JPH0570457B2 - - Google Patents
Info
- Publication number
- JPH0570457B2 JPH0570457B2 JP1091937A JP9193789A JPH0570457B2 JP H0570457 B2 JPH0570457 B2 JP H0570457B2 JP 1091937 A JP1091937 A JP 1091937A JP 9193789 A JP9193789 A JP 9193789A JP H0570457 B2 JPH0570457 B2 JP H0570457B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- annular
- magnetic resonance
- annular members
- attached
- 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.)
- Expired - Lifetime
Links
- 238000003384 imaging method Methods 0.000 claims description 20
- 210000003128 head Anatomy 0.000 description 12
- 238000002595 magnetic resonance imaging Methods 0.000 description 9
- 230000003068 static effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 210000001061 forehead Anatomy 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 210000002414 leg Anatomy 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Magnetic Resonance Imaging Apparatus (AREA)
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は、被検体の様々な部位から磁気共鳴信
号（以下、MR信号という）を収集し診断に利用
する磁気共鳴診断装置に関し、特に、前記MR信
号を送信ないし受信するための高周波コイル（以
下、RFコイルという）の改良に関する。[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to magnetic resonance diagnosis in which magnetic resonance signals (hereinafter referred to as MR signals) are collected from various parts of a subject and used for diagnosis. The present invention relates to a device, and particularly relates to an improvement in a high frequency coil (hereinafter referred to as an RF coil) for transmitting or receiving the MR signal.
（従来の技術）
この種の磁気共鳴診断装置の代表的なものとし
て、磁気共鳴イメージ装置（以下、MRI装置と
いう）がある。このMRI装置においては、患者
等の被検体の任意の部位を撮影部位に設定し、こ
の撮影部位からMR信号を収集し、この収集した
信号に画像再構成処理等の信号処理を施すことに
より、前記撮影部位の断面像等を得ることが可能
となされている。(Prior Art) A typical example of this type of magnetic resonance diagnostic apparatus is a magnetic resonance imaging apparatus (hereinafter referred to as an MRI apparatus). In this MRI apparatus, an arbitrary part of a subject such as a patient is set as the imaging part, MR signals are collected from this imaging part, and the collected signals are subjected to signal processing such as image reconstruction processing. It is possible to obtain a cross-sectional image of the photographed region.
この種のMRI装置においては、前記撮影部位
の鮮明な画像情報が得られるように、できるだけ
高いＳ／Ｎ比のMR信号収集が要求される。すな
わち、撮影部位のスピンをRFパルスで予定通り
励起し、そこから微量なMR信号を無駄なく検出
することが要求されている。そこで、原理的に
は、前記MR信号の収集を行うRFコイルを被検
体の撮影部位のできるだけ近傍に巻回すること、
現実的には、RFコイルを撮影部位のできるだけ
表面に近接させて巻回すること、が必要とされて
いる。 This type of MRI apparatus is required to collect MR signals with as high an S/N ratio as possible so that clear image information of the imaging region can be obtained. In other words, it is required to excite the spins of the imaged region with RF pulses as planned and to detect minute MR signals from them without wasting any waste. Therefore, in principle, the RF coil that collects the MR signals should be wound as close as possible to the imaging area of the subject;
In reality, it is necessary to wind the RF coil as close to the surface of the imaging site as possible.
この必要性から、例えば、上下２本に分割自在
なボビンであつて合体した際にRFコイルを形成
する構成のものが実用に供されている。この構成
であれば、前記２体を分離した状態から頭部等の
撮影部位に装着できるため、始めから余裕をもつ
て頭部を挿入自在とする大きさを有する筒状のボ
ビンと比較し、撮影部位表面により近接した状態
で使用できる。 In response to this need, for example, a bobbin that can be divided into two parts (upper and lower), which when combined form an RF coil, has been put into practical use. With this configuration, since the two bodies can be attached to the imaging site such as the head from a separated state, compared to a cylindrical bobbin whose size allows the head to be inserted freely from the beginning, It can be used closer to the surface of the area to be imaged.
