WO2018080291A1 - Radio frequency coil for magnetic resonance imaging - Google Patents
Radio frequency coil for magnetic resonance imaging Download PDFInfo
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- WO2018080291A1 WO2018080291A1 PCT/KR2017/012200 KR2017012200W WO2018080291A1 WO 2018080291 A1 WO2018080291 A1 WO 2018080291A1 KR 2017012200 W KR2017012200 W KR 2017012200W WO 2018080291 A1 WO2018080291 A1 WO 2018080291A1
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- radio frequency
- magnetic resonance
- dipole antenna
- frequency coil
- resonance imaging
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/34007—Manufacture of RF coils, e.g. using printed circuit board technology; additional hardware for providing mechanical support to the RF coil assembly or to part thereof, e.g. a support for moving the coil assembly relative to the remainder of the MR system
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
- G01R33/3628—Tuning/matching of the transmit/receive coil
- G01R33/3635—Multi-frequency operation
Definitions
- the present invention relates to a radio frequency coil for a magnetic resonance imaging apparatus, and more particularly, to a radio frequency coil technology capable of length adjustment and having a plurality of resonant frequencies used in a magnetic resonance imaging apparatus.
- the magnetic resonance imaging apparatus photographs a cross section of a human body using a nuclear magnetic resonance phenomenon. Since atomic nuclei such as hydrogen, phosphorus, sodium, and carbon isotopes in the human body have their own rotor magnetic constants due to nuclear magnetic resonance, the magnetization vectors of the nuclei aligned in the direction of the main magnetic field ( A high frequency is applied to a magnetization vector using a radio frequency (RF) coil, and the radio frequency coil receives a magnetic resonance signal generated by rearranging the magnetization vector in a vertical plane due to the frequency resonance. Can be obtained.
- RF radio frequency
- the radio frequency coil may include a radio frequency antenna capable of transmitting a high frequency and receiving a magnetic resonance signal to resonate the magnetization vector. Resonating the magnetization vector with one RF coil (RF antenna) (RF transmission mode) and receiving a magnetic resonance signal (RF reception mode) may be performed together. Alternatively, the RF transmission mode and the RF reception mode may be separately performed using two RF coils dedicated to the RF transmission mode and two RF coils dedicated to the RF reception mode.
- a coil that performs both transmission and reception modes with one coil is called a transmission / reception (Tx / Rx) coil, and a transmission-only coil is called a transmission coil and a reception-only coil is called a reception coil.
- RF transmitting coils are installed inside the main magnet and are made of birdcage on a circular or circular frame sized to fit the human body.
- the RF receiving coil is located in a portion adjacent to the human body and is generally manufactured in various forms according to the shape of the body part.
- the radio frequency coils used in the magnetic resonance imaging system are mainly loop type coils.
- the uniformity of the magnetic field B1 generated by the coil in the ultra high magnetic field is not constant, and thus the frequency of use of a traveling wave coil (dipole antenna) having a uniform magnetic field uniformity in the ultra high magnetic field is caused. Is increasing.
- radio frequency coils used in magnetic resonance imaging systems are designed primarily to have a specific frequency for a single nuclide. Different nuclides have different Larmor frequencies within the same magnetic field strength, which is proportional to the gyromagnetic ratio. As a result, when experimenting with various nuclides, there was a problem in that coils having a specific frequency were alternately obtained.
- the conventional method to solve this problem is to arrange the coils having the resonant frequencies of different nuclides in spatial overlap. This method was mainly used, but this caused a problem of spatial constraints. Therefore, the conventional traveling wave coil used a traveling wave coil in the form of a meander line and a spiral, which is used by bending a dipole antenna, but this also caused a inconvenience when experimenting with various nuclides because the length was physically modified.
- the present invention has been made in view of the above problems, and an object thereof is to provide a radio frequency coil whose length can be arbitrarily adjusted.
- another object of the present invention is to provide a radio frequency coil that can obtain a plurality of nuclide signals using a single coil, which can have a plurality of resonant frequencies through a single coil.
- a radio frequency coil for magnetic resonance imaging includes a radio frequency coil for magnetic resonance imaging, the dipole antenna having a specific resonance frequency according to a length, and an electrical switch located at both sides of the dipole antenna. It is characterized by doing.
