JP4843469B2 - Magnetic resonance imaging system - Google Patents

Magnetic resonance imaging system Download PDF

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JP4843469B2
JP4843469B2 JP2006316574A JP2006316574A JP4843469B2 JP 4843469 B2 JP4843469 B2 JP 4843469B2 JP 2006316574 A JP2006316574 A JP 2006316574A JP 2006316574 A JP2006316574 A JP 2006316574A JP 4843469 B2 JP4843469 B2 JP 4843469B2
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邦仁 鈴木
啓之 鈴木
博文 本白水
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本発明は、超伝導磁石装置を用いた磁気共鳴イメージング(以下、ＭＲＩと称す)装置に関する。   The present invention relates to a magnetic resonance imaging (hereinafter referred to as MRI) apparatus using a superconducting magnet apparatus.

ＭＲＩ装置は、生体を構成する水素原子の水素原子核の核磁気共鳴（Nuclear Magnetic Resonance、以下ＮＭＲと称す）現象が、生体内の組織によって異なることを利用して、生体組織を画像化するものであり、組織毎に異なる共鳴の強さや、共鳴の時間的変化の速さが画像の位置毎のコントラストとして現われる。   An MRI apparatus images a living tissue by utilizing the fact that the nuclear magnetic resonance (hereinafter referred to as NMR) phenomenon of hydrogen nuclei of hydrogen atoms constituting a living body varies depending on the tissue in the living body. In addition, the strength of resonance that differs for each tissue and the speed of temporal change in resonance appear as contrast for each position of the image.

ＭＲＩ装置では、ＮＭＲ現象により水素原子核スピンが放出する電磁波を計測し、その電磁波を信号として演算処理することで、生体を水素原子核密度によって断層像化することができる。水素原子核スピンが放出する電磁波による電磁場の強度は、生体をおく検査領域の静磁場の強度に比例するため、高強度の静磁場を生成できる超伝導磁石装置が用いられている。   In the MRI apparatus, a living body can be formed into a tomographic image by the density of hydrogen nuclei by measuring an electromagnetic wave emitted by a hydrogen nucleus spin due to an NMR phenomenon and performing arithmetic processing using the electromagnetic wave as a signal. Since the strength of the electromagnetic field generated by the electromagnetic waves emitted by the hydrogen nuclear spins is proportional to the strength of the static magnetic field in the examination region where the living body is placed, a superconducting magnet device that can generate a high-strength static magnetic field is used.

また、ＭＲＩ装置には、傾斜磁場コイルと高周波照射コイルとが用いられている。傾斜磁場コイルが、検査領域内の位置情報を得るために検査領域の静磁場に重畳する形で磁場を空間的に変化させた傾斜磁場を発生させ、高周波照射コイルが、ＮＭＲ現象を引き起こすための共鳴周波数の電磁波を印加することで、検査領域内の微小領域ごとに水素原子核スピンが放出する電磁波を計測することができる。   The MRI apparatus uses a gradient magnetic field coil and a high-frequency irradiation coil. The gradient magnetic field coil generates a gradient magnetic field that spatially changes the magnetic field so as to be superimposed on the static magnetic field of the examination region in order to obtain position information in the examination region, and the high-frequency irradiation coil causes the NMR phenomenon. By applying an electromagnetic wave having a resonance frequency, it is possible to measure the electromagnetic wave emitted by the hydrogen nuclear spin for each minute region in the inspection region.

傾斜磁場コイルは、傾斜磁場を発生するためにパルス状の電流が流されると、超伝導磁石装置により生成された静磁場により、ローレンツ力が作用し振動する。仮に、この振動が、超伝導磁石装置の静磁場発生源である超伝導コイルにまで伝達し、超伝導コイルを振動させるとすると、超伝導コイルはミクロンオーダーの振幅の振動によっても静磁場は時間的に変動するので、ＭＲＩ装置の断層像に悪影響を与える。このため、ＭＲＩ装置では、傾斜磁場コイルの振動が超伝導コイルに伝わり難い構造が採用されている。   When a pulsed current is applied to generate a gradient magnetic field, the gradient magnetic field coil vibrates due to the Lorentz force due to the static magnetic field generated by the superconducting magnet device. If this vibration is transmitted to the superconducting coil, which is the source of the static magnetic field of the superconducting magnet device, and the superconducting coil is vibrated, the superconducting coil is time-consuming even if the amplitude of the micron order is vibrated. Therefore, the tomographic image of the MRI apparatus is adversely affected. For this reason, the MRI apparatus employs a structure in which the vibration of the gradient magnetic field coil is not easily transmitted to the superconducting coil.

一方、ＭＲＩ装置は、工場で製造され、病院等で稼働し被検者の診断に用いられるので、工場と病院間を輸送しなければならない。輸送時には、道路の路面状況等による衝撃や、船積みでのクレーンやフォークリフト作業による衝撃が発生するが、このような衝撃が発生しても、ＭＲＩ装置は内蔵された超伝導コイルを支持しなければならない。一般に、堅牢に支持しようとすると、その支持体を伝わり振動は伝わりやすくなると考えられ、超伝導コイルに稼働時の傾斜磁場コイルの振動が伝わることなく、超伝導コイルを輸送時の衝撃にも耐えるように堅牢に支持できる支持構造は提案されていなかった。   On the other hand, the MRI apparatus is manufactured in a factory, operates in a hospital, etc., and is used for diagnosis of a subject. Therefore, the MRI apparatus must be transported between the factory and the hospital. During transportation, impacts due to road surface conditions, etc., and impacts caused by crane and forklift operations during shipping occur. Even if such impacts occur, the MRI apparatus must support the built-in superconducting coil. Don't be. In general, if you try to support it firmly, it is thought that vibration will be transmitted easily through the support, and the vibration of the gradient coil during operation will not be transmitted to the superconducting coil, and the superconducting coil will also withstand the impact during transportation Thus, a support structure that can be supported firmly has not been proposed.