（発明が解決しようとする課題）
しかしながら、前記頭部以外にも胴体部、脚
部、腕部等様々な被検体各部位に対応して多種類
のRFコイルを用意することは付属部品を増大さ
せ、さらに、ある程度大きさに余裕のあるRFコ
イルを用意して高Ｓ／Ｎ比が得られなくなること
を避け、同じ撮影部位に対しても様々なサイズに
対応させてサイズを多段階に揃えようとすると、
用意するRFコイル数は一層多くならざるを得な
い。(Problem to be solved by the invention) However, preparing multiple types of RF coils corresponding to various parts of the subject, such as the torso, legs, arms, etc. in addition to the head, increases the number of attached parts. In addition, by preparing an RF coil with a certain amount of leeway in size, it is possible to avoid not being able to obtain a high S/N ratio, and to accommodate various sizes even for the same imaging site, making the size available in multiple stages. If you try,
The number of RF coils to be prepared will inevitably increase.
本発明はこのような従来技術の課題に鑑みてな
されたものであり、用意する部品が少なくとも、
撮影部位の磁気共鳴信号を極力高Ｓ／Ｎ比で収集
できる磁気共鳴診断装置を提供することを目的と
する。 The present invention has been made in view of the problems of the prior art, and the parts to be prepared are at least
It is an object of the present invention to provide a magnetic resonance diagnostic apparatus that can collect magnetic resonance signals of an imaged region with as high an S/N ratio as possible.
（課題を解決するための手段）
上記課題を解決しかつ目的を達成するために本
発明においては、被検体の撮影部位から磁気共鳴
信号を取り出すため、前記撮影部位近傍に高周波
コイルが配設される磁気共鳴診断装置において、
前記高周波コイルは、この高周波コイルの一部を
形成する環状部材と、この環状部材を着脱自在
に、かつ、任意の角度の傾斜を持つて支持する支
持部材と、この支持部材に装着される複数個の環
状部材同士を１個のコイルとして電気的に接続し
得る接続部材と、を具備したことを要旨としてい
る。
(Means for Solving the Problems) In order to solve the above problems and achieve the objects, in the present invention, a high frequency coil is disposed near the imaging site in order to extract magnetic resonance signals from the imaging site of the subject. In magnetic resonance diagnostic equipment,
The high-frequency coil includes an annular member that forms a part of the high-frequency coil, a support member that supports the annular member detachably and with an inclination of an arbitrary angle, and a plurality of members that are attached to the support member. The gist of the present invention is to include a connecting member that can electrically connect two annular members to each other as one coil.
（作用）
このような手段を講じた構成によれば、次のよ
うな作用を奏する。すなわち、様々な径の環状部
材を複数個用意し、予定の撮影部位のサイズ等に
応じて適切な径の環状部材を選択してこれら環状
部材を支持部材に装着すれば、前記接続部材によ
り前記装着された各環状部材同士が１個の高周波
コイルとして接続され、撮影部位のサイズ等に適
合するすなわち撮影部位のできるだけ表面に近接
する高周波コイルを形成できるため、被検体の
様々な部位に対応して多くの高周波コイルを用意
しなくとも、撮影部位の磁気共鳴信号を極力高
Ｓ／Ｎ比で収集できる。(Function) According to the configuration that takes such measures, the following effects are achieved. That is, by preparing a plurality of annular members with various diameters, selecting an annular member with an appropriate diameter depending on the size of the scheduled imaging site, etc., and attaching these annular members to the support member, the connecting member The attached annular members are connected to each other as one high-frequency coil, and the high-frequency coil can be formed to fit the size of the area to be imaged, that is, to be as close to the surface of the area to be imaged as possible, so it can be used for various areas of the subject. The magnetic resonance signals of the imaged region can be collected at the highest possible S/N ratio without having to prepare many high-frequency coils.