- the apparatus further includes a power supply unit for supplying a voltage to the electrical switch to control on-off of the electrical switch, wherein the electrical switches respectively positioned at both sides of the electrical switch may be separated from the center of the dipole antenna by a specific distance. .
- each of the electrical switches located on both sides of the plurality of electrical switches located on the left side of the dipole antenna and the plurality of electrical switches located on the left side of the plurality of electrical switches located on the left side of the dipole antenna may be an electrical switch.
- the dipole antenna may be a dipole antenna formed of any one of a meander line or a spiral.
- the radio frequency coil may be a planar multi-channel magnetic resonance image coil having a plurality of one configurations, wherein the plurality of configurations are arranged by using the dipole antenna and the electrical switches positioned at both sides of the dipole antenna.
- the radio frequency coil for magnetic resonance imaging of a cylinder multi-channel type is characterized in that one configuration is arranged in a plurality of electrical switches located on both sides of the dipole antenna and the dipole antenna.
- a single radio frequency coil can be arbitrarily adjusted in length by using an electrical switch and a direct current in an ultra-high magnetic field, and a signal of a plurality of radionuclides can be obtained using a single radio frequency coil. This has the effect of having multiple resonant frequencies in a single radio frequency coil.
- FIG. 1 is a block diagram of a radio frequency coil for magnetic resonance imaging according to an embodiment of the present invention.
- FIG. 2 is a block diagram of a radio frequency coil for a magnetic resonance image further including a power supply according to an embodiment of the present invention.
- FIG. 3 is a block diagram of a magnetic resonance imaging radio frequency coil having a plurality of electrical switches on both sides of the dipole antenna according to an embodiment of the present invention.
- FIG. 4 is a diagram illustrating an example of a radio frequency coil for magnetic resonance imaging in a meander line or spiral form according to an embodiment of the present invention.
- FIG. 5 is a diagram illustrating an example of a radio frequency coil for magnetic resonance imaging in a planar multichannel type according to an embodiment of the present invention.
- FIG. 6 is a diagram illustrating an example of a radio frequency coil for magnetic resonance imaging of a cylinder multichannel type according to an embodiment of the present invention.
- FIG. 1 is a configuration of a radio frequency coil (1) for a magnetic resonance image according to an embodiment of the present invention
- Figure 2 is a configuration of a radio frequency coil for a magnetic resonance image further including a power supply according to an embodiment of the present invention It is also. This will be described with reference.
- Magnetic resonance imaging radio frequency coil 1 includes a dipole antenna 10 and the electrical switch 20, the magnetic resonance imaging radio frequency coil 2 according to an aspect of the present invention ) Includes a dipole antenna 10, an electrical switch 20, and a power supply unit 30.
- a general dipole antenna has a characteristic in which tuning of a frequency is determined by length. That is, if the length of the dipole antenna can be adjusted, it can be changed to a specific resonance frequency. Therefore, the dipole antenna 10 may have a specific resonance frequency according to the length, and thus the length of the radio frequency coil for magnetic resonance imaging may be adjusted.
- the electrical switch 20 is a general electrical switch and may be disposed on both sides of the dipole antenna 10, in which case they may be arranged at specific intervals or in a specific arrangement, and in one embodiment the same arrangement, the same arrangement, symmetry or asymmetry. Can be located as an enemy.
- the power supply of the electrical switch 20 is turned on to have the effect of extending the length of the dipole antenna 10, when the power is off has the effect of reducing the length of the dipole antenna 10.
- the electrical switch 20 may be a pin diode in one embodiment.
- the power supply unit 30 serves to control the on-off of the electrical switch 20 by supplying power to the electrical switch 20. As described above, the electrical switch 20 is turned on by the power supply of the power supply unit 30. May be adjusted so that the total length of the dipole antenna 10 may be extended or shortened.
- the radio frequency coil 2 for the magnetic resonance image including the dipole antenna 10 is included.
- the total length is extended to be equal to 201, and when the power of the electrical switch 20 is turned off due to the interruption of the power supply of the power supply unit 30 (DC off), the radio frequency coil for magnetic resonance imaging including the dipole antenna 10 (2) ) May be reduced to equal 202.
- FIG. 3 is a block diagram of a magnetic resonance imaging radio frequency coil 3 having a plurality of electrical switches on both sides of a dipole antenna according to an embodiment of the present invention.
