JPH02182236A - Examination apparatus using nuclear magnetic resonance - Google Patents

Examination apparatus using nuclear magnetic resonance

Info

Publication number
JPH02182236A
JPH02182236A JP64000355A JP35589A JPH02182236A JP H02182236 A JPH02182236 A JP H02182236A JP 64000355 A JP64000355 A JP 64000355A JP 35589 A JP35589 A JP 35589A JP H02182236 A JPH02182236 A JP H02182236A
Authority
JP
Japan
Prior art keywords
coil
phase
magnetic resonance
nuclear magnetic
phase synthesizer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP64000355A
Other languages
Japanese (ja)
Inventor
Toshihiro Ishizuka
利博 石塚
Munetaka Tsuda
宗孝 津田
Masayuki Otsuka
雅之 大塚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP64000355A priority Critical patent/JPH02182236A/en
Publication of JPH02182236A publication Critical patent/JPH02182236A/en
Pending legal-status Critical Current

Links

Landscapes

  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

PURPOSE:To enhance the setting of a patient by unifying a phase device branching transmission power to coils while shifting the phase thereof by 90 deg. and synthesizing the receiving signals from the coils while shifting the same by 90 deg. in a phase with a QD coil main body. CONSTITUTION:A phase synthesizer 2 shifts the phase of transmission power by 90 deg. to respectively distribute the same to X- and Y-coils at the time of transmission and respectively shifts the phases of the receiving signals from the X- and Y-coils by 90 deg. at the time of reception to set said phases to the same phase and synthesizes a receiving signal. At the time of transmission, when the phase of transmission power is 0 deg. at T, the receiving signal of the X-coil advances by 90 deg. in a phase as compared with that of the Y-coil to be distributed and supplied to a QD coil 1. Contrarily, at the time of reception, the receiving signal of the X-coil delays by 90 deg. in a phase as compared with that of the Y-coil to reach R and, therefore, the receiving signals of the X and Y-coils become same in a phase and synthesized.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、核磁気共鳴現象に係り、被検体より医学的に
有効な診断情報すなわち被検体の特定部位の断層像やス
ペクトルを得るのに好適な核磁気共鳴装置の検出器に関
する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to nuclear magnetic resonance phenomena, and is useful for obtaining medically effective diagnostic information from a subject, that is, a tomographic image or spectrum of a specific part of the subject. The present invention relates to a suitable nuclear magnetic resonance apparatus detector.

〔従来の技術〕[Conventional technology]

従来、QDコイル及びラン1〜レース回路については、
ジャーナル・オブ・マグネティック・レゾナンス、69
 (1986年)第236頁から第242頁(JOIJ
NAL OF MAGNETICRESONANC[E
 69゜(1986) P P 236−242 )に
おいて論じられている。
Conventionally, for QD coils and run 1 to race circuits,
Journal of Magnetic Resonance, 69
(1986) pp. 236-242 (JOIJ
NAL OF MAGNETICRESONANC[E
69° (1986) P P 236-242).

ここで、Ql)コイル及びラットレース回路についての
原理及び方式については、言及されている。
Here, the principles and schemes for Ql) coils and rat race circuits are mentioned.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上記従来技術は、QDコイルと位相合成器との実用的な
操作性を考慮した構造及び機構について配慮がされてお
らず、QDコイルと位相合成器との接続方式等の実用性
の問題があった。
The above conventional technology does not consider the structure and mechanism of the QD coil and phase synthesizer in consideration of practical operability, and there are problems with practicality such as the connection method between the QD coil and the phase synthesizer. Ta.

本発明の目的は、QDコイルと、波長整合を取った同軸
線を利用し送信電力は、位相を90°ずらしてコイルに
分岐し、コイルからの受信信号は、位相を90°ずらし
て合成する位相合成器、例えばラットレース回路との、
接続方式等を操作可能な構造及び、機構とすることにあ
る。
The purpose of the present invention is to utilize a QD coil and a wavelength-matched coaxial line, and transmit power is branched to the coil with a phase shift of 90 degrees, and receive signals from the coils are synthesized with a phase shift of 90 degrees. With a phase synthesizer, e.g. a rat race circuit,
The purpose is to provide a structure and mechanism that allows the connection method to be operated.