（実施例）
以下、本発明にかかる磁気共鳴診断装置を
MRI装置に適用した一実施例について、第１図
ないし第５図を参照にしながら説明する。(Example) Hereinafter, a magnetic resonance diagnostic apparatus according to the present invention will be described.
An embodiment applied to an MRI apparatus will be described with reference to FIGS. 1 to 5.
第１図はMRI装置の概略構成を示している。
このMRI装置は、被検体Ｐを内部に収容できる
構成がとられるマグネツトアツセンブリとして、
常電導または超電導方式により静磁場コイル（静
磁場補正用シムコイルが付加されていることもあ
る。）１と、MR信号の誘起部位の位置情報付与
のための傾斜磁場を発生する傾斜磁場コイル２
と、励起用の回転高周波磁場を送信する図示しな
い送信コイルと、励起されたMR信号を検出する
後述の受信コイル部（高周波コイル）３とを具備
している。 FIG. 1 shows the schematic configuration of the MRI apparatus.
This MRI device is a magnetic assembly configured to accommodate the subject P inside.
A static magnetic field coil (sometimes a shim coil for static magnetic field correction is added) 1 using a normal conduction or superconducting method, and a gradient magnetic field coil 2 that generates a gradient magnetic field for providing positional information of the MR signal induction site.
, a transmitting coil (not shown) that transmits a rotating high-frequency magnetic field for excitation, and a receiving coil section (high-frequency coil) 3 (described later) that detects the excited MR signal.
また、電気系としては、以下のような構成にな
つている。すなわち、静磁場コイル１が超電導方
式であれば冷媒の供給制御系を含むものであつ
て、主として静磁場電源の通電制御を行う静磁場
制御系４、Ｘ軸，Ｙ軸，Ｚ軸傾斜磁場電源５，
６，７、送信器８、受信器９、所定のパルスシー
ケンスを実施するシーケンサ１０、これらを制御
することともに検出信号の信号処理およびその表
示を行うコンピユータシステム１１およびデイス
プレイ１２を具備している。 The electrical system has the following configuration. That is, if the static magnetic field coil 1 is a superconducting type, it includes a refrigerant supply control system, a static magnetic field control system 4 that mainly controls the energization of the static magnetic field power supply, and an X-axis, Y-axis, and Z-axis gradient magnetic field power supply. 5,
6, 7, a transmitter 8, a receiver 9, a sequencer 10 for implementing a predetermined pulse sequence, a computer system 11 and a display 12 for controlling these, as well as processing and displaying a detection signal.
前記受信コイル部３は、第２図ａ，ｂに示すよ
うに、大まかには、上部を形成する環状部材２１
と、下部を形成する支持部２７とからなる。 As shown in FIGS. 2a and 2b, the receiving coil section 3 roughly includes an annular member 21 forming an upper part.
and a support part 27 forming a lower part.
前記環状部材２１は、銅等の導電性体からなり
内径ｔのパイプで作成されており、一部が欠如さ
れた環状の環状部２１ｃと、前記欠如された部分
の端部から外周の一方向に向けて間隔ｄで屈曲さ
れた端部２１ａ，２１ｂとからなる。そして、前
記環状部２１ｃの直径Ｄが違う以外は同じサイ
ズ、形状の環状部材２１が複数個用意されるもの
である。 The annular member 21 is made of a pipe made of a conductive material such as copper and has an inner diameter of t, and includes an annular annular portion 21c with a portion cut out, and a direction extending from the end of the cut portion to the outer circumference in one direction. The end portions 21a and 21b are bent at a distance d toward the end portions 21a and 21b. A plurality of annular members 21 having the same size and shape are prepared except that the diameter D of the annular portion 21c is different.