- the dipole antenna 10 is the same as described above, and may be referred to as an electrical switch 21 through a plurality of electrical switches arranged on the left side of the dipole antenna 10 and a plurality of electrical switches arranged on the right side. Is the same as the electrical switch 20 described above.
- the electrical switch 21 may also be a pin diode in one embodiment.
- the power supply unit 31 may also have a plurality of grounds GND1 and GND2 and DC power supplies Vcc1 and Vcc2 and perform the same function as the power supply unit 30 described above.
- the electrical switch 21 is arranged on both sides of the dipole antenna 10, so that the radio frequency coil 2 for magnetic resonance imaging is easier to control the length than the radio frequency coil 1 for magnetic resonance imaging described above. It can be tuned to have a resonant frequency.
- FIG. 4 is a view showing an example of a radio frequency coil for magnetic resonance imaging in a meander line or spiral form according to an embodiment of the present invention.
- the proposed method is applied as an embodiment of the present invention by applying the above-described method to the existing dipole antenna (a-1) and the existing spiral-type dipole antenna (b-1). Radio frequency for magnetic resonance imaging in the line
- the coil (a-2) and the spiral type radio frequency coil (b-2) for magnetic resonance imaging can be implemented (on the left side. Means the same as on the right)
- FIG. 5 is a view showing an example of a radio frequency coil for a planar multi-channel magnetic resonance image according to an embodiment of the present invention
- Figure 6 is a magnetic resonance image for a cylinder multi-channel type according to an embodiment of the present invention
- a radio frequency coil a plurality of radio frequency coils and cylinders for magnetic resonance imaging in a planar multichannel type are utilized by utilizing a plurality of the above-described dipole antennas 10, electrical switches 20 and 21, and power supply units 30 and 31, respectively.
- Multi-channel radio frequency coils for magnetic resonance imaging can also be implemented.
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Abstract
Description
본 발명은 자기공명 영상장치용 라디오 주파수 코일에 관한 것으로, 보다 상세하게는 길이 조정이 가능하며, 자기공명 영상장치에서 사용되는 다수개의 공진 주파수를 가질 수 있는 라디오 주파수 코일 기술에 관한 것이다.The present invention relates to a radio frequency coil for a magnetic resonance imaging apparatus, and more particularly, to a radio frequency coil technology capable of length adjustment and having a plurality of resonant frequencies used in a magnetic resonance imaging apparatus.
핵자기 공명(Nuclear Magnetic Resonance: NMR) 현상을 이용하는 자기공명 시스템으로서 자기공명영상(Magnetic Resonance Imaging: MRI) 장치, 자기공명분광(Magnetic Resonance Spectroscopy: MRS) 장치 등이 알려져 있다. 자기공명영상장치는 핵자기 공명 현상을 이용하여 인체의 단면을 촬영한다. 인체 내에 존재하는 수소, 인, 나트륨, 탄소동위원소 등의 원자핵은 핵자기 공명현상에 의해 각기 고유한 회전자계상수를 가지므로, 주자기장(main magnetic field)의 방향으로 정렬된 원자핵의 자화벡터(magnetization vector)에 라디오주파수(RF,radio frequency) 코일을 이용하여 고주파를 인가하고, 주파수 공명으로 인해 수직평면으로 자화벡터가 재정렬되면서 발생되는 자기공명 신호를 라디오 주파수 코일이 수신함으로써 인체의 단면 영상을 획득할 수 있다. As magnetic resonance systems using Nuclear Magnetic Resonance (NMR), magnetic resonance imaging (MRI) devices, magnetic resonance spectroscopy (MRS) devices and the like are known. The magnetic resonance imaging apparatus photographs a cross section of a human body using a nuclear magnetic resonance phenomenon. Since atomic nuclei such as hydrogen, phosphorus, sodium, and carbon isotopes in the human body have their own rotor magnetic constants due to nuclear magnetic resonance, the magnetization vectors of the nuclei aligned in the direction of the main magnetic field ( A high frequency is applied to a magnetization vector using a radio frequency (RF) coil, and the radio frequency coil receives a magnetic resonance signal generated by rearranging the magnetization vector in a vertical plane due to the frequency resonance. Can be obtained.