〔課題を解決するための手段〕 上記目的は、位相合成器、例えばラットレース回路をケ
ース等に収納し、QDコイルと一体型の構造とすること
により、達成される。
[Means for Solving the Problems] The above object is achieved by housing a phase synthesizer, for example a rat race circuit, in a case or the like, and forming an integrated structure with a QD coil.

もしくは、位相合成器、例えばラットレース回路をケー
スに収納し、QDコイルとの接続部の同軸線を引き出し
た構造とし、耐記位相合成器を患者テーブル天板上のマ
ツl−1もしくは、患者テーブル天板に埋め込む構造、
もしくは、磁石の正面側に組み込む構造とすることによ
り達成される。
Alternatively, the phase synthesizer, such as a rat race circuit, may be housed in a case, and the coaxial line connected to the QD coil may be drawn out, and the phase synthesizer may be placed on the pine l-1 on the patient table top or on the patient table. Structure embedded in the table top,
Alternatively, this can be achieved by incorporating a structure into the front side of the magnet.

〔作用〕[Effect]

位相合成器、例えばラットレース回路は、2対の直交し
たコイルを有するQDコイルに対して、波長整合を取っ
た同軸線を利用して、送信電力は、位相を90°ずらし
て、それぞれのコイルに給電し、それぞれのコイルから
得られる受信信号は、位相を90’ずらして、合成する
様に動作する。
A phase synthesizer, for example, a rat race circuit, uses a wavelength-matched coaxial line for a QD coil that has two orthogonal pairs of coils, and transmits power to each coil with a phase shift of 90 degrees. The received signals obtained from the respective coils are shifted in phase by 90' and operated to be combined.

この位相器が、ケース内に収納され、QDコイルと一体
化した構造とすることで、オペレータは、位相合成器の
存在を意識せずに容易に患者セツティングの操作ができ
、性能の再現性が得られる。
By having this phaser housed in a case and integrated with the QD coil, the operator can easily operate the patient setting without being aware of the presence of the phase synthesizer, which improves reproducibility of performance. is obtained.

〔実施例〕〔Example〕

以下、本発明の1実施例を第1図を用いて説明する。2
対の直交したコイルを有するQDコイル1と、位相合成
器2が1体となった構造になっている。QDコイル1は
、コイル台6上に有り前後にスライドする。さらにQD
コイル1の内側にコイル台6に取付いている頭受け5が
スライドする。
Hereinafter, one embodiment of the present invention will be described using FIG. 1. 2
It has a structure in which a QD coil 1 having a pair of orthogonal coils and a phase synthesizer 2 are integrated into one unit. The QD coil 1 is placed on a coil stand 6 and slides back and forth. More QD
A head holder 5 attached to a coil stand 6 slides inside the coil 1.

よって、患者を頭受け5に寝かせた後QDコイル1を患
者の撮影部位にスライドさせて、合わせる。
Therefore, after the patient is placed on the head rest 5, the QD coil 1 is slid and aligned with the patient's imaging site.

この時、位相合成器2が患者の反対側にありコイルと1
体になっているため、簡便に患者セツティングが行なえ
、位相合成器2とQDコイル1を接続する必要はない。
At this time, the phase synthesizer 2 is on the opposite side of the patient and the coil and 1
Since the QD coil 1 is a body, patient setting can be performed easily, and there is no need to connect the phase synthesizer 2 and the QD coil 1.

その後、送信コネクタ3に送信ケーブルを接続し、受信
コネクタ4に受信ケーブルを接続する。
Thereafter, a transmission cable is connected to the transmission connector 3, and a reception cable is connected to the reception connector 4.

QDコイル1及び位相合成器2の原理については、“A
 Quadrature Co11 for the 
Adult )Iuman)lead” V、J、5A
NK、C−N、CI(EN、AND、I、HOULT、
J、M、R。
Regarding the principles of the QD coil 1 and phase synthesizer 2, see “A.
Quadrature Co11 for the
Adult) Iuman) lead” V, J, 5A
NK, C-N, CI (EN, AND, I, HOULT,
J.M.R.