なお、永久磁石を用いたＭＲＩ装置において、輸送時に永久磁石の支持体が変形するのを抑制する構造が提案されている（例えば、特許文献１参照）。
特開２００２−３２５７４３号公報 In addition, in the MRI apparatus using a permanent magnet, the structure which suppresses that a support body of a permanent magnet deform | transforms at the time of transport is proposed (for example, refer patent document 1).
JP 2002-325743 A

本発明は前記の問題点を解決しようとするもので、その目的は、稼働時には超伝導コイルに傾斜磁場コイルの振動を伝えず、輸送時には超伝導コイルを輸送時の衝撃にも耐えるように支持するＭＲＩ装置を提供することにある。   The present invention is intended to solve the above-mentioned problems, and its purpose is not to transmit the vibration of the gradient magnetic field coil to the superconducting coil during operation, but to support the superconducting coil to withstand the impact during transportation during transportation. An MRI apparatus is provided.

前記目的を達成するために、本発明のＭＲＩ装置は、所定の電流を流して検査領域に静磁場を発生させる超伝導コイルと、前記超伝導コイルを支持し前記超伝導コイルを冷媒と共に収納するコイル容器と、前記コイル容器を包囲し内部が真空に保持された真空容器とを有するＭＲＩ装置において、前記コイル容器を断熱支持可能な第１断熱支持部と、前記真空容器の内側において前記第１断熱支持部に固定可能であり前記真空容器を貫通する貫通支持部とを有し、前記真空容器の外側において、前記貫通支持部と前記真空容器とを締結可能であり、
そして、前記貫通支持部は、常時、前記第１断熱支持部に固定されているか、
または、前記第１断熱支持部は、一端が前記コイル容器に固定され、他端が前記貫通支持部に固定可能であるパイプまたは棒であり、前記第１断熱支持部の軸方向の延長線が互いに交わる点が、前記貫通支持部の内部に位置しているか、
または、前記第１断熱支持部は、一端が前記コイル容器に固定され、他端が前記貫通支持部に固定可能であるパイプまたは棒であり、前記第１断熱支持部の軸方向の延長線が互いに交わる配置角度がほぼ９０度であるか、
または、前記コイル容器を包囲するように設けられ、前記第１断熱支持部に断熱支持され、前記第１断熱支持部が貫通する熱シールドを有することを特徴とする。 In order to achieve the above object, an MRI apparatus of the present invention includes a superconducting coil that generates a static magnetic field in an examination region by flowing a predetermined current, supports the superconducting coil, and stores the superconducting coil together with a refrigerant. In an MRI apparatus having a coil container and a vacuum container that surrounds the coil container and is maintained in a vacuum, the first heat insulating support part that can support the coil container in a heat-insulating manner, and the first inside the vacuum container. securable to the heat-insulating supporting part has a through support extending through said vacuum vessel, on the outside of the vacuum vessel, Ri fastenable der and the vacuum container and the through-supporting unit,
And the penetration support part is always fixed to the first heat insulation support part,
Alternatively, the first heat insulating support part is a pipe or a rod having one end fixed to the coil container and the other end fixed to the penetrating support part, and an extension line in the axial direction of the first heat insulating support part. The points where they intersect each other are located inside the penetration support part,
Alternatively, the first heat insulating support part is a pipe or a rod having one end fixed to the coil container and the other end fixed to the penetrating support part, and an extension line in the axial direction of the first heat insulating support part. The arrangement angle intersecting each other is approximately 90 degrees,
Or it is provided so that the said coil container may be surrounded, it has a heat shield which is heat-insulated and supported by the said 1st heat insulation support part, and the said 1st heat insulation support part penetrates, It is characterized by the above-mentioned.

このようなＭＲＩ装置によれば、稼働時には超伝導コイルに傾斜磁場コイルの振動を伝えず、輸送時には超伝導コイルを輸送時の衝撃にも耐えるように支持するＭＲＩ装置を提供することができる。   According to such an MRI apparatus, it is possible to provide an MRI apparatus that does not transmit vibration of the gradient magnetic field coil to the superconducting coil during operation and supports the superconducting coil so as to withstand an impact during transportation.

次に、本発明の実施形態について、適宜図面を参照しながら詳細に説明する。なお、各図において、共通する部分には同一の符号を付し重複した説明を省略する。   Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In each figure, common portions are denoted by the same reference numerals, and redundant description is omitted.