라디오 주파수 코일은 자화벡터를 공명시키기 위하여 고주파를 송신하고 자기공명 신호를 수신할 수 있는 라디오주파수안테나를 포함할 수 있다. 한 개의 RF 코일(RF 안테나)로 자화벡터를 공명시키는 것(RF 송신 모드)과 자기공명 신호를 수신하는 것(RF 수신 모드)을 같이 수행할 수도 있다. 또는, RF 송신 모드 전용의 RF 코일과 RF 수신 모드 전용의 RF코일 두 개를 각기 따로 사용하여 RF 송신 모드와 RF 수신 모드를 별개로 수행할 수도 있다. 한 개의 코일로 송신 및 수신모드를 다 수행하는 코일을 송수신(Tx/Rx) 코일이라 하며, 송신 전용의 코일을 송신 코일, 수신 전용의 코일을 수신 코일이라 한다. 대부분의 RF 송신 코일은 주자석의 내측에 설치되며, 인체가 들어갈 수 있는 크기의 원형 혹은 원형 프레임 위에 새장(birdcage)형으로 만들어진다. 반면, RF 수신코일은 인체에 인접한 부분에 위치하며 인체의 부위별 형상에 따라 다양한 형태로 제작되는 것이 일반적이다.The radio frequency coil may include a radio frequency antenna capable of transmitting a high frequency and receiving a magnetic resonance signal to resonate the magnetization vector. Resonating the magnetization vector with one RF coil (RF antenna) (RF transmission mode) and receiving a magnetic resonance signal (RF reception mode) may be performed together. Alternatively, the RF transmission mode and the RF reception mode may be separately performed using two RF coils dedicated to the RF transmission mode and two RF coils dedicated to the RF reception mode. A coil that performs both transmission and reception modes with one coil is called a transmission / reception (Tx / Rx) coil, and a transmission-only coil is called a transmission coil and a reception-only coil is called a reception coil. Most RF transmitting coils are installed inside the main magnet and are made of birdcage on a circular or circular frame sized to fit the human body. On the other hand, the RF receiving coil is located in a portion adjacent to the human body and is generally manufactured in various forms according to the shape of the body part.
자기공명영상시스템에서 사용되는 라디오 주파수 코일은 주로 루프형태의 코일이 사용된다. 루프 형태 코일의 경우 초고자장에서 코일이 만들어내는 자기장(B1)의 균질도(Uniformity)가 일정하지 않은 문제점을 가지고 있으며 이에 초고자장에서 일정한 자기장의 균질도를 가지는 진행파 코일(다이폴 안테나)의 사용빈도수가 증가하고 있다. 또한 자기공명 영상시스템에서 사용되는 라디오 주파수 코일은 주로 단일의 핵종에 대한 특정 주파수를 가지도록 설계되어 있다. 다양한 핵종은 같은 자기장 세기 내에서 서로 다른 Larmor frequency를 가지고 있으며 이는 Gyromagnetic ratio에 비례한다. 결국 기존에 다양한 핵종에 대한 실험을 할 경우 특정 주파수를 가지는 코일을 번갈아가며 획득을 해야 하는 문제점이 있었다. 각각 코일을 번갈아 가며 획득할 시에는 기구적인 움직임으로 인하여 정확한 같은 위치의 영상을 획득하지 못하는 문제점이 수반되었으며, 이를 해결하기 위한 기존 방법은 각각 다른 핵종의 공진 주파수를 가지는 코일을 공간적으로 중첩하여 배열하는 방법이 주로 사용되었으나, 이는 공간적인 제약이 뒤따르는 문제가 발생하였다. 따라서 기존의 진행파 코일은 다이폴 안테나를 구부려서 사용하는 민더라인, 스파이럴 형태의 진행파 코일을 사용하였으나 이 또한 물리적으로 길이를 변형한 경우이므로 다양한 핵종에 대한 실험을 할 경우 불편을 야기하였다.The radio frequency coils used in the magnetic resonance imaging system are mainly loop type coils. In the case of the loop type coil, the uniformity of the magnetic field B1 generated by the coil in the ultra high magnetic field is not constant, and thus the frequency of use of a traveling wave coil (dipole antenna) having a uniform magnetic field uniformity in the ultra high magnetic field is caused. Is increasing. In addition, radio frequency coils used in magnetic resonance imaging systems are designed primarily to have a specific frequency for a single nuclide. Different nuclides have different Larmor frequencies within the same magnetic field strength, which is proportional to the gyromagnetic ratio. As a result, when experimenting with various nuclides, there was a problem in that coils having a specific frequency were alternately obtained. When acquiring each coil alternately, it was accompanied by the problem of failing to acquire the exact same position due to the mechanical movement. The conventional method to solve this problem is to arrange the coils having the resonant frequencies of different nuclides in spatial overlap. This method was mainly used, but this caused a problem of spatial constraints. Therefore, the conventional traveling wave coil used a traveling wave coil in the form of a meander line and a spiral, which is used by bending a dipole antenna, but this also caused a inconvenience when experimenting with various nuclides because the length was physically modified.