69.236−242に詳細に論じられている。69.236-242.

第3図で示す様にQDコイル1は、直交した2対のコイ
ルが組込まれている。この場合ALDERMAN。
As shown in FIG. 3, the QD coil 1 incorporates two pairs of orthogonal coils. In this case ALDERMAN.

GRANT型のQDコイル1で、不平衡に給電する方式
としている。コイルの構成は、コイルの一方、例えばX
側のコイルが作用している時には、もう片方Y側のコイ
ルは、事実上存在しないのと等価となり、逆にY側が作
用している時も同様である。
The GRANT type QD coil 1 is used to supply power in an unbalanced manner. The configuration of the coil is such that one side of the coil, for example
When the coil on the Y side is acting, the other coil on the Y side is virtually equivalent to not existing, and the same is true when the coil on the Y side is acting.

位相合成器の例を第2図に示す。位相合成器のX、Yが
それぞれ第3図のQDコイル1のX、Yに接続される。
An example of a phase synthesizer is shown in FIG. The X and Y of the phase synthesizer are respectively connected to the X and Y of the QD coil 1 in FIG.

位相合成器は、送信時には、送信電力の位相を90°ず
らして、それぞれX、Yのコイルに分配し、受信時には
、それぞれX、Yのコイルからの受信信号の位相を90
°ずらして、同一位相にして、受信信号を合成するもの
である。
When transmitting, the phase synthesizer shifts the phase of the transmitted power by 90 degrees and distributes it to the X and Y coils, and when receiving, it shifts the phase of the received signal from the X and Y coils by 90 degrees.
The received signals are synthesized with the same phase by shifting the received signals.

第2図の位相合成器では、波長整合を取った同軸線、3
/4λケーブル、1/4λケーブルを円環状に結線して
いる。送信時には、送信電力が、Tで位相がOoの時、
XではYに比べ位相が90″′進んでQDコイル1に分
配給電される。逆に受信時には、Xの受信信号はYに比
べ位相が90’進んでQDコイル1に分配給電される。
In the phase synthesizer shown in Fig. 2, the wavelength-matched coaxial line, 3
/4λ cable and 1/4λ cable are connected in a ring. During transmission, when the transmission power is T and the phase is Oo,
In X, the phase is advanced by 90'' compared to Y, and the power is distributed to the QD coil 1. Conversely, at the time of reception, the received signal of X is advanced in phase by 90'' compared to Y, and the power is distributed to the QD coil 1.

逆に受信時には、Xの受信信号はYに比べ位相が90°
遅れてRに達するので、X、Yの受信信号は、同一位相
となり合成される。
Conversely, during reception, the received signal of X has a phase of 90° compared to Y.
Since it reaches R with a delay, the X and Y received signals have the same phase and are combined.

他の位相合成器2の例を第6図、第7図に示す。Examples of other phase synthesizers 2 are shown in FIGS. 6 and 7.

この例は、′トロイダル・コア活用百科 山村英穂著”
に詳細に論じられている。第6図の例は、quadra
fure hybridと呼ばれ、第7図の例は、br
anched hybridと呼ばれる。前述の第2図
の位相合成器と同様な機能を持っており、これをQDコ
イル1に接続してもよい。
An example of this is ``Toroidal Core Utilization Encyclopedia, written by Hideho Yamamura.''
is discussed in detail. The example in Figure 6 is quadra
It is called a fury hybrid, and the example in Fig. 7 is br
It is called an arched hybrid. It has the same function as the phase synthesizer shown in FIG. 2 described above, and may be connected to the QD coil 1.

他のQDコイル1と位相合成器2の構成の実施例髪第5
図に示す。位相合成器は、第4図に示す様にケース内に
収納し、位相合成器の同軸線のX。
Another example of the configuration of QD coil 1 and phase synthesizer 2 No. 5
As shown in the figure. The phase synthesizer is housed in a case as shown in Fig. 4, and the coaxial line of the phase synthesizer is

Yの1部を引出した構造となっている。それぞれX、Y
の位置にコネクタを取り付けて、QDコイル1のx、Y
に接続できるようになっている。位相合成器のケースは
、患者テーブル天板上に埋め込むか、マツ1−上に埋め
込む。
It has a structure in which a part of Y is pulled out. X, Y respectively
Attach the connector to the position of x, Y of QD coil 1.
It is now possible to connect to. The case of the phase synthesizer is embedded on the patient table top or on the pine 1-.