（第１の実施形態）
図１に示すように、本発明の第１の実施形態に係るＭＲＩ（磁気共鳴イメージング）装置１としては、オープン型ＭＲＩ装置をあげることができる。オープン型ＭＲＩ装置は、超伝導磁石装置２と、被検体をのせるベッド４と、超伝導磁石装置２とベッド４を制御し被検体の任意の箇所からの核磁気共鳴信号を解析する制御装置３とを有している。超伝導磁石装置２は、内部が真空に保持された真空容器５と、貫通支持部１１と、貫通支持部１１と真空容器５とを締結する締結部１５と、貫通支持部１１の真空容器５に対する高さを調節する調整ねじ１４とを有している。締結部１５は、真空容器５と貫通支持部１１との間に配置され真空容器５と貫通支持部１１との間隔を一定に保つスペーサ１３と、スペーサ１３を貫通し真空容器５と貫通支持部１１とスペーサ１３とを締結する締結ねじ１２とを有している。真空容器５は、上下に配置された一対の第１真空容器５ａと第２真空容器５ｂと、真空連結管５ｃとを有している。第２真空容器５ｂの外周部の上に２本の真空連結管５ｃが立てられ、これらの真空連結管５ｃによって第１真空容器５ａが支持されている。真空連結管５ｃは、第１真空容器５ａと第２真空容器５ｂとに連通しているので、第１真空容器５ａと第２真空容器５ｂの内部の気圧を等しい圧力の減圧状態に設定することができる。 (First embodiment)
As shown in FIG. 1, the MRI (magnetic resonance imaging) apparatus 1 according to the first embodiment of the present invention can be an open MRI apparatus. The open-type MRI apparatus includes a superconducting magnet device 2, a bed 4 on which the subject is placed, a control device that controls the superconducting magnet device 2 and the bed 4 and analyzes a nuclear magnetic resonance signal from an arbitrary part of the subject. 3. The superconducting magnet device 2 includes a vacuum container 5 whose inside is maintained in a vacuum, a penetration support part 11, a fastening part 15 that fastens the penetration support part 11 and the vacuum container 5, and a vacuum container 5 of the penetration support part 11. And an adjusting screw 14 for adjusting the height with respect to. The fastening portion 15 is disposed between the vacuum vessel 5 and the penetration support portion 11, maintains a constant distance between the vacuum vessel 5 and the penetration support portion 11, penetrates the spacer 13, and reaches the vacuum vessel 5 and the penetration support portion. 11 and a fastening screw 12 for fastening the spacer 13 to each other. The vacuum vessel 5 has a pair of first vacuum vessel 5a, second vacuum vessel 5b, and a vacuum connection tube 5c that are arranged vertically. Two vacuum connection pipes 5c are erected on the outer peripheral portion of the second vacuum container 5b, and the first vacuum container 5a is supported by these vacuum connection pipes 5c. Since the vacuum connection pipe 5c communicates with the first vacuum container 5a and the second vacuum container 5b, the atmospheric pressure inside the first vacuum container 5a and the second vacuum container 5b is set to a reduced pressure state of equal pressure. Can do.

オープン型ＭＲＩ装置は、真空連結管５ｃによって離間された第１真空容器５ａと第２真空容器５ｂの間に検査領域９が形成され、この検査領域９に被検体を入れて診療するものであるため、被検体の視界は閉ざされず解放的であり、被検体に好評である。
第１真空容器５ａと第２真空容器５ｂはそれぞれ、Ｚ軸を共通の中心軸とする円柱形である。また、検査領域９を通りＺ軸を法線とする平面に対して、第１真空容器５ａと第２真空容器５ｂは互いに面対称の形状をしている。 In the open MRI apparatus, an examination region 9 is formed between a first vacuum vessel 5a and a second vacuum vessel 5b separated by a vacuum connecting tube 5c, and a subject is put into the examination region 9 for medical care. Therefore, the field of view of the subject is not closed and is open and popular with the subject.
Each of the first vacuum vessel 5a and the second vacuum vessel 5b has a cylindrical shape having the Z axis as a common central axis. The first vacuum vessel 5a and the second vacuum vessel 5b are symmetrical with respect to a plane passing through the inspection region 9 and having the Z axis as a normal line.

図２は、本発明の第１の実施形態に係る超伝導磁石装置２の上方からの透視図であり、図３は、図２のＡ−Ａ方向の断面図である。図４は、図３の貫通支持部１１の周辺の拡大図（輸送時）である。   FIG. 2 is a perspective view from above of the superconducting magnet device 2 according to the first embodiment of the present invention, and FIG. 3 is a cross-sectional view in the AA direction of FIG. FIG. 4 is an enlarged view (at the time of transportation) of the periphery of the penetration support portion 11 of FIG.

図３に示すように、超伝導磁石装置２は、所定の永久電流を流して検査領域９に静磁場を発生させ中心軸がＺ軸に一致する円環状の１対の超伝導コイル６ａ、６ｂと、超伝導コイル６ａ、６ｂを支持し、超伝導コイル６ａ、６ｂを冷媒２２と共に収納するコイル容器８と、コイル容器８を包囲するように設けられた熱シールド７と、コイル容器８と熱シールド７を包囲し内部が真空に保持された真空容器５とを有している。   As shown in FIG. 3, the superconducting magnet device 2 generates a static magnetic field in the inspection region 9 by flowing a predetermined permanent current, and a pair of annular superconducting coils 6 a and 6 b whose central axis coincides with the Z axis. The coil container 8 that supports the superconducting coils 6a and 6b and accommodates the superconducting coils 6a and 6b together with the refrigerant 22, the heat shield 7 provided so as to surround the coil container 8, the coil container 8 and the heat And a vacuum vessel 5 that surrounds the shield 7 and is maintained in a vacuum.