また、前記支持部２７は、環状部材２１の両端
部２１ａ，２１ｂそれぞれを着脱自在とするアダ
プタ２３と、支持部２７の筐体３３の長手方向両
端近傍にその長手方向に沿つて一対に配設されて
前記アダプタ２３の第１図ｂ左右方向へのスライ
ドをガイドする不導体のガイド部材３５と、環状
部材２１が複数個装着された際にこれらの各環状
部材２１同士を１個のコイルとして電気的に接続
する接続部材２５と、チユーニング回路部３７な
どを具備している。 Further, the support section 27 includes an adapter 23 that can be attached to and detached from both ends 21a and 21b of the annular member 21, and a pair of adapters 23 disposed along the longitudinal direction near both longitudinal ends of the casing 33 of the support section 27. When a plurality of annular members 21 are attached, a non-conductor guide member 35 that guides the slide of the adapter 23 in the left-right direction in FIG. It includes a connecting member 25 for electrical connection, a tuning circuit section 37, and the like.
前記アダプタ２３は導電性であり、かつ前記ガ
イド部材３５に一対に複数組具備されている。ま
た、このアダプタ２３の上部には、環状部材２１
両端部２１ａ，２１ｂパイプ内に嵌入自在である
とともに撚銅線等からなり任意の方向に屈曲自在
な導電性の突起２９が配設されている。 The adapters 23 are electrically conductive, and a plurality of pairs of adapters 23 are provided on the guide member 35. Further, on the top of this adapter 23, an annular member 21 is provided.
Conductive protrusions 29 which can be fitted into the pipes at both ends 21a and 21b and are made of twisted copper wire or the like and can be bent in any direction are provided.
また、前記支持部２７の筐体３３の上面には、
前記ガイド部材３５の上方に当たる部分に２例の
開口３１が設けられている。なお、筐体３３は、
例えば被検体の頭部PHを撮影部位とする際に
は、図示しない寝台天板取付部材等に着脱自在な
構成とするとよい。 Further, on the upper surface of the casing 33 of the support section 27,
Two openings 31 are provided in the upper portion of the guide member 35. As shown in FIG. Note that the housing 33 is
For example, when the subject's head PH is to be imaged, it is preferable to have a structure that can be detachably attached to a bed top plate attachment member (not shown) or the like.
また、前記接続部材２５は導電性であり、例え
ば全てのアダプタ２３に環状部材２１が装着され
ることを前提とし、この状態で装着された環状部
材全てが電気的に１つのソレノイドコイルとなる
ように、違うガイド部材３５に配設されているア
ダプタ２３同士を電気的に接続している。なお、
このように、すべてのアダプタ２３に環状部材２
１が装着されることを前提とするのではなく、適
宜設定した個数の環状部材２１をアダプタ２３に
装着できる前提の構成であつてもよい。すなわ
ち、接続部材２５は、装着された環状部材２１全
てが電気的に１つのコイルとなるように、環状部
材２１が装着されたアダプタ２３に適宜着脱自在
な構成であつてもよく、この構成であれば、必要
なインイダクタンスに応じ、環状部材２１の使用
個数も任意に選択できる。 Further, the connecting member 25 is conductive, and assuming that the annular member 21 is attached to all the adapters 23, for example, all the annular members attached in this state electrically become one solenoid coil. In addition, the adapters 23 disposed on different guide members 35 are electrically connected to each other. In addition,
In this way, the annular member 2 is attached to all the adapters 23.
1 may be attached to the adapter 23, but the configuration may be such that an appropriately set number of annular members 21 can be attached to the adapter 23. That is, the connection member 25 may be configured to be detachable from the adapter 23 to which the annular member 21 is attached, as appropriate, so that all of the attached annular members 21 electrically form one coil. If so, the number of annular members 21 to be used can be arbitrarily selected depending on the required inductance.