または、X、Yの同軸線の引出しを長くして、磁石正面
側に位相合成器を取りつける構造でも良い。
Alternatively, a structure may be adopted in which the X and Y coaxial lines are extended and the phase synthesizer is attached to the front side of the magnet.

また、頭部撮影用コイルを例に説明したが、他のコイル
、例えば全身撮影用コイル等でも以上の実施例は、実現
可能である。
Further, although the coil for head imaging has been described as an example, the above embodiments can be implemented using other coils, such as coils for whole body imaging.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、QDコイルと位相合成器を1体化した
構造とすることで、QDコイルと位相器との結線等の煩
雑さを省き、患者セツティングの向上の効果がある。
According to the present invention, the structure in which the QD coil and the phase synthesizer are integrated eliminates the complexity of wiring between the QD coil and the phase synthesizer, and has the effect of improving patient setting.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例の外観の立体図、第2図は位
相合成器2の回路図、第3図はQDコイル1のコイルの
立体図、第4図は位相合成器2の実施例の回路図、第5
図は一実施例の外観の立体図、第6図は位相合成器2の
一実施例の回路図、第7図は位相合成器2の一実施例の
概念図である。 1・・・QDコイル、2・・・位相合成器。
FIG. 1 is a three-dimensional diagram of the external appearance of an embodiment of the present invention, FIG. 2 is a circuit diagram of the phase synthesizer 2, FIG. 3 is a three-dimensional diagram of the coil of the QD coil 1, and FIG. Example circuit diagram, 5th
6 is a circuit diagram of an embodiment of the phase synthesizer 2, and FIG. 7 is a conceptual diagram of an embodiment of the phase synthesizer 2. 1...QD coil, 2...phase synthesizer.

Claims (1)

【特許請求の範囲】 1、被検体に均一な静磁界を印加する磁場手段と位置に
よつて強度の異なる傾斜磁界を発生する磁場手段とを組
合わせ、該被検体に核磁気共鳴現象を起こさせる高周波
磁界発生の手段と、核磁気共鳴信号を検出する検出器と
、信号を増幅する増幅器と、増幅された信号に演算処理
を行なう計算機と、演算処理された信号を表示する表示
手段とを有する核磁気共鳴に用いる前記検出器として、
2対の直交したコイルを有するQD(Quadratu
re)コイルにおいて、位相合成器を利用し、送信電力
は、位相を90゜ずらしてコイルに分岐しコイルからの
受信信号は、位相を90゜ずらして合成する位相器をQ
Dコイル本体と一体化した構造とする事に特徴を有する
核磁気共鳴を用いた検査装置。 2、位相合成器をケースに収納し、一部をケーブルで引
き出して、QDコイルと接続可能な構造とし位相合成器
を患者テーブル天板上、もしくは、天板上のマット、も
しくは、磁石正面側に埋め込んだ構造を特徴とする核磁
気共鳴を用いた検査装置。 3、前記位相合成器にラットレース回路もしくは、クワ
ドルチヤ・ハイブリッド、もしくは、ブランチド・ハイ
ブリッドを用いたことを特徴とする核磁気共鳴を用いた
検査装置。
[Scope of Claims] 1. A method for causing a nuclear magnetic resonance phenomenon in a subject by combining a magnetic field means that applies a uniform static magnetic field to the subject and a magnetic field means that generates a gradient magnetic field whose strength differs depending on the position. means for generating a high frequency magnetic field, a detector for detecting a nuclear magnetic resonance signal, an amplifier for amplifying the signal, a computer for performing arithmetic processing on the amplified signal, and a display means for displaying the arithmetic processed signal. As the detector used for nuclear magnetic resonance,
QD (Quadratu) has two pairs of orthogonal coils.
re) In the coil, a phase synthesizer is used, the transmitted power is branched to the coil with a phase shift of 90 degrees, and the received signal from the coil is synthesized with a phase shift of 90 degrees.
An inspection device using nuclear magnetic resonance that is characterized by a structure that is integrated with the D coil body. 2. Store the phase synthesizer in a case, pull out part of it with a cable, and connect it to the QD coil. Place the phase synthesizer on the top of the patient table, on the mat on the top, or on the front side of the magnet. An inspection device that uses nuclear magnetic resonance and features a structure embedded in. 3. An inspection device using nuclear magnetic resonance, characterized in that the phase synthesizer uses a rat race circuit, a quadrature hybrid, or a branched hybrid.
JP64000355A 1989-01-06 1989-01-06 Examination apparatus using nuclear magnetic resonance Pending JPH02182236A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP64000355A JPH02182236A (en) 1989-01-06 1989-01-06 Examination apparatus using nuclear magnetic resonance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP64000355A JPH02182236A (en) 1989-01-06 1989-01-06 Examination apparatus using nuclear magnetic resonance