[선행기술문헌][Preceding technical literature]
[특허문헌][Patent Documents]
한국공개특허공보 제10-2011-0049844호 (다중 공명 라디오 주파수 코일)Korean Laid-Open Patent Publication No. 10-2011-0049844 (Multi Resonance Radio Frequency Coil)
본 발명은 상기와 같은 문제점을 감안하여 안출된 것으로, 길이를 임의로 조절 가능한 라디오 주파수 코일을 제공하는 것을 일 목적으로 한다.The present invention has been made in view of the above problems, and an object thereof is to provide a radio frequency coil whose length can be arbitrarily adjusted.
또한, 본 발명은 단일 코일을 이용하여 다수 핵종의 신호를 획득할 수 있어, 단일 코일을 통하여 다수개의 공진 주파수를 가질 수 있는 라디오 주파수 코일 제공을 또 다른 목적으로 한다.In addition, another object of the present invention is to provide a radio frequency coil that can obtain a plurality of nuclide signals using a single coil, which can have a plurality of resonant frequencies through a single coil.
본 발명의 일 측면에 따른 자기공명영상용 라디오 주파수 코일은 자기공명영상용 라디오 주파수 코일에 있어서, 길이에 따라 특정한 공진 주파수를 갖는 다이폴 안테나와, 상기 다이폴 안테나 양 측면에 각각 위치하는 전기적 스위치를 포함하는 것을 일 특징으로 한다.According to an aspect of the present invention, a radio frequency coil for magnetic resonance imaging includes a radio frequency coil for magnetic resonance imaging, the dipole antenna having a specific resonance frequency according to a length, and an electrical switch located at both sides of the dipole antenna. It is characterized by doing.
바람직하게는 상기 전기적 스위치에 전압을 공급하여 상기 전기적 스위치의 on-off를 조절하는 전원부;를 더 포함하고, 상기 양 측면에 각각 위치하는 전기적 스위치는 상기 다이폴 안테나 중심으로부터 특정 간격만큼 떨어져 있을 수 있다.Preferably, the apparatus further includes a power supply unit for supplying a voltage to the electrical switch to control on-off of the electrical switch, wherein the electrical switches respectively positioned at both sides of the electrical switch may be separated from the center of the dipole antenna by a specific distance. .
바람직하게는 상기 양 측면에 각각 위치하는 전기적 스위치는, 상기 다이폴 안테나 좌측에 위치하는 복수개의 전기적 스위치 및 상기 좌측에 위치하는 복수개의 전기적 스위치와 대칭되는 배열로 구성된 상기 다이폴 안테나 우측에 위치하는 복수개의 전기적 스위치일 수 있다.Preferably, each of the electrical switches located on both sides of the plurality of electrical switches located on the left side of the dipole antenna and the plurality of electrical switches located on the left side of the plurality of electrical switches located on the left side of the dipole antenna It may be an electrical switch.
바람직하게는 상기 다이폴 안테나는 민더라인 또는 스파이럴 중 어느 하나의 형태로 이루어진 다이폴 안테나일 수 있다.Preferably, the dipole antenna may be a dipole antenna formed of any one of a meander line or a spiral.
바람직하게는 상기 다이폴 안테나 및 상기 다이폴 안테나 양 측면에 각각 위치하는 전기적 스위치를 일 구성으로 하여 상기 일 구성을 복수개 배열한 것을 특징으로 하는 평면다채널 형태의 자기공명영상용 라디오 주파수 코일일 수 있다.Preferably, the radio frequency coil may be a planar multi-channel magnetic resonance image coil having a plurality of one configurations, wherein the plurality of configurations are arranged by using the dipole antenna and the electrical switches positioned at both sides of the dipole antenna.
