CN113876315A - Peripheral circulation system magnetic resonance imaging method and device - Google Patents
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Abstract
The invention provides a magnetic resonance imaging method and a magnetic resonance imaging device for a peripheral circulation system, which relate to the technical field of medical images and comprise the following steps: and generating a rapid inversion recovery FIR pulse scanning sequence aiming at the peripheral circulation system, and then scanning and imaging the part to be detected of the peripheral circulation system by using a magnetic resonance imaging system based on the sequence. The method solves the technical problems of low imaging safety and great side effect of the conventional peripheral circulation system, and achieves the technical effects of improving the imaging safety of the peripheral circulation system and enlarging the application range.
Description
Technical Field
The invention relates to the technical field of medical imaging, in particular to a magnetic resonance imaging method and device of a peripheral circulation system.
Background
In clinical work, the imaging information of the circulation of peripheral blood vessels such as hands and feet is often required to be observed, but the peripheral blood vessels are very thin and difficult to directly observe, and if the medicine is used, allergic reaction can occur with a certain probability, and even the human body is damaged. At present, the imaging observation of peripheral vascular circulation such as hands and feet is mainly carried out by adopting an X-ray imaging method or a contrast agent method, and the radiation of X-rays to a human body and the adverse reaction of the contrast agent are difficult to avoid, so that the existing imaging method of the peripheral circulatory system has the problems of low safety and great side effect.
Disclosure of Invention
The invention aims to provide a magnetic resonance imaging method and a magnetic resonance imaging device for a peripheral circulation system, which are used for solving the technical problems of low safety and great side effect in the prior art.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
in a first aspect, an embodiment of the present invention provides a magnetic resonance imaging method of a peripheral circulation system, including: generating a fast inversion recovery FIR pulse scanning sequence for the peripheral circulation system; wherein the fast inversion recovery FIR pulse scan sequence comprises a plurality of radio frequency RF pulse scan sequences, each of the radio frequency RF pulse scan sequences comprising: a 90 ° excitation pulse and a first number of 180 ° echo pulses; the first number is an integer greater than or equal to 2; and the magnetic resonance imaging system recovers the FIR pulse scanning sequence based on the quick inversion to scan and image the part to be detected of the peripheral circulation system.
In some embodiments, the radio frequency RF pulse scan sequence includes the following time parameters: the time interval TR between two successive radio frequency RF pulses, the time interval TE between a 90 ° excitation pulse and a valid echo pulse and the relaxation time TI; wherein TR is 2900 ms; TE is 100 ms; TI is 150 ms.
In some embodiments, the step of generating a fast inversion recovery FIR pulse scan sequence for the peripheral circulatory system further comprises: the fat signal of the peripheral circulation system is suppressed to generate a vascular signal of the peripheral circulation system.
In some embodiments, the step of performing scan imaging on the to-be-detected portion of the peripheral circulation system by the magnetic resonance imaging system based on the fast inversion recovery FIR pulse scan sequence includes: sampling the blood vessel signal of the peripheral circulatory system by using the rapid inversion recovery FIR pulse scanning sequence to generate peripheral blood vessel sampling data; and obtaining magnetic resonance imaging of the peripheral circulatory system based on the peripheral blood vessel sampling data.
In some embodiments, the step of obtaining magnetic resonance imaging of the peripheral circulatory system based on the peripheral vascular sampling data comprises: reconstructing an image based on the peripheral blood vessel sampling data to obtain the magnetic resonance imaging of the peripheral circulatory system; the image reconstruction includes: transverse relaxation weight correction T2WI is applied to the peripheral blood vessel sampling data to obtain an image reconstruction result, namely a magnetic resonance image of the part to be detected.
In some embodiments, the parameters of the transverse relaxation weight correction T2WI described above include: the quantity value in the X-axis direction is increased by 200%, and the quantity value in the Y-axis direction is increased by 40%.