冷媒２２は超伝導コイル６ａ、６ｂを浸して直接冷却している。冷媒２２としては液体ヘリウム（Ｈｅ）が用いられている。コイル容器８は、円環状の超伝導コイル６ａ、６ｂに沿いこれを収納するように、Ｚ軸を中心軸にする円柱状に形成され、容積をできるだけ小さくしている。同様に、熱シールド７は、円柱状のコイル容器８に沿って覆うように、Ｚ軸を中心軸にする円柱状に形成され、表面積をできるだけ小さくして侵入熱を抑制している。   The refrigerant 22 is directly cooled by immersing the superconducting coils 6a and 6b. Liquid helium (He) is used as the coolant 22. The coil container 8 is formed in a cylindrical shape with the Z axis as the central axis so as to be accommodated along the annular superconducting coils 6a and 6b, and the volume thereof is made as small as possible. Similarly, the heat shield 7 is formed in a cylindrical shape having the Z axis as a central axis so as to cover the cylindrical coil container 8 and suppresses intrusion heat by making the surface area as small as possible.

超伝導磁石装置２が、室温の室内に配置されても、真空容器５内が真空になっているので、室内の熱が伝導や対流で、コイル容器８に伝わることはない。また、熱シールド７は、図示していない冷凍機で冷却されることで、真空容器５からの輻射熱を吸収し冷凍機に放出するので、輻射熱でコイル容器８が昇温されることはない。なお、熱シールド７は冷媒２２の温度の極低温と室温との間の中低温に設定すればよい。以上により、超伝導コイル６ａ、６ｂとコイル容器８は冷媒２２の極低温に安定して設定することができる。   Even if the superconducting magnet device 2 is disposed in a room temperature room, the vacuum vessel 5 is in a vacuum, so that the heat in the room is not transmitted to the coil vessel 8 by conduction or convection. Moreover, since the heat shield 7 is cooled by a refrigerator (not shown), it absorbs the radiant heat from the vacuum vessel 5 and releases it to the refrigerator, so that the coil vessel 8 is not heated by the radiant heat. The heat shield 7 may be set to a medium low temperature between the extremely low temperature of the refrigerant 22 and the room temperature. As described above, the superconducting coils 6 a and 6 b and the coil container 8 can be stably set to the cryogenic temperature of the refrigerant 22.

前記超伝導コイル６ａ、６ｂは、上下に対向配置され、それぞれの中心軸がＺ軸に一致し、対をなす第１超伝導コイル６ａと第２超伝導コイル６ｂとを有している。   The superconducting coils 6a and 6b are arranged to face each other in the vertical direction, and have a first superconducting coil 6a and a second superconducting coil 6b that form a pair with the center axis thereof coinciding with the Z axis.

前記コイル容器８は、第１超伝導コイル６ａを内包する第１コイル容器８ａと、第２超伝導コイル６ｂを内包し第１コイル容器８ａから下方に離れた第２コイル容器８ｂと、第１コイル容器８ａと第２コイル容器８ｂとを連結して冷媒２２が通り第１コイル容器８ａを支持し第２コイル容器８ｂに支持されるコイル連結管８ｃとを有している。コイル連結管８ｃは、第１コイル容器８ａと第２コイル容器８ｂの外周部に配置されている。コイル連結管８ｃは、１本でも良いし、２本以上でも良い。   The coil container 8 includes a first coil container 8a enclosing the first superconducting coil 6a, a second coil container 8b enclosing the second superconducting coil 6b and separated downward from the first coil container 8a, and a first coil container 8a. The coil container 8a and the second coil container 8b are connected to each other, and the coil 22 passes through the refrigerant 22 to support the first coil container 8a and to be supported by the second coil container 8b. The coil connection pipe 8c is disposed on the outer periphery of the first coil container 8a and the second coil container 8b. The number of coil connecting pipes 8c may be one, or two or more.

前記熱シールド７は、第１コイル容器８ａを内包する第１熱シールド７ａと、第２コイル容器８ｂを内包し第１熱シールド７ａから離れた第２熱シールド７ｂと、第１熱シールド７ａと第２熱シールド７ｂとを連結しコイル連結管８ｃを内包するシールド連結管７ｃと、熱シールド７を支持するシールド支持部７ｄとを有する。シールド連結管７ｃは、第１熱シールド７ａと第２熱シールド７ｂの外周部に配置されている。シールド連結管７ｃは、コイル連結管８ｃの本数に合わせて、１本でも良いし、２本以上でも良い。   The heat shield 7 includes a first heat shield 7a containing the first coil container 8a, a second heat shield 7b containing the second coil container 8b and separated from the first heat shield 7a, a first heat shield 7a, It has a shield connection pipe 7c that connects the second heat shield 7b and encloses the coil connection pipe 8c, and a shield support portion 7d that supports the heat shield 7. The shield connecting pipe 7c is disposed on the outer periphery of the first heat shield 7a and the second heat shield 7b. The shield connecting pipe 7c may be one or two or more according to the number of the coil connecting pipes 8c.

前記真空容器５は、第１コイル容器８ａと第１熱シールド７ａと第１断熱支持部１６と嵌脱部１８とを内包する第１真空容器５ａと、第２コイル容器８ｂと第２熱シールド７ｂと第２断熱支持部２３、２４とを内包し第１真空容器５ａから下方に離れた第２真空容器５ｂと、第１真空容器５ａと第２真空容器５ｂとを連結し第１真空容器５ａを支持し第２真空容器５ｂに支持されコイル連結管８ｃとシールド連結管７ｃを内包する真空連結管５ｃとを有する。真空連結管５ｃは、第１真空容器５ａと第２真空容器５ｂの外周部に配置されている。真空連結管５ｃは、コイル連結管８ｃの本数に合わせて、１本でも良いし、２本以上でも良い。以上により、検査領域９は、第１真空容器５ａと第２真空容器５ｂと真空連結管５ｃとの間に設けることができる。   The vacuum vessel 5 includes a first vacuum vessel 5a including a first coil vessel 8a, a first heat shield 7a, a first heat insulating support portion 16, and a fitting / removing portion 18, a second coil vessel 8b, and a second heat shield. 7b and the second heat insulating support portions 23 and 24, the second vacuum container 5b separated downward from the first vacuum container 5a, and the first vacuum container 5a and the second vacuum container 5b are connected to each other. 5a is supported by the second vacuum vessel 5b, and has a coil connection tube 8c and a vacuum connection tube 5c containing the shield connection tube 7c. The vacuum connection pipe 5c is disposed on the outer peripheral portion of the first vacuum container 5a and the second vacuum container 5b. The vacuum connection pipe 5c may be one or two or more according to the number of the coil connection pipes 8c. As described above, the inspection region 9 can be provided between the first vacuum vessel 5a, the second vacuum vessel 5b, and the vacuum connection tube 5c.