바람직하게는 상기 다이폴 안테나 및 상기 다이폴 안테나 양 측면에 각각 위치하는 전기적 스위치를 일 구성으로 하여 상기 일 구성을 복수개 배열한 것을 특징으로 하는 실린더다채널 형태의 자기공명영상용 라디오 주파수 코일일 수 있다.Preferably, the radio frequency coil for magnetic resonance imaging of a cylinder multi-channel type is characterized in that one configuration is arranged in a plurality of electrical switches located on both sides of the dipole antenna and the dipole antenna.
본 발명에 따르면, 단일의 라디오 주파수 코일을 초고자장에서 전기적 스위치와 직류 전류를 이용하여 길이를 임의로 조절 가능하고, 단일의 라디오 주파수 코일을 이용하여 단일 핵종이 아닌 다수 핵종의 신호를 획득할 수 있으며, 이를 통해 단일의 라디오 주파수 코일에서 다수개의 공진 주파수를 가질 수 있는 효과가 있다.According to the present invention, a single radio frequency coil can be arbitrarily adjusted in length by using an electrical switch and a direct current in an ultra-high magnetic field, and a signal of a plurality of radionuclides can be obtained using a single radio frequency coil. This has the effect of having multiple resonant frequencies in a single radio frequency coil.
도 1은 본 발명의 일 실시예에 따른 자기공명영상용 라디오 주파수 코일의 구성도이다.1 is a block diagram of a radio frequency coil for magnetic resonance imaging according to an embodiment of the present invention.
도 2는 본 발명의 일 실시예에 따른 전원부를 더 포함한 자기공명영상용 라디오 주파수 코일의 구성도이다.2 is a block diagram of a radio frequency coil for a magnetic resonance image further including a power supply according to an embodiment of the present invention.
도 3은 본 발명의 일 실시예에 따른 다이폴 안테나 양 측면에 복수개의 전기적 스위치를 갖는 자기공명영상용 라디오 주파수 코일의 구성도이다.3 is a block diagram of a magnetic resonance imaging radio frequency coil having a plurality of electrical switches on both sides of the dipole antenna according to an embodiment of the present invention.
도 4는 본 발명의 일 실시예에 따른 민더라인 또는 스파이럴 형태의 자기공명영상용 라디오 주파수 코일의 예를 나타낸 도면이다.4 is a diagram illustrating an example of a radio frequency coil for magnetic resonance imaging in a meander line or spiral form according to an embodiment of the present invention.
도 5는 본 발명의 일 실시예에 따른 평면다채널 형태의 자기공명영상용 라디오 주파수 코일의 예를 나타낸 도면이다.5 is a diagram illustrating an example of a radio frequency coil for magnetic resonance imaging in a planar multichannel type according to an embodiment of the present invention.
도 6은 본 발명의 일 실시예에 따른 실린더다채널 형태의 자기공명영상용 라디오 주파수 코일의 예를 나타낸 도면이다.6 is a diagram illustrating an example of a radio frequency coil for magnetic resonance imaging of a cylinder multichannel type according to an embodiment of the present invention.
본 발명과 본 발명의 동작상의 이점 및 본 발명의 실시에 의하여 달성되는 목적을 충분히 이해하기 위해서는 본 발명의 바람직한 실시 예를 예시하는 첨부 도면 및 도면에 기재된 내용을 참조하여야 한다. 또한 본 발명의 실시예에서 제시되는 특정한 구조 내지 기능적 설명들은 단지 본 발명의 개념에 따른 실시예를 설명하기 위한 목적으로 예시된 것으로, 본 발명의 개념에 따른 실시예들은 다양한 형태로 실시될 수 있다. 마찬가지로 본 명세서에 설명된 실시예들에 한정되는 것으로 해석되어서는 아니 되며, 본 발명의 사상 및 기술 범위에 포함되는 모든 변경물, 균등물 내지 대체물을 포함하는 것으로 이해되어야 한다. DETAILED DESCRIPTION In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings that illustrate preferred embodiments of the present invention. In addition, specific structural or functional descriptions presented in the embodiments of the present invention are only illustrated for the purpose of describing the embodiments according to the inventive concept, and the embodiments according to the inventive concept may be implemented in various forms. . Likewise, it should not be construed as limited to the embodiments described herein, but should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.
이하, 첨부한 도면을 참조하여 본 발명의 바람직한 실시예를 상세히 설명한다. 각 도면에 제시된 동일한 참조 부호는 동일한 부재를 나타낸다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.