In a second aspect, an embodiment of the present invention provides a peripheral circulation system magnetic resonance imaging apparatus, including: the pulse scanning sequence generating module is used for generating a rapid inversion recovery FIR pulse scanning sequence aiming at the peripheral circulation system; wherein the fast inversion recovery FIR pulse scan sequence comprises a plurality of radio frequency RF pulse scan sequences, each of the radio frequency RF pulse scan sequences comprising: a 90 ° excitation pulse and a first number of 180 ° echo pulses; the first number is an integer greater than or equal to 2; and the imaging module is used for scanning and imaging the part to be detected of the peripheral circulation system based on the rapid inversion recovery FIR pulse scanning sequence.
In some embodiments, the radio frequency RF pulse scan sequence includes the following time parameters: the time interval TR between two successive radio frequency RF pulses, the time interval TE between a 90 ° excitation pulse and a valid echo pulse and the relaxation time TI; wherein TR is 2900 ms; TE is 100 ms; TI is 150 ms.
In a third aspect, an embodiment of the present invention provides an electronic device, including a memory and a processor, where the memory stores a computer program operable on the processor, and the processor implements the steps of the method according to any one of the first aspect when executing the computer program.
In a fourth aspect, embodiments of the present invention provide a computer-readable storage medium storing machine executable instructions that, when invoked and executed by a processor, cause the processor to perform the method of any of the first aspects.
The invention provides a magnetic resonance imaging method and a magnetic resonance imaging device for a peripheral circulation system, wherein the method comprises the following steps: the method comprises the steps of firstly generating a rapid inversion recovery FIR pulse scanning sequence aiming at a peripheral circulation system, and then utilizing a magnetic resonance imaging system to scan and image a part to be detected of the peripheral circulation system based on the sequence, thereby avoiding the side effect caused by using a contrast medium or X-ray imaging, solving the technical problems of low imaging safety and great side effect of the existing peripheral circulation system, and achieving the technical effects of improving the imaging safety of the peripheral circulation system and expanding the application range.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic flow chart of a magnetic resonance imaging method of a peripheral circulation system according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating blood vessel imaging of a foot and a hand based on a magnetic resonance imaging method of a peripheral circulation system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a fast inversion recovery FIR pulse scanning sequence according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a magnetic resonance imaging apparatus of a peripheral circulation system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In clinical work, the image information of the circulation of peripheral blood vessels such as hands and feet is often required to be observed, but because the peripheral blood vessels are very thin, direct observation is difficult, and if the medicine is used, allergic reaction can occur with a certain probability, and even the human body is damaged. At present, the imaging observation of peripheral vascular circulation such as hands and feet is mainly carried out by adopting an X-ray imaging method or a contrast agent method, but the X-ray has radiation to human bodies, and particularly has great adverse effect on the growth and development of pregnant women and children; most of the clinically used contrast agents are iodine agents and gadolinium agents, and the two drugs have mild, moderate and severe adverse reactions clinically, and some severe patients also have death reports. Therefore, the existing imaging method of the peripheral circulation system is difficult to avoid the radiation of X-rays to a human body, the adverse reaction of a contrast agent and the like, and has the problems of low safety and great side effect.
Based on this, the embodiment of the invention provides a magnetic resonance imaging method and device for a peripheral circulation system, so as to alleviate the technical problems of low safety and great side effects in the prior art.
For the understanding of the present embodiment, first, a detailed description is given of a magnetic resonance imaging method of a peripheral circulation system disclosed in the embodiment of the present invention, referring to a flowchart of the magnetic resonance imaging method of a peripheral circulation system shown in fig. 1, the method may be executed by an electronic device, and mainly includes the following steps S120 to S140:
s120: generating a fast inversion recovery FIR pulse scanning sequence for the peripheral circulation system;
wherein the pulsed scan sequence is generated by a radio frequency amplifier loaded in the magnetic resonance apparatus.
The fast inversion recovery FIR pulse scan sequence comprises a plurality of radio frequency RF pulse scan sequences, each radio frequency RF pulse scan sequence comprising: a 90 ° excitation pulse and a first number of 180 ° echo pulses; the first number is an integer greater than or equal to 2.
