transmitting control box can switch circuits or adjust the working frequency of the circuits, thereby realizing the switching of magnetic resonance scanning multiple nuclides.

Further, the emission and reception control circuit suitable for multiple nuclides can be composed of a plurality of emission and reception control circuits with single frequency, and the emission and reception control circuit with the corresponding frequency needs to be switched when a certain nuclide is selected for imaging, and the emission and reception control circuits with other frequencies can not work.

Furthermore, the emitting and receiving control circuit suitable for multiple nuclides can be composed of an emitting and receiving control circuit with adjustable working frequency, and the emitting and receiving control circuit is adjusted to the corresponding working frequency when a certain nuclide is selected for imaging.

Further, the coil interface can have a coil ID identification function, and the multi-core mr transceiving control box can be automatically switched to a corresponding operating frequency according to the identified coil type.

Furthermore, the magnetic resonance system can select nuclear species for magnetic resonance imaging through the control interface, and the multi-nuclear magnetic resonance transceiving control box is switched to the corresponding working frequency.

Further, the magnetic resonance system can acquire the operating frequency of the multi-core magnetic resonance transceiving control box or the type of the connected coil through the control interface.

Further, the control interface may switch transmit and receive functions according to magnetic resonance system scan timing.

Further, the coil interface may be a transceiver coil interface, or a one-transmitter-multiple-receiver coil interface.

The invention has the beneficial effects that:

the multi-nuclear magnetic resonance receiving and transmitting control box can be connected with coils of various nuclides, and the multi-nuclear magnetic resonance receiving and transmitting control box does not need to be replaced when other imaging nuclides are selected. The automatic switching of multiple nuclides in magnetic resonance scanning can be realized by matching with a multi-frequency coil, and imaging nuclides needing to be switched in the magnetic resonance scanning can be directly switched without replacing the coil and the multi-core magnetic resonance receiving and transmitting control box, so that the position of the magnetic resonance scanning can be accurate and unchanged. The selection of the magnetic resonance imaging nuclear species may be automatically selected by the accessed coil or may be selected or switched by user operation.

Drawings

FIG. 1 is a schematic diagram of an interface of a multi-core MR transceiver control box;

FIG. 2 is a schematic diagram of a multi-species transmit and receive control circuit that is switchable by a circuit;

FIG. 3 is a schematic diagram of a multi-species emission and reception control circuit with adjustable operating frequency.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

As shown in fig. 1, the multi-nuclear magnetic resonance transceiving control box of the present invention includes transmission and reception control circuits suitable for multiple nuclear species. The multi-nuclear magnetic resonance transceiving control box further comprises four interfaces: the device comprises a transmitting interface, a receiving interface, a coil interface and a control interface. The transmitting interface is connected with the magnetic resonance radio frequency amplifier end, the receiving interface is connected with the magnetic resonance signal receiving end, the coil interface is connected with the magnetic resonance radio frequency coil, and the control interface is connected with the magnetic resonance system control end. The multi-nuclear magnetic resonance receiving and transmitting control box can switch circuits or adjust the working frequency of the circuits, thereby realizing the switching of magnetic resonance scanning of various nuclides.

The emitting and receiving control circuit suitable for multiple nuclides can be composed of a plurality of emitting and receiving control circuits with single frequency, the emitting and receiving control circuit with the corresponding frequency is required to be switched when a certain nuclide is selected for imaging, and the emitting and receiving control circuits with other frequencies can not work. As shown in fig. 2, it is a schematic diagram of a multi-species emitting and receiving control circuit with switchable circuits, the switching of the emitting and receiving control circuit can be realized by a switch chip or a relay, a multi-species emitting and receiving control circuit can be provided to realize the support of multi-species, and fig. 2 only lists three species.

The emitting and receiving control circuit suitable for multiple nuclides can be composed of an emitting and receiving control circuit with adjustable working frequency, and the emitting and receiving control circuit is adjusted to the corresponding working frequency when a certain nuclide is required to be selected for imaging. According to one embodiment, as shown in fig. 3, it is a schematic diagram of a multi-nuclide transmission and reception control circuit with adjustable operating frequency, according to the transmission line principle, the transmission and reception control circuit may control the transmission and reception on/off by applying positive and negative voltages to a dc control terminal, and the components in the circuit may be composed of an adjustable capacitor and an adjustable inductor, and the magnitudes of the inductance values of these capacitors may be adjusted by circuit control, so as to realize the adjustment of the operating frequency of the transmission and reception control circuit suitable for the multi-nuclide. Wherein, C4 and L2 are in parallel resonance, the lambda/4 equivalent circuit is equivalent to a quarter-wave transmission line, and the impedance matching network is matched with the impedance of the coil end.

The coil interface can have a coil ID identification function, and the multi-core magnetic resonance transceiving control box can be automatically switched to a corresponding working frequency according to the type of the identified coil.

The magnetic resonance system can select the nuclear species for magnetic resonance imaging through the control interface and switch the multi-nuclear magnetic resonance transceiving control box to the corresponding working frequency.

The magnetic resonance system can acquire the working frequency of the multi-core magnetic resonance transceiving control box or the type of the connected coil through the control interface.

The control interface may switch transmit and receive functions according to a magnetic resonance system scan timing.

The coil interface can be a receiving and transmitting integrated coil interface or a one-transmitting and multi-receiving coil interface. The coil interface may contain a plurality of transmit or receive channels. As shown in fig. 3, a multi-nuclide transmitting and receiving control circuit with adjustable working frequency belongs to a transmitting and receiving control circuit of a transmitting and receiving integrated coil, and the transmitting and receiving of magnetic resonance radio frequency signals are completed by the transmitting and receiving integrated coil; the one-to-many receiving coil interface comprises an independent transmitting coil and a plurality of receiving coil interfaces.