도 1은 본 발명의 일 실시예에 따른 자기공명영상용 라디오 주파수 코일(1)의 구성도이고, 도 2는 본 발명의 일 실시예에 따른 전원부를 더 포함한 자기공명영상용 라디오 주파수 코일의 구성도이다. 이를 참조하여 설명한다.1 is a configuration of a radio frequency coil (1) for a magnetic resonance image according to an embodiment of the present invention, Figure 2 is a configuration of a radio frequency coil for a magnetic resonance image further including a power supply according to an embodiment of the present invention It is also. This will be described with reference.
본 발명의 일 실시예에 따른 자기공명영상용 라디오 주파수 코일(1)은 다이폴 안테나(10)와 전기적 스위치(20)을 포함하며, 본 발명의 일 측면에 따른 자기공명영상용 라디오 주파수 코일(2)은 다이폴 안테나(10)와 전기적 스위치(20) 및 전원부(30)를 포함한다.Magnetic resonance imaging
다이폴 안테나(10)를 설명하기 전에 일반적인 다이폴 안테나의 경우 길이에 의하여 주파수의 튜닝이 결정되는 특성을 가지고 있다. 즉 다이폴 안테나의 길이를 조절을 할 수 있다면 특정 공진 주파수로 변경 할 수 있다. 따라서 다이폴 안테나(10)는 길이에 따라 특정한 공진 주파수를 가질 수 있으며 이를 통해 자기공명영상용 라디오 주파수 코일의 길이 조정이 가능하다.Before the
전기적 스위치(20)은 일반적인 전기적 스위치이며 다이폴 안테나(10)의 양 측면에 각각 배치될 수 있으며, 이 때 특정 간격 또는 특정 배열로 배치될 수 있으며 일 실시예로써 동일한 간격디자 동일한 배열, 대칭 또는 비대칭적으로 위치할 수 있다. 전기적 스위치(20)의 전원이 on되는 경우 작동되어 다이폴 안테나(10)의 길이를 연장시키는 효과를 가지며 전원이 off되는 경우 비작동되어 다이폴 안테나(10)의 길이를 줄이는 효과를 가진다.The
전기적 스위치(20)는 일 실시예로써 핀다이오드일 수 있다.The
전원부(30)는 전기적 스위치(20)에 전원을 공급하여 전기적 스위치(20)의 on-off를 조절하는 역할을 하며 전술하였듯이 전원부(30)의 전원 공급에 의하여 전기적 스위치(20)이 on-off가 조절되어 다이폴 안테나(10)의 총 길이가 연장 혹은 축소될 수 있다.The
도 2를 참조하여 설명하면, 전원부(30)의 전원 공급으로 인해 전기적 스위치(20)의 전원이 on되는 경우(DC on) 다이폴 안테나(10)를 포함한 자기공명영상용 라디오 주파수 코일(2)의 총 길이는 연장되어 201과 같으며, 전원부(30)의 전원 공금 중단으로 전기적 스위치(20)의 전원이 off되는 경우(DC off) 다이폴 안테나(10)를 포함한 자기공명영상용 라디오 주파수 코일(2)의 총 길이는 축소되어 202와 같을 수 있다. Referring to FIG. 2, when the power of the
도 3은 본 발명의 일 실시예에 따른 다이폴 안테나 양 측면에 복수개의 전기적 스위치를 갖는 자기공명영상용 라디오 주파수 코일(3)의 구성도이다. 이를 참조하여 설명하면 다이폴 안테나(10)는 전술한 바와 같고, 다이폴 안테나(10) 좌측에 배열된 복수개의 전기적 스위치 및 우측에 배열된 복수개의 전기적 스위치를 통틀어 전기적 스위치(21)라 할 수 있으며 역할은 전술한 전기적 스위치(20)과 같다. 전기적 스위치(21) 역시 일 실시예로써 핀다이오드일 수 있다. 전원부(31) 역시 복수개의 그라운드(GND1, GND2) 및 직류전원(Vcc1, Vcc2)을 가질 수 있으며 전술한 전원부(30)와 동일한 기능을 수행한다. 전기적 스위치(21)는 다이폴 안테나(10) 양 측면으로 복수개씩 배치되어 자기공명영상용 라디오 주파수 코일(2)은 전술한 자기공명영상용 라디오 주파수 코일(1)보다 길이 조종이 더욱 용이하며 다수개의 공진 주파수를 가질 수 있게 튜닝될 수 있다. 3 is a block diagram of a magnetic resonance imaging
도 4는 본 발명의 일 실시예에 따른 민더라인 또는 스파이럴 형태의 자기공명영상용 라디오 주파수 코일의 예를 나타낸 도면으로 이를 참조하여 설명한다. 기존의 민더라인 형태의 다이폴 안테나(a-1)과 기존의 스파이럴 형태의 다이폴 안테나(b-1)에 전술한 방법을 적용하여 전기적 스위치를 적용하여, 본 발명의 일 실시예로서 제안하는 민더라인 형태의 자기공명영상용 라디오 주파수FIG. 4 is a view showing an example of a radio frequency coil for magnetic resonance imaging in a meander line or spiral form according to an embodiment of the present invention. The proposed method is applied as an embodiment of the present invention by applying the above-described method to the existing dipole antenna (a-1) and the existing spiral-type dipole antenna (b-1). Radio frequency for magnetic resonance imaging in the line