なお、第１超伝導コイル６ａと、第１コイル容器８ａと、第１熱シールド７ａと、第１真空容器５ａとにより、第１クライオスタット２１ａを構成していると考えることができる。同様に、第２超伝導コイル６ｂと、第２コイル容器８ｂと、第２熱シールド７ｂと、第２真空容器５ｂとにより、第２クライオスタット２１ｂを構成していると考えることができる。また、コイル連結管８ｃと、シールド連結管７ｃと、真空連結管５ｃとにより、連結柱２１ｃを構成していると考えることができる。第１クライオスタット２１ａと第２クライオスタット２１ｂとは、連結柱２１ｃにより、互いに離間して配置されている。   The first superconducting coil 6a, the first coil container 8a, the first heat shield 7a, and the first vacuum container 5a can be considered to constitute the first cryostat 21a. Similarly, it can be considered that the second cryostat 21b is constituted by the second superconducting coil 6b, the second coil container 8b, the second heat shield 7b, and the second vacuum container 5b. Further, it can be considered that the connecting column 21c is constituted by the coil connecting tube 8c, the shield connecting tube 7c, and the vacuum connecting tube 5c. The first cryostat 21a and the second cryostat 21b are spaced apart from each other by a connecting column 21c.

第１真空容器５ａと第２真空容器５ｂの互いに対向する壁面にはそれぞれ、検査部２６と検査部２７とが設けられている。検査部２６、２７毎に、傾斜磁場コイルと高周波照射コイルとを有している。傾斜磁場コイルと高周波照射コイルとは、第１真空容器５ａと第２真空容器５ｂとに固定されている。ＭＲＩ装置１は、ＮＭＲ現象により水素原子核スピンが放出する核磁気共鳴信号を計測し、その核磁気共鳴信号を演算処理することで、被検体内を水素原子核密度によって断層像化する。その際に、まず、超伝導コイル６ａ、６ｂに永久電流を流し、検査領域９に静磁場を生成する。次に、傾斜磁場コイルは、検査領域９内の位置情報を得る目的で、磁場を空間的に変化させた傾斜磁場を検査領域９に印加する。さらに、高周波照射コイルは、ＮＭＲ現象を引起すための共鳴周波数の電磁波を検査領域９に印加する。これらにより、検査領域９内の微小領域ごとに水素原子核スピンが放出する核磁気共鳴信号を計測し、その核磁気共鳴信号を演算処理することで、被検体体内を水素原子核密度によって断層像化することができる。   An inspection part 26 and an inspection part 27 are provided on the mutually opposing wall surfaces of the first vacuum container 5a and the second vacuum container 5b, respectively. Each of the inspection units 26 and 27 has a gradient magnetic field coil and a high-frequency irradiation coil. The gradient magnetic field coil and the high-frequency irradiation coil are fixed to the first vacuum vessel 5a and the second vacuum vessel 5b. The MRI apparatus 1 measures a nuclear magnetic resonance signal emitted from a hydrogen nuclear spin due to an NMR phenomenon, and performs an arithmetic process on the nuclear magnetic resonance signal to form a tomographic image of the inside of a subject based on the hydrogen nuclear density. At that time, first, a permanent current is passed through the superconducting coils 6 a and 6 b to generate a static magnetic field in the inspection region 9. Next, the gradient magnetic field coil applies a gradient magnetic field in which the magnetic field is spatially changed to the inspection region 9 for the purpose of obtaining positional information in the inspection region 9. Further, the high frequency irradiation coil applies an electromagnetic wave having a resonance frequency for causing the NMR phenomenon to the inspection region 9. As a result, the nuclear magnetic resonance signal emitted from the hydrogen nuclear spin is measured for each micro area in the examination area 9 and the nuclear magnetic resonance signal is processed to form a tomographic image of the inside of the subject by the hydrogen nuclear density. be able to.

超伝導コイル６ａ、６ｂ、コイル容器８、熱シールド７及び真空容器５は互いの位置関係を保持するために、断熱支持で各位置関係を健全に保ち、且つ、高い断熱性能を有した支持を実現している。傾斜磁場を発生させるために傾斜磁場コイルにパルス状の電流を通電すると、傾斜磁場コイルは静磁場中にあるため、電流が流れる傾斜磁場コイルにローレンツ力が作用し、傾斜磁場コイルに振動を誘発する。この振動は、傾斜磁場コイルを固定する真空容器５に伝達し、真空容器５を振動させる。   The superconducting coils 6a and 6b, the coil container 8, the heat shield 7 and the vacuum container 5 are each provided with a heat insulating support to maintain a healthy positional relationship and maintain a high heat insulating performance in order to maintain the mutual positional relationship. Realized. When a pulsed current is applied to a gradient coil to generate a gradient magnetic field, the gradient coil is in a static magnetic field, so Lorentz force acts on the gradient coil in which current flows, and induces vibration in the gradient coil. To do. This vibration is transmitted to the vacuum vessel 5 that fixes the gradient magnetic field coil, and causes the vacuum vessel 5 to vibrate.