Publications (1)

Publication Number Publication Date
JPH02182236A true JPH02182236A (en) 1990-07-16

Family

ID=11471517

Family Applications (1)

Application Number Title Priority Date Filing Date
JP64000355A Pending JPH02182236A (en) 1989-01-06 1989-01-06 Examination apparatus using nuclear magnetic resonance

Country Status (1)

Country Link
JP (1) JPH02182236A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62252915A (en) * 1986-02-10 1987-11-04 ザ・リージエンツ・オブ・ザ・ユニバーシテイー・オブ・カリフオルニア Right angle phase radio frequency coil and magnetic resonance imaging apparatus
JPS63118647A (en) * 1986-11-07 1988-05-23 Mitsubishi Electric Corp High frequency probe for nmr
JPS63222755A (en) * 1987-03-13 1988-09-16 株式会社日立製作所 Mri signal detector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62252915A (en) * 1986-02-10 1987-11-04 ザ・リージエンツ・オブ・ザ・ユニバーシテイー・オブ・カリフオルニア Right angle phase radio frequency coil and magnetic resonance imaging apparatus
JPS63118647A (en) * 1986-11-07 1988-05-23 Mitsubishi Electric Corp High frequency probe for nmr
JPS63222755A (en) * 1987-03-13 1988-09-16 株式会社日立製作所 Mri signal detector

Similar Documents

Publication Publication Date Title
JP2799894B2 (en) Magnetic resonance imaging device
US7012430B2 (en) Transmit/receive phased array coil system
US5374890A (en) Simultaneous magnetic resonance imaging of multiple human organs
JP2003180659A (en) Rf coil system for magnetic resonance imaging device
EP0580327B1 (en) Magnetic resonance apparatus
JP3983170B2 (en) Method for acquiring MRI image using subsampling in vertical magnetic field MRI apparatus
JP2002533137A (en) MRI using a catheter antenna in cylindrical coordinates
JP2008079906A (en) Mri apparatus, and rf coil unit for the same
JP2834556B2 (en) Nuclear magnetic resonance tomography system
US20090082662A1 (en) Mri breast image magnet structure
JPH05269111A (en) Magnetic resonance device and signal connecting device
JPH0243493B2 (en)
JP2001198100A (en) Mr data gathering method, mr image display method and mri device
JPH0647020A (en) Probe for nuclear magnetic resonance system
US5442292A (en) Nuclear magnetic resonance apparatus having at least two transmission frequencies
JP2007050235A (en) Magnetic resonance imaging apparatus and high frequency coil unit
JPH02182236A (en) Examination apparatus using nuclear magnetic resonance
EP0797102B1 (en) A device for excitation and detection of magnetic resonance
JP7199836B2 (en) Magnetic resonance imaging device
JP2019000525A (en) Magnetic resonance imaging apparatus
JP3469651B2 (en) Intracoil for MRI and MRI apparatus
JP2677104B2 (en) Signal detection device for MRI device
JP2005152534A (en) Magnetic resonance imaging apparatus and rf wave generation method
JP4817966B2 (en) MRI apparatus and high frequency coil for MRI apparatus
US10816619B2 (en) Couchtop attachment-detachment type RF coil and magnetic resonance imaging apparatus