また、前記チユーニング回路部３７は、第３図
に示すようなチユーニング回路の一部の構成要素
を含むもので、バリアブルコンデンサ４１等から
なる。そして、この図に示されるインダクタンス
Ｌは、支持部２７に装着された環状部材２１、突
起２９、アダプタ２３、接続部材２５等で形成さ
れるソレノイドコイルのインダクタンスを示して
いる。前記バリアブルコンデンサ４１において
は、前記インダクタンスＬが、環状部材２１それ
ぞれの間隔、直径Ｄ、傾斜角度等により変化する
ため、この変化に応じてチユーニングをとれる容
量範囲を有するものが用いられる。なお、このチ
ユーニング回路部３７近傍の筐体３３には、MR
信号を受け取る図示しないケーブル等との接続の
ためのコネクタ端子３８が配設されている。 Further, the tuning circuit section 37 includes some components of a tuning circuit as shown in FIG. 3, and is composed of a variable capacitor 41 and the like. The inductance L shown in this figure indicates the inductance of the solenoid coil formed by the annular member 21 mounted on the support portion 27, the protrusion 29, the adapter 23, the connecting member 25, and the like. In the variable capacitor 41, since the inductance L varies depending on the spacing, diameter D, inclination angle, etc. of each of the annular members 21, a capacitor having a capacitance range that can be tuned in accordance with these changes is used. Note that the housing 33 near the tuning circuit section 37 has an MR
A connector terminal 38 is provided for connection to a cable (not shown) for receiving signals.
なお、符号３９は、アダプタ２３のガイド部材
３５の適宜設定される箇所での固定、および環状
部材２１の適宜設定される傾斜角度の固定を図る
ためのストツパーを示している。 Note that reference numeral 39 indicates a stopper for fixing the guide member 35 of the adapter 23 at an appropriately set position and fixing the appropriately set inclination angle of the annular member 21.
以上の構成を有する受信コイル部３において、
予定の撮影部位である被検体Ｐ頭部PHのサイ
ズ、形状等に応じて、適切な径の環状部材２１を
選択し、これらの環状部材２１を適宜設定される
角度でアダプタ２３に装着すると、装着した各環
状部材２１同士が１個のコイルとして電気的に接
続され、頭部PH表面に近接したコイルを形成で
きるため、この頭部PHのMR信号を極力高Ｓ／
Ｎ比で収集できる。 In the receiving coil section 3 having the above configuration,
When annular members 21 with appropriate diameters are selected according to the size, shape, etc. of the subject P's head PH, which is the planned imaging site, and these annular members 21 are attached to the adapter 23 at an appropriately set angle, The attached annular members 21 are electrically connected to each other as one coil, and a coil close to the surface of the head PH can be formed, so the MR signal of the head PH can be kept at a high S/
Can be collected at N ratio.
また、例えば、第４図ａ，ｂ，ｃ，ｄに示すよ
うに、環状部材２１同士の間隔Ｐおよび成す角度
θを様々に変化させることにより、他より感度の
高いMR信号を得ようとする部位を自在に設定で
きる。 Furthermore, as shown in FIG. 4 a, b, c, and d, for example, by varying the distance P between the annular members 21 and the angle θ formed by the annular members 21, it is possible to obtain an MR signal with higher sensitivity than others. You can freely set the parts.
すなわち、頭部PH全体で均一な感度のMR信
号を収集したい際には、第４図ａに示すように、
前記角度θをなくし、前記間隔Ｐを大きく調節す
ればよく、耳および目等の特定部位について特に
感度の高いMR信号を収集したい際には、第４図
ｂに示すように、その特定部位に環状部材２１を
集中的に配設すればよい。 In other words, when you want to collect MR signals with uniform sensitivity over the entire head PH, as shown in Figure 4a,
It is sufficient to eliminate the angle θ and largely adjust the interval P. When it is desired to collect MR signals with particularly high sensitivity for specific parts such as ears and eyes, as shown in Fig. 4b, The annular members 21 may be centrally arranged.
