阅读说明：本技术 用于核磁共振与放疗相融合的磁场制备结构、设备及系统 (Magnetic field preparation structure, equipment and system for fusion of nuclear magnetic resonance and radiotherapy ) 是由 袁双虎 李玮 王碧瑶 韩毅 李莉 刘宁 祝守慧 于金明 于 2020-05-13 设计创作，主要内容包括：本发明提供了一种用于核磁共振与放疗相融合的磁场制备结构、设备及系统,包括：通过超导体材料连接的两个螺线管,两个螺线管同心设置,所述螺线管由超导磁体构成；用于核磁共振与放疗相融合的加速度设备,包括直线加速器和磁体部分,所述磁体部分包括用于核磁共振与放疗相融合的磁场制备结构；所述直线加速器中发射粒子通过磁场制备结构的两个螺线管之间的空间通行；能够有效的使核磁共振与放疗相融合,使病人进行核磁共振可以直接进行放疗,缩短了病人的等待时间。(The invention provides a magnetic field preparation structure, equipment and a system for fusing nuclear magnetic resonance and radiotherapy, which comprises: two solenoids connected by a superconductor material, the two solenoids being concentrically arranged, the solenoids being constituted by superconducting magnets; the acceleration equipment for fusing nuclear magnetic resonance and radiotherapy comprises a linear accelerator and a magnet part, wherein the magnet part comprises a magnetic field preparation structure for fusing nuclear magnetic resonance and radiotherapy; the emitted particles in the linear accelerator pass through the space between two solenoids of the magnetic field preparation structure; can effectively fuse the nuclear magnetic resonance with the radiotherapy, so that the patient can directly carry out the radiotherapy by carrying out the nuclear magnetic resonance, and the waiting time of the patient is shortened.)

1. A magnetic field preparation structure for fusion of nuclear magnetic resonance and radiotherapy is characterized by comprising: two solenoids, concentrically arranged, connected by a superconductor material, are constituted by a superconducting magnet.

2. The magnetic field-producing structure of claim 1, further comprising a cooling tank for holding a cooling fluid, the cooling fluid being used to lower the solenoid and the superconductor material to a set temperature.

3. The magnetic field-producing structure of claim 1, wherein the two solenoids are a first solenoid and a second solenoid, respectively, with a set distance therebetween, the first solenoid and the second solenoid being connected by a superconductor material.

4. The magnetic field generating structure according to claim 1, wherein the set distance is a particle emitting range diameter of the linear accelerator.

5. The magnetic field producing structure according to claim 1, wherein the superconductor material is a niobium-titanium alloy having a Ti content in a mass fraction range of 46% to 50% and a superconducting transition temperature of 8 to 10K.

6. The magnetic field preparation structure of claim 1, wherein said superconducting magnet is wound as a solenoid from a plurality of turns of an air core coil of magnet material.

7. An acceleration apparatus for fusion of nuclear magnetic resonance with radiotherapy, comprising: a linear accelerator and a magnet part, the magnet part comprising the magnetic field preparation structure for fusion of nuclear magnetic resonance and radiotherapy according to any one of claims 1 to 6; the emitted particles in the linac pass through the space between two solenoids of a magnetic field preparation structure.

8. The accelerometer apparatus of claim 7, wherein the magnet portion further comprises gradient coils for producing gradient changes in X, Y, Z directions for selective layer positioning, and determining whether the superconducting magnet of the magnetic field preparation structure is properly positioned according to the spatially similar transformation.

9. The acceleration device of claim 7, wherein the magnet portion further comprises a body coil, a forward coil, and a backward coil; the body coil is used for transmitting a radio frequency field to excite the proton spin of the human body; and the forward coil and the backward coil are used for receiving echo signals to complete image reconstruction.

10. A radiotherapy system for fusion of nuclear magnetic resonance and radiotherapy is characterized by comprising: an acceleration apparatus in combination with mri and radiotherapy as claimed in any one of claims 7-9.