Wherein the first number may be n, wherein 2 ≦ n ≦ echo factor, the value of the echo factor n depending on the repetition time and the time setting of the echo interval, with the aim of achieving an optimal display contrast in as short a time as possible.
As a specific example, the radio frequency RF pulse scan sequence may include the following time parameters: the time interval TR between two successive radio frequency RF pulses, the time interval TE between a 90 ° excitation pulse and a valid echo pulse and the relaxation time TI; wherein TR is 2900 ms; TE is 100 ms; TI is 150 ms. The end result of the above time parameters is that a relative maximum contrast is achieved in as short a time as possible, wherein it is ensured that the weight of the transverse relaxation weight correction T2WI suppresses background noise while preserving anatomical details.
S140: the magnetic resonance imaging system recovers an FIR pulse scanning sequence based on the rapid inversion, and scans and images the part to be detected of the peripheral circulation system.
Wherein the magnetic resonance imaging system can be a superconducting magnetic resonance imaging system with the temperature of more than 1.5T; the site to be examined mainly includes blood vessels of the peripheral circulatory system including the extremities and the like (see fig. 2 for a blood vessel imaging of the feet and hands based on the magnetic resonance imaging method of the peripheral circulatory system).
The magnetic resonance imaging method of the peripheral circulatory system provided by the embodiment can enhance the signals of the blood vessels of the parts such as hands and feet instead of inhibiting the blood vessel signals of the parts, and can fully display the blood vessels with relatively thin periphery clearly.
The embodiment of the application provides a magnetic resonance imaging method of a peripheral circulation system, which comprises the following steps: the method comprises the steps of firstly generating a rapid inversion recovery FIR pulse scanning sequence aiming at a peripheral circulation system, and then utilizing a magnetic resonance imaging system to scan and image a part to be detected of the peripheral circulation system based on the sequence, thereby avoiding the side effect caused by using a contrast medium or X-ray imaging, solving the technical problems of low imaging safety and great side effect of the existing peripheral circulation system, and achieving the technical effects of improving the imaging safety of the peripheral circulation system and expanding the application range.
In an embodiment, the method for magnetic resonance imaging of the peripheral circulation system after generating the fast inversion recovery FIR pulse scan sequence for the peripheral circulation system in step S120 may further include: fat signals of the peripheral circulatory system are suppressed to generate vascular signals of the peripheral circulatory system.
In an embodiment, the step S140 of performing scanning imaging on the to-be-detected portion of the peripheral circulation system by the magnetic resonance imaging system based on the fast inversion recovery FIR pulse scanning sequence includes:
firstly, sampling a blood vessel signal of a peripheral circulatory system by using a rapid inversion recovery FIR pulse scanning sequence to generate peripheral blood vessel sampling data;
magnetic resonance imaging of the peripheral circulatory system is then obtained based on the peripheral vascular sampling data.
Further, the step of obtaining magnetic resonance imaging of the peripheral circulatory system based on the peripheral vascular sampling data comprises:
and reconstructing an image based on the peripheral blood vessel sampling data to obtain the magnetic resonance imaging of the peripheral circulatory system.
Wherein the image reconstruction comprises: transverse relaxation weight correction T2WI is applied to the peripheral blood vessel sampling data, and an image reconstruction result, namely a magnetic resonance image of the part to be detected is obtained.
As a specific example, the parameters of the transverse relaxation weight correction T2WI include: the quantity value in the X-axis direction is increased by 200%, and the quantity value in the Y-axis direction is increased by 40%.
Referring to fig. 3, a schematic diagram of a fast inversion recovery FIR pulse scanning sequence is shown. The pulse scanning sequence diagram includes 5 time axes from top to bottom, which are respectively: radio Frequency (RF), slice selection gradient magnetic field (Gs), phase encoding gradient magnetic field (Gp), frequency encoding gradient magnetic field (Gr), echo Signal (MR Signal).