真空容器５が振動するといっても、全体が振動するわけでなく、真空容器５の自重等により床２５に圧接される真空容器５の底部は振動しにくい。そこで、第２断熱支持部２３、２４は、真空容器５（第２真空容器５ｂ）の底部に固定され、コイル容器８と熱シールド７とを断熱支持している。真空容器５（第２真空容器５ｂ）の底部が振動しにくいので、第２断熱支持部２３、２４もほとんど振動せず、真空容器５の振動が第２断熱支持部２３、２４を介してコイル容器８と熱シールド７さらには超伝導コイル６ａ、６ｂに伝達することはほとんどない。   Even if the vacuum vessel 5 vibrates, it does not vibrate as a whole, and the bottom of the vacuum vessel 5 pressed against the floor 25 due to its own weight or the like hardly vibrates. Therefore, the second heat insulating support portions 23 and 24 are fixed to the bottom portion of the vacuum vessel 5 (second vacuum vessel 5b) and support the coil vessel 8 and the heat shield 7 with heat insulation. Since the bottom of the vacuum vessel 5 (second vacuum vessel 5b) is difficult to vibrate, the second heat insulating support portions 23 and 24 hardly vibrate, and the vibration of the vacuum vessel 5 is coiled via the second heat insulating support portions 23 and 24. There is almost no transmission to the container 8, the heat shield 7, and the superconducting coils 6a, 6b.

しかしながら、第２断熱支持部２３、２４だけでは、片持ちに近い支持体系となり、輸送時に衝撃を受けると、熱シールド７とコイル容器８が倒れ込み、熱シールド７とコイル容器８の上部が大きく移動し、第２断熱支持部２３、２４に曲げや軸力で過大な荷重負荷が生じ大きく変形したり損傷を受けたりすると考えられる。   However, the second heat insulating support portions 23 and 24 alone provide a support system that is close to a cantilever, and when subjected to an impact during transportation, the heat shield 7 and the coil container 8 fall down, and the upper portions of the heat shield 7 and the coil container 8 move greatly. However, it is considered that an excessive load is applied to the second heat insulating support portions 23 and 24 due to bending or axial force, resulting in large deformation or damage.

そこで、図３と図４（ａ）に示すように、第１の実施形態では、コイル容器８（第１コイル容器８ａ）と熱シールド７（第１熱シールド７ａ）との上部に固定されコイル容器８と熱シールド７を断熱支持可能な第１断熱支持部１６と、真空容器５（第１真空容器５ａ）とコイル容器８（第１コイル容器８ａ）と熱シールド７（第１熱シールド７ａ）との上部付近に配置され、真空容器５の内側において第１断熱支持部１６に固定可能であり、真空容器５（第１真空容器５ａ）の上部を貫通する貫通支持部１１とが設けられている。さらに、真空容器５（第１真空容器５ａ）の上部の外側に配置可能であり、貫通支持部１１と真空容器５とを締結可能である締結部１５と、第１断熱支持部１６に固定され貫通支持部１１を嵌脱する嵌脱部１８とが設けられている。締結部１５は、真空容器５と貫通支持部１１との間に配置可能なスペーサ１３と、スペーサ１３を貫通し、真空容器５と貫通支持部１１とを締結可能な締結ねじ１２とを有している。貫通支持部１１は、嵌脱部１８に対しての高さを変えることで、貫通支持部１１の円柱部が円環状の嵌脱部１８に嵌め込まれて接合したり脱離して引き離したりすることができる。貫通支持部１１が嵌脱部１８に嵌め込まれることで、貫通支持部１１を嵌脱部１８および第１断熱支持部１６に固定することができる。   Therefore, as shown in FIG. 3 and FIG. 4A, in the first embodiment, the coil is fixed to the upper part of the coil container 8 (first coil container 8a) and the heat shield 7 (first heat shield 7a). The first heat insulating support 16 capable of supporting the container 8 and the heat shield 7 in a heat insulating manner, the vacuum container 5 (first vacuum container 5a), the coil container 8 (first coil container 8a), and the heat shield 7 (first heat shield 7a). ), And can be fixed to the first heat insulating support portion 16 inside the vacuum vessel 5, and a through support portion 11 penetrating the upper portion of the vacuum vessel 5 (first vacuum vessel 5 a) is provided. ing. Furthermore, the vacuum vessel 5 (first vacuum vessel 5a) can be disposed outside the upper portion, and is fixed to the fastening portion 15 that can fasten the penetration support portion 11 and the vacuum vessel 5, and the first heat insulation support portion 16. A fitting / removal portion 18 for fitting / removing the penetration support portion 11 is provided. The fastening portion 15 includes a spacer 13 that can be disposed between the vacuum vessel 5 and the penetration support portion 11, and a fastening screw 12 that passes through the spacer 13 and can fasten the vacuum vessel 5 and the penetration support portion 11. ing. By changing the height of the penetration support portion 11 with respect to the fitting / removal portion 18, the cylindrical portion of the penetration support portion 11 is fitted into the annular fitting / removal portion 18 to be joined or detached and separated. Can do. By fitting the penetration support part 11 into the fitting / removing part 18, the penetration support part 11 can be fixed to the fitting / removing part 18 and the first heat insulating support part 16.