また、第４図ｃに示すように、頭部PH上方ほ
ど環状部材２１同士が開くように調節することに
より、環状部材２１の間隔Ｐが狭い方、すなわち
後頭部ほど感度が高いMR信号が得られ、第４図
ｄに示すように、全ての環状部材２１を上側の特
定部位に向けて傾斜させれば、環状部材２１に、
間隔Ｐが狭い側すなわち前頭部側でサーフエイス
コイルと同様の働きをさせることもできる。 Furthermore, as shown in FIG. 4c, by adjusting the annular members 21 to be more open toward the upper part of the head PH, an MR signal with higher sensitivity can be obtained where the interval P between the annular members 21 is narrower, that is, at the back of the head. , as shown in FIG. 4d, if all the annular members 21 are tilted toward a specific upper part, the annular members 21 will have the following properties:
It is also possible to have the same function as the Surf Eighth coil on the side where the distance P is narrower, that is, on the forehead side.
また、上記実施例は頭部PH撮影用のコイルの
みに適用されるのでないことはいうまでもなく、
第４図ｃ，ｄに示すように上側と下側との間隔Ｐ
をそれぞれ違わせてMR信号の収集を行う方法
で、第５図ａ，ｂ，ｃ，ｄに示すように、膝４
３、肘４５、手４７等人体の関節部分あるいは集
合する部分等を撮影部位とすることもできる。こ
の際には、関節を少しずつ動かしながらのシネ撮
影も簡便に行え、有効性が高い。 In addition, it goes without saying that the above embodiments are not only applied to coils for head PH photography.
The distance P between the upper and lower sides as shown in Figure 4c and d
As shown in Figure 5 a, b, c, and d, this method collects MR signals by using different knee
3. Joints of the human body, such as the elbow 45 and hand 47, or joints, etc., can also be photographed. At this time, cine photography can be easily performed while moving the joint little by little, which is highly effective.
したがつて、このような受信コイル部３を
MRI装置に具備することにより、１つの支持部
２７で様々な部位を撮影でき、様々な部位それぞ
れに対応してコイルを多量に用意するのではない
ため、部品数を大幅に削減でき、低コスト化が図
れるとともに、コイルの管理が容易になる。ま
た、撮影部位および撮影条件を変える際の、全く
別なコイル体を用意する手間が省かれ、コイルの
被検体への装着時間の短縮も図れる。また、固定
サイズ、形状のボビンを使用しないため、被検体
の居住性が良好となる。 Therefore, such a receiving coil section 3 is
By equipping an MRI device, various parts can be imaged with one support part 27, and since a large number of coils are not prepared for each part, the number of parts can be significantly reduced, resulting in low cost. This makes it easier to manage the coils. Further, when changing the imaging site and imaging conditions, the effort of preparing a completely different coil body is saved, and the time required to attach the coil to the subject can be shortened. Furthermore, since a bobbin of a fixed size and shape is not used, the comfort of the subject is improved.
以上、詳細に説明したように、本発明において
は、被検体の撮影部位から磁気共鳴信号を取り出
すため、前記撮影部位近傍に高周波コイルが配設
される磁気共鳴診断装置において、前記高周波コ
イルは、この高周波コイルの一部を形成する環状
部材と、この環状部材を着脱自在にかつ、任意の
角度の傾斜を持つて支持する支持部材と、この支
持部材に装着される複数個の環状部材同士を１個
のコイルとして電気的に接続し得る接続部材と、
を具備した構成としている。
As described in detail above, in the present invention, in a magnetic resonance diagnostic apparatus in which a high-frequency coil is disposed near the imaging site in order to extract magnetic resonance signals from the imaging site of a subject, the high-frequency coil: An annular member that forms a part of this high-frequency coil, a support member that supports this annular member removably and with an arbitrary angle of inclination, and a plurality of annular members that are attached to this support member. A connecting member that can be electrically connected as one coil;
The structure is equipped with the following.