코일(a-2) 및 스파이럴 형태의 자기공명영상용 라디오 주파수 코일(b-2)을 구현할 수 있다(좌측에
도 5는 본 발명의 일 실시예에 따른 평면다채널 형태의 자기공명영상용 라디오 주파수 코일의 예를 나타낸 도면이고, 도 6은 본 발명의 일 실시예에 따른 실린더다채널 형태의 자기공명영상용 라디오 주파수 코일의 예를 나타낸 도면으로서 전술한 다이폴 안테나(10), 전기적 스위치(20, 21), 전원부(30, 31)를 각각 복수개 활용하여 평면다채널 형태의 자기공명영상용 라디오 주파수 코일 및 실린더다채널 형태의 자기공명영상용 라디오 주파수 코일 역시 구현 가능하다.5 is a view showing an example of a radio frequency coil for a planar multi-channel magnetic resonance image according to an embodiment of the present invention, Figure 6 is a magnetic resonance image for a cylinder multi-channel type according to an embodiment of the present invention As an example of a radio frequency coil, a plurality of radio frequency coils and cylinders for magnetic resonance imaging in a planar multichannel type are utilized by utilizing a plurality of the above-described
지금까지 본 발명을 바람직한 실시예를 참조하여 상세히 설명하였다. 그러나 본 발명이 상기한 실시예에 한정되는 것은 아니며, 이하의 특허청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형 또는 수정이 가능한 범위까지 본 발명의 기술적 사상이 미친다 할 것이다.The present invention has been described in detail with reference to preferred embodiments. However, the present invention is not limited to the above-described embodiments, and any person having ordinary skill in the art to which the present invention belongs without departing from the gist of the present invention as claimed in the following claims may make various changes or modifications. The technical spirit of the present invention will be extended to this possible range.
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| KR102276107B1 (en) | 2019-11-14 | 2021-07-13 | 가천대학교 산학협력단 | RF coil based on birdcage coil and dipole antenna for MRI |
| DE102024112391A1 (en) * | 2024-05-02 | 2025-11-06 | Forschungszentrum Jülich GmbH | Antenna, system and antenna arrangement as well as associated procedure |
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| US20100328171A1 (en) * | 2009-06-25 | 2010-12-30 | Hong Kong Applied Science And Technology Research Institute Co., Ltd. | Rollable and/or Foldable Antenna Systems and Methods for Use Thereof |
| US20120062230A1 (en) * | 2010-09-09 | 2012-03-15 | Vaughan Jr John Thomas | Active transmit elements for mri coils and other antenna devices |
| US20120306494A1 (en) * | 2011-05-31 | 2012-12-06 | General Electric Company | Magnetic resonance system and method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325522A (en) * | 2021-12-30 | 2022-04-12 | 武汉联影生命科学仪器有限公司 | Magnetic resonance circuit and magnetic resonance system |
| WO2023124446A1 (en) * | 2021-12-30 | 2023-07-06 | 武汉联影生命科学仪器有限公司 | Magnetic resonance system and circuit |
| CN114325522B (en) * | 2021-12-30 | 2023-09-05 | 武汉联影生命科学仪器有限公司 | Magnetic resonance circuit and magnetic resonance system |
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