真空容器５（第１真空容器５ａ）の上部には開口が設けられ、貫通支持部１１は、その開口を貫通している。開口において、真空容器５（第１真空容器５ａ）と貫通支持部１１とは接しておらず、すきま１９が開口の全周にわたり形成されている。   An opening is provided in the upper part of the vacuum vessel 5 (first vacuum vessel 5a), and the penetration support portion 11 penetrates the opening. In the opening, the vacuum vessel 5 (first vacuum vessel 5a) and the through support portion 11 are not in contact with each other, and a gap 19 is formed over the entire circumference of the opening.

第１断熱支持部１６は、第２断熱支持部２３、２４と同様に、室温の嵌脱部１８や貫通支持部１１から液体ヘリウム温度のコイル容器８を支持するため、嵌脱部１８からコイル容器８への熱伝導を減らすような素材で構成されている。例えば、図４（ｂ）に示すように、第１断熱支持部１６として低熱伝導率の繊維強化型プラスチック（ＦＲＰ）パイプを用いる。パイプ形状の替わりに板形状または棒形状をしたＦＲＰを用いてもよい。第１断熱支持部１６は、Ｚ軸と垂直な水平方向に寝かされて設置される。第１断熱支持部１６は、一端がコイル容器８に固定され、もう１つの一端が嵌脱部１８に固定され貫通支持部１１を嵌脱部１８に嵌めることで貫通支持部１１に固定可能である。   Similarly to the second heat insulating support portions 23 and 24, the first heat insulating support portion 16 supports the coil container 8 at the liquid helium temperature from the room temperature fitting / removal portion 18 and the penetration support portion 11. It is made of a material that reduces heat conduction to the container 8. For example, as shown in FIG. 4B, a low thermal conductivity fiber reinforced plastic (FRP) pipe is used as the first heat insulating support 16. An FRP having a plate shape or a rod shape may be used instead of the pipe shape. The first heat insulating support portion 16 is laid in the horizontal direction perpendicular to the Z axis. One end of the first heat insulating support portion 16 is fixed to the coil container 8, the other end is fixed to the fitting / removing portion 18, and the penetration supporting portion 11 is fitted to the fitting / removing portion 18, so that the first heat insulating supporting portion 16 can be fixed to the penetration supporting portion 11. is there.

なお、第１断熱支持部１６の長さ方向の中間地点は、第２断熱支持部２３、２４と同様に、サーマルアンカになっており、この中間地点で、熱シールド７は第１断熱支持部１６に支持している。第１断熱支持部１６の中間地点の温度は、熱シールド７の温度に設定されるので、第１断熱支持部１６の一端から他端までの室温から極低温にいたる温度プロファイルを装置によらず一定にすることができる。第１断熱支持部１６は、その中間地点で熱シールド７を貫通している。第１断熱支持部１６の中間地点より低温側では、第１断熱支持部１６を覆うために、袋状のシールド支持部７ｄが設けられている。   In addition, the intermediate point of the length direction of the 1st heat insulation support part 16 is a thermal anchor similarly to the 2nd heat insulation support parts 23 and 24, and the heat shield 7 is the 1st heat insulation support part in this intermediate point. 16 is supported. Since the temperature of the intermediate point of the first heat insulating support 16 is set to the temperature of the heat shield 7, the temperature profile from one end to the other end of the first heat insulating support 16 from the room temperature to the extremely low temperature is not dependent on the device. Can be constant. The 1st heat insulation support part 16 has penetrated the heat shield 7 in the intermediate point. A bag-shaped shield support portion 7 d is provided on the low temperature side of the intermediate point of the first heat insulation support portion 16 in order to cover the first heat insulation support portion 16.

真空容器５（第１真空容器５ａ）の上部には、真空容器５（第１真空容器５ａ）と貫通支持部１１との間をシールするシール部１７が設けられている。シール部１７によれば、真空容器５内の真空を保持することができる。なお、貫通支持部１１は、真空容器５に対して上下動するので、このような上下動においても、シール部１７は、真空容器５内の真空を保持しなければならない。以上のようなシール部１７としてはベローズを用いることができる。   A seal portion 17 that seals between the vacuum vessel 5 (first vacuum vessel 5a) and the penetration support portion 11 is provided on the upper portion of the vacuum vessel 5 (first vacuum vessel 5a). According to the seal part 17, the vacuum in the vacuum vessel 5 can be maintained. In addition, since the penetration support part 11 moves up and down with respect to the vacuum container 5, the seal part 17 must hold | maintain the vacuum in the vacuum container 5 also in such up-and-down movement. A bellows can be used as the sealing portion 17 as described above.

また、真空容器５（第１真空容器５ａ）の上部には、真空容器５と貫通支持部１１との間隔を調整可能な調整ねじ１４が設けられている。貫通支持部１１を真空容器５に対して上下動させる際の調整を容易に行うことができる。調整方法は、後述する。   In addition, an adjustment screw 14 capable of adjusting the distance between the vacuum container 5 and the penetration support portion 11 is provided on the upper part of the vacuum container 5 (first vacuum container 5a). Adjustment when the penetrating support portion 11 is moved up and down with respect to the vacuum vessel 5 can be easily performed. The adjustment method will be described later.