このため、様々な径の環状部材を複数個用意
し、予定の撮影部位のサイズ等に応じて適切な径
の環状部材を選択してこれらを支持部材に装着す
ることで、前記支持部材により前記装着された各
環状部材同士が１個のコイルとして接続され、撮
影部位のサイズ等に適合するすなわち撮影部位の
できるだけ表面に接近する高周波コイルを形成で
きるため、被検体の様々な部位に対応して多くの
高周波コイルを用意しなくとも、撮影部位の磁気
共鳴信号を極力高Ｓ／Ｎ比で収集できる。 Therefore, by preparing a plurality of annular members with various diameters, selecting an annular member with an appropriate diameter depending on the size of the scheduled imaging site, etc., and attaching these to the support member, the support member can Each attached annular member is connected as a single coil, and it is possible to form a high-frequency coil that fits the size of the area to be imaged, that is, to get as close to the surface of the area to be imaged as possible, so it can be used for various areas of the subject. Magnetic resonance signals of the imaging site can be collected with as high a S/N ratio as possible without having to prepare many high-frequency coils.
第１図は本発明が適用されるMRI装置の概略
構成説明図、第２図ａは本発明にかかる受信コイ
ル部の一実施例を示す略断面構成説明図、第２図
ｂは第２図ａのＡ−Ａ略断面構成説明図、第３図
はチユーニング回路の一実施例を示す回路図、第
４図ａ〜ｄは様々に調節されたコイルの配設例を
示す説明図、第５図は頭部以外の様々な撮影部位
に対するコイルの配設例を示す説明図、である。
１……静磁場コイル、２……傾斜磁場コイル、
３……受信コイル部、２１……環状部材、２３…
…アダプタ、２５……接続部材、２７……支持
部、３５……ガイド部材、３７……チユーニング
回路部。
FIG. 1 is an explanatory diagram of a schematic configuration of an MRI apparatus to which the present invention is applied, FIG. FIG. 3 is a circuit diagram showing an example of a tuning circuit; FIGS. 4 a to d are explanatory diagrams showing examples of arrangement of variously adjusted coils; FIG. 5 1 is an explanatory diagram showing an example of arrangement of coils for various imaging regions other than the head; FIG. 1... Static magnetic field coil, 2... Gradient magnetic field coil,
3... Receiving coil section, 21... Annular member, 23...
... adapter, 25 ... connection member, 27 ... support section, 35 ... guide member, 37 ... tuning circuit section.
Claims (1)
すため、前記撮影部位近傍に高周波コイルが配設
される磁気共鳴診断装置において、 前記高周波コイルは、この高周波コイルの一部
を形成する環状部材と、この環状部材を着脱自在
に、かつ、任意の角度の傾斜を持つて支持する支
持部材と、この支持部材に装着される複数個の環
状部材同士を１個のコイルとして電気的に接続し
得る接続部材と、を具備したことを特徴とする磁
気共鳴診断装置。[Scope of Claims] 1. A magnetic resonance diagnostic apparatus in which a high-frequency coil is disposed near the imaging site in order to extract magnetic resonance signals from the imaging site of the subject, wherein the high-frequency coil has a part of the high-frequency coil. An annular member to be formed, a support member that supports the annular member removably and with an arbitrary angle of inclination, and a plurality of annular members attached to this support member that are connected to each other as one coil and are electrically connected to each other as a single coil. 1. A magnetic resonance diagnostic apparatus comprising: a connecting member that can be connected to the magnetic resonance diagnostic apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1091937A JPH02271833A (en) | 1989-04-13 | 1989-04-13 | Magnetic resonance diagnostic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1091937A JPH02271833A (en) | 1989-04-13 | 1989-04-13 | Magnetic resonance diagnostic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02271833A JPH02271833A (en) | 1990-11-06 |
| JPH0570457B2 true JPH0570457B2 (en) | 1993-10-05 |
Family
ID=14040511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1091937A Granted JPH02271833A (en) | 1989-04-13 | 1989-04-13 | Magnetic resonance diagnostic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02271833A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3492040B2 (en) * | 1995-08-09 | 2004-02-03 | 株式会社日立メディコ | RF probe for magnetic resonance equipment |
| KR20040013704A (en) * | 2002-08-08 | 2004-02-14 | 주식회사 아이솔테크놀로지 | TEM Head-size Resonator Coil |
-
1989
- 1989-04-13 JP JP1091937A patent/JPH02271833A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02271833A (en) | 1990-11-06 |
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