The pulse amplifier generates an initial pulse and a plurality of radio frequency RF pulse scanning sequences, and the direction of the initial pulse is parallel to the direction (Bo direction) of a human body (a part to be detected); the radio frequency RF pulse scan sequence comprises one 90 ° excitation pulse and n 180 ° echo pulses;
after the initial pulse (i.e. the first 180 DEG inversion pulse), the initial signal M is inverted to the opposite direction of the direction Bo parallel to the human body, and after a period of relaxation time (TI: 140-200 ms), that is, when the fat signal just relaxes from the negative phase to the zero point on the XY plane, a 90 DEG excitation pulse is applied, the current signal M 'on the negative Z axis is applied to the XY plane, the longitudinal relaxation time T1 of the fat tissue does not exist in the current signal M', and the FIR is the longitudinal relaxation time T1 of the tissues except the fat tissue (the transverse relaxation time T2 does not see the signals of water and the tissues containing water clearly).
However, since the FIR is not detected right after the energy burst of the 90 ° excitation pulse, 180 ° complex phase pulse is applied after the effective echo time TE/2 to form the transverse relaxation time T2 of other tissues, so that the current signal M' out of phase on the XY plane is re-phased to generate the FIR. The FIR at this time is already TE time after the 90 pulse, so the transverse relaxation time T2 of other tissues is added to the FIR at this time. The signals in this sequence are composed of the longitudinal relaxation time T1 and the transverse relaxation time T2 of tissues other than fat.
The 180-degree complex phase pulse has the function of changing the precession directions of all protons in the XY plane so that the dephased protons reach phase reunion. The pulse amplifier firstly transmits a 90-degree radio frequency pulse, then transmits a 180-degree pulse at intervals of tens of milliseconds, and detects the strength of an echo signal tens of milliseconds after the 180-degree pulse, so that the scanning time is shorter, the image quality is clearer, and the weight of T2 is higher.
The embodiment of the application provides a magnetic resonance imaging method of a peripheral circulation system, which generates a rapid inversion recovery FIR pulse scanning sequence aiming at the peripheral circulation system, can noninvasively observe images of the peripheral circulation system by using the sequence technology under magnetic resonance, and can be used for preoperative and postoperative evaluation of severed finger replantation, clinical evaluation of lesions such as diabetic foot necrosis, gangrene and the like.
The method has the characteristics of no radiation, no need of using a contrast medium (even can be applied to pregnant women with the gestational period of more than 16 weeks), extremely high safety and reliability, high image definition, and the like, and meets clinical requirements.
An embodiment of the present invention further provides a peripheral circulation system magnetic resonance imaging apparatus, referring to a schematic structural diagram of a peripheral circulation system magnetic resonance imaging apparatus shown in fig. 4, the apparatus includes:
a pulse scan sequence generation module 410 for generating a fast inversion recovery FIR pulse scan sequence for the peripheral circulation system; wherein, the fast inversion recovery FIR pulse scanning sequence includes a plurality of radio frequency RF pulse scanning sequences, each radio frequency RF pulse scanning sequence includes: a 90 ° excitation pulse and a first number of 180 ° echo pulses; the first number is an integer greater than or equal to 2;
and the imaging module 420 is configured to perform scanning imaging on the to-be-detected part of the peripheral circulation system based on the fast inversion recovery FIR pulse scanning sequence.
Wherein the radio frequency RF pulse scan sequence comprises the following time parameters: the time interval TR between two successive radio frequency RF pulses, the time interval TE between a 90 ° excitation pulse and a valid echo pulse and the relaxation time TI; wherein TR is 2900 ms; TE is 100 ms; TI is 150 ms.
In an embodiment, the pulse scanning sequence generating module may further include: and a signal generation unit which can be used for suppressing the fat signal of the peripheral circulation system and generating the blood vessel signal of the peripheral circulation system.