Technical Field

The invention relates to the technical field of medical equipment, in particular to a preparation structure of a high-energy uniform magnetic field in accelerator equipment for fusing nuclear magnetic resonance and radiotherapy, the accelerator equipment and a radiotherapy system.

Background

One of the major threats facing human health today is malignancy, and one of the major therapeutic modalities for malignancy is radiation therapy. The current radiotherapy can be used for radiotherapy after tumor simulation and positioning by using nuclear magnetic resonance images, and an important part of nuclear magnetic resonance instruments is preparation of high-energy uniform magnetic fields. The equipment for preparing high-energy magnetic field in nuclear magnetic resonance apparatus is characterized by that the wire is winded into main magnet, high-voltage electricity is passed through to produce current to prepare magnetic field, and the magnitude of the produced magnetic field can be controlled by controlling voltage magnitude.

However, after the tumor patient is positioned by nuclear magnetic resonance simulation, the tumor patient needs to wait for the establishment of a radiotherapy plan before positioning the tumor by means of the nuclear magnetic resonance image, but the tumor patient may have obvious volume and body changes and easily changes the position in a radiotherapy implementation period (usually 1 month), so that the existing radiotherapy has the problems of insufficient precision and inaccurate positioning, and the problem can be solved by the technology of monitoring and adjusting the radiotherapy plan in real time by online nuclear magnetic resonance.

One of the difficulties in the fusion of nmr and radiotherapy is the provision of a high energy, uniform magnetic field in the accelerator apparatus, which needs to reach 1.5T and avoid the effect on the emitted particles in the linear accelerator.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provide equipment for preparing a high-energy uniform magnetic field in accelerator equipment for fusing nuclear magnetic resonance and radiotherapy.

In order to achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, the present invention provides a magnetic field preparation structure for fusion of nuclear magnetic resonance and radiotherapy, comprising: two solenoids, concentrically arranged, connected by a superconductor material, are constituted by a superconducting magnet.

In a second aspect, the present invention also provides an acceleration apparatus for fusion of nuclear magnetic resonance with radiotherapy, comprising a linear accelerator and a magnet part, wherein the magnet part comprises the magnetic field preparation structure for fusion of nuclear magnetic resonance with radiotherapy as described in the first aspect; the emitted particles in the linac pass through the space between two solenoids of a magnetic field preparation structure.

In a third aspect, the present invention provides a radiotherapy system for combining nuclear magnetic resonance with radiotherapy, including: an acceleration apparatus in which nuclear magnetic resonance is combined with radiotherapy as described in the second aspect.

Compared with the prior art, the invention has the following beneficial effects:

1. the preparation structure of the high-energy uniform magnetic field can effectively fuse nuclear magnetic resonance with radiotherapy, so that a patient can directly carry out radiotherapy by carrying out nuclear magnetic resonance, and the waiting time of the patient is shortened.

2. The superconductor material can effectively reduce the influence of a high-energy magnetic field on particles emitted by a linear accelerator, the superconducting transition temperature of the niobium-titanium alloy adopted by the superconductor material is 8-10K, the temperature is also reduced to about 10K for supercooling the superconducting magnet, and the temperature requirement is easy to achieve.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

Fig. 1 is a schematic structural view of a magnet portion of an accelerator apparatus for combining nuclear magnetic resonance with radiation therapy according to embodiment 1 or embodiment 2 of the present invention;

FIG. 2 is a schematic view showing the action of the magnetic field in embodiment 1 or embodiment 2 of the present invention;

FIG. 3 is a schematic diagram of a magnetic field preparation structure according to embodiment 1 or embodiment 2 of the present invention;

FIG. 4 is a schematic diagram of the magnetic field generated in embodiment 1 or embodiment 2 of the present invention;

1, superconducting magnet; 2. niobium-titanium alloy.

The specific implementation mode is as follows:

the invention is further described with reference to the following figures and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.