In one embodiment, the imaging module may further include:
the sampling unit is used for sampling the blood vessel signals of the peripheral circulatory system by using a rapid inversion recovery FIR pulse scanning sequence to generate peripheral blood vessel sampling data;
an imaging unit for obtaining magnetic resonance imaging of the peripheral circulatory system based on the peripheral vascular sampling data.
In an embodiment, the imaging unit is further configured to: reconstructing an image based on the peripheral blood vessel sampling data to obtain the magnetic resonance imaging of the peripheral circulatory system; the image reconstruction includes: transverse relaxation weight correction T2WI is applied to the peripheral blood vessel sampling data, and an image reconstruction result, namely a magnetic resonance image of the part to be detected is obtained.
Wherein, the parameters of the transverse relaxation weight correction T2WI include: the quantity value in the X-axis direction is increased by 200%, and the quantity value in the Y-axis direction is increased by 40%.
The embodiment of the application provides a magnetic resonance imaging method and a magnetic resonance imaging device for a peripheral circulation system, wherein the method comprises the following steps: the method comprises the steps of firstly generating a rapid inversion recovery FIR pulse scanning sequence aiming at a peripheral circulation system, and then utilizing a magnetic resonance imaging system to scan and image a part to be detected of the peripheral circulation system based on the sequence, thereby avoiding the side effect caused by using a contrast medium or X-ray imaging, solving the technical problems of low imaging safety and great side effect of the existing peripheral circulation system, and achieving the technical effects of improving the imaging safety of the peripheral circulation system and expanding the application range.
The magnetic resonance imaging device of the peripheral circulation system provided by the embodiment of the application can be specific hardware on the device, or software or firmware installed on the device, and the like. The device provided by the embodiment of the present application has the same implementation principle and technical effect as the foregoing method embodiments, and for the sake of brief description, reference may be made to the corresponding contents in the foregoing method embodiments where no part of the device embodiments is mentioned. It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the foregoing systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. The magnetic resonance imaging apparatus of the peripheral circulation system provided by the embodiment of the present application has the same technical features as the magnetic resonance imaging method of the peripheral circulation system provided by the above embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
The embodiment of the application further provides an electronic device, and specifically, the electronic device comprises a processor and a storage device; the storage means has stored thereon a computer program which, when executed by the processor, performs the method of any of the above described embodiments.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application, where the electronic device 400 includes: a processor 40, a memory 41, a bus 42 and a communication interface 43, wherein the processor 40, the communication interface 43 and the memory 41 are connected through the bus 42; the processor 40 is arranged to execute executable modules, such as computer programs, stored in the memory 41.
The Memory 41 may include a high-speed Random Access Memory (RAM) and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the system and at least one other network element is realized through at least one communication interface 43 (which may be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network, etc. may be used.
The bus 42 may be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 4, but that does not indicate only one bus or one type of bus.
The memory 41 is used for storing a program, the processor 40 executes the program after receiving an execution instruction, and the method executed by the apparatus defined by the flow process disclosed in any of the foregoing embodiments of the present invention may be applied to the processor 40, or implemented by the processor 40.
The processor 40 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 40. The Processor 40 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory 41, and the processor 40 reads the information in the memory 41 and completes the steps of the method in combination with the hardware thereof.
Corresponding to the method, the embodiment of the application also provides a computer readable storage medium, wherein the computer readable storage medium stores machine executable instructions, and when the computer executable instructions are called and executed by a processor, the computer executable instructions cause the processor to execute the steps of the method.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments provided in the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, an electronic device, or a network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of magnetic resonance imaging of a peripheral circulation system, comprising:
generating a fast inversion recovery FIR pulse scanning sequence for the peripheral circulation system;
wherein the fast inversion recovery FIR pulse scan sequence comprises a plurality of radio frequency RF pulse scan sequences, each of the radio frequency RF pulse scan sequences comprising: a 90 ° excitation pulse and a first number of 180 ° echo pulses; the first number is an integer greater than or equal to 2;
and the magnetic resonance imaging system performs scanning imaging on the part to be detected of the peripheral circulation system based on the rapid inversion recovery FIR pulse scanning sequence.
2. A method of magnetic resonance imaging of the peripheral circulation system according to claim 1, characterized in that the radio frequency RF pulse scan sequence comprises the following time parameters: the time interval TR between two successive radio frequency RF pulses, the time interval TE between a 90 ° excitation pulse and a valid echo pulse and the relaxation time TI; wherein TR is 2900 ms; TE is 100 ms; TI is 150 ms.
3. The method of peripheral circulation magnetic resonance imaging according to claim 2, wherein the step of generating a fast inversion recovery FIR pulse scan sequence for peripheral circulation is followed by further comprising:
and inhibiting the fat signal of the peripheral circulation system to generate a blood vessel signal of the peripheral circulation system.
4. The peripheral circulation system magnetic resonance imaging method according to claim 3, wherein the step of performing scanning imaging on the to-be-detected part of the peripheral circulation system by the magnetic resonance imaging system based on the fast inversion recovery FIR pulse scanning sequence comprises:
sampling the blood vessel signals of the peripheral circulatory system by using the rapid inversion recovery FIR pulse scanning sequence to generate peripheral blood vessel sampling data;
obtaining magnetic resonance imaging of the peripheral circulatory system based on the peripheral vascular sampling data.
5. The method of peripheral circulation magnetic resonance imaging according to claim 4, wherein the step of obtaining magnetic resonance imaging of the peripheral circulation based on the peripheral vascular sampling data comprises:
performing image reconstruction based on the peripheral blood vessel sampling data to obtain magnetic resonance imaging of the peripheral circulatory system;
the image reconstruction includes: transverse relaxation weight correction T2WI is applied to the peripheral blood vessel sampling data, and an image reconstruction result, namely a magnetic resonance image of the part to be detected is obtained.
6. The magnetic resonance imaging method of the peripheral circulation system of claim 5, wherein the parameters of the transverse relaxation weight correction T2WI include: the quantity value in the X-axis direction is increased by 200%, and the quantity value in the Y-axis direction is increased by 40%.
7. A peripheral circulation system magnetic resonance imaging apparatus, comprising:
the pulse scanning sequence generating module is used for generating a rapid inversion recovery FIR pulse scanning sequence aiming at the peripheral circulation system; wherein the fast inversion recovery FIR pulse scan sequence comprises a plurality of radio frequency RF pulse scan sequences, each of the radio frequency RF pulse scan sequences comprising: a 90 ° excitation pulse and a first number of 180 ° echo pulses; the first number is an integer greater than or equal to 2;
and the imaging module is used for scanning and imaging the part to be detected of the peripheral circulation system based on the rapid inversion recovery FIR pulse scanning sequence.
8. The peripheral circulation system MRI apparatus of claim 7, wherein the radio frequency RF pulse scan sequence comprises the following temporal parameters: the time interval TR between two successive radio frequency RF pulses, the time interval TE between a 90 ° excitation pulse and a valid echo pulse and the relaxation time TI; wherein TR is 2900 ms; TE is 100 ms; TI is 150 ms.
9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program operable on the processor, and wherein the processor implements the steps of the method of any of claims 1 to 6 when executing the computer program.
10. A computer readable storage medium having stored thereon machine executable instructions which, when invoked and executed by a processor, cause the processor to execute the method of any of claims 1 to 6.
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| CN104856677A (en) * | 2015-06-14 | 2015-08-26 | 西安交通大学医学院第一附属医院 | Magnetic resonance imaging method of magnetization transfer and level choose inversion recovery combined pre-pulse |
| CN111265206A (en) * | 2020-01-22 | 2020-06-12 | 上海联影医疗科技有限公司 | Magnetic resonance blood vessel imaging method, device and equipment |
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| CN104856677A (en) * | 2015-06-14 | 2015-08-26 | 西安交通大学医学院第一附属医院 | Magnetic resonance imaging method of magnetization transfer and level choose inversion recovery combined pre-pulse |
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