ＭＲＩ装置１を輸送するときは、図３に示すように、貫通支持部１１は嵌脱部１８に嵌められて第１断熱支持部１６に固定し、締結部１５により貫通支持部１１と真空容器５とを締結しておく。一方、ＭＲＩ装置１が稼働しているときは、貫通支持部１１が第１断熱支持部１６に固定されないように、貫通支持部１１は嵌脱部１８から脱離され第１断熱支持部１６から離れ開放される。また、締結部１５により貫通支持部１１と真空容器５とは締結しておく。   When transporting the MRI apparatus 1, as shown in FIG. 3, the penetration support portion 11 is fitted to the fitting / removal portion 18 and fixed to the first heat insulation support portion 16, and the penetration support portion 11 and the vacuum container are fastened by the fastening portion 15. 5 is concluded. On the other hand, when the MRI apparatus 1 is operating, the penetration support portion 11 is detached from the fitting / removal portion 18 so that the penetration support portion 11 is not fixed to the first heat insulation support portion 16. Opened away. Further, the penetration support part 11 and the vacuum vessel 5 are fastened by the fastening part 15.

輸送時には、第２断熱支持部２３、２４によって熱シールド７とコイル容器８の下部を支持するだけでなく、第１断熱支持部１６によっても熱シールド７とコイル容器８の上部を支持しているので、片持ちの支持体系とは異なり、輸送時に衝撃を受けても、熱シールド７とコイル容器８が倒れ込まず、熱シールド７とコイル容器８の上部が移動しない。このため、第２断熱支持部２３、２４に曲げや軸力で過大な荷重負荷が生じず、変形や損傷を受けないで熱シールド７とコイル容器８を支持することができる。   At the time of transportation, not only the heat shield 7 and the lower part of the coil container 8 are supported by the second heat insulating support parts 23 and 24 but also the upper part of the heat shield 7 and the coil container 8 is supported by the first heat insulating support part 16. Therefore, unlike the cantilever support system, even if an impact is applied during transportation, the heat shield 7 and the coil container 8 do not fall down, and the upper part of the heat shield 7 and the coil container 8 do not move. For this reason, an excessive load is not generated by bending or axial force on the second heat insulating support portions 23 and 24, and the heat shield 7 and the coil container 8 can be supported without being deformed or damaged.

また、稼働時には、貫通支持部１１は嵌脱部１８から脱離され第１断熱支持部１６から離されるので、貫通支持部１１は第１断熱支持部１６に固定されず、傾斜磁場コイルの振動が真空容器５さらには貫通支持部１１に伝達しても、貫通支持部１１から第１断熱支持部１６には伝達することはない。なお、振動の伝達を遮断するだけでなく、熱の伝導も遮断することができる。   Moreover, since the penetration support part 11 is detached from the fitting / removal part 18 and separated from the first heat insulation support part 16 during operation, the penetration support part 11 is not fixed to the first heat insulation support part 16 and vibration of the gradient magnetic field coil is performed. However, even if it is transmitted to the vacuum vessel 5 and further to the penetration support portion 11, it is not transmitted from the penetration support portion 11 to the first heat insulation support portion 16. Note that not only the transmission of vibration can be interrupted, but also the conduction of heat can be interrupted.

また、シール部１７を用いることで、貫通支持部１１の嵌脱部１８に対する固定や開放を、真空容器５を真空に保持したままで行うことができる。稼働時や輸送時はもちろん、貫通支持部１１の上下動の調整時も、真空容器５を真空に保持することができる。真空を保持しない場合と比べ、輸送先での作業時間を低減できる。   Further, by using the seal portion 17, the penetration support portion 11 can be fixed to or released from the fitting / removal portion 18 while the vacuum vessel 5 is kept in a vacuum. The vacuum vessel 5 can be held in vacuum not only during operation and transportation, but also when adjusting the vertical movement of the penetration support portion 11. Compared to the case where no vacuum is maintained, the work time at the transportation destination can be reduced.

図２に示すように、貫通支持部１１は、複数個配置してもよく、例えば図２に示すように２個配置することができる。複数個にすることで、一箇所あたりの荷重負荷が軽減され、一箇所当りの貫通支持部１１の形状を小型化することができる。   As shown in FIG. 2, a plurality of penetration support portions 11 may be arranged. For example, two penetration support portions 11 can be arranged as shown in FIG. 2. By using a plurality, the load load per location can be reduced, and the shape of the penetration support portion 11 per location can be reduced.

また、貫通支持部１１の１つは、嵌脱部１８を介して複数本の第１断熱支持部１６を固定可能である。例えば図２に示すように２本設けることができる。複数本にすることで、一本あたりの荷重負荷が軽減され、一本当りの第１断熱支持部１６の形状を小型化することができる。また、このようなに複数本の第１断熱支持部１６は、軸方向の延長線が互いに交わる配置角度がほぼ９０度に設定されている。輸送時の衝撃による熱シールド７とコイル容器８の動きが、どの方向の径方向であっても抑制することができる。   Further, one of the penetration support portions 11 can fix a plurality of first heat insulation support portions 16 via the fitting / removal portions 18. For example, two can be provided as shown in FIG. By making it into multiple pieces, the load load per piece is reduced and the shape of the 1st heat insulation support part 16 per piece can be reduced in size. In addition, in the plurality of first heat insulating support portions 16 as described above, the arrangement angle at which the extension lines in the axial direction intersect with each other is set to approximately 90 degrees. The movement of the heat shield 7 and the coil container 8 due to the impact during transportation can be suppressed in any radial direction.

第１断熱支持部１６は、直線状のパイプまたは棒であり、第１断熱支持部１６の軸方向の延長線が互いに交わる点が貫通支持部１１の内部に位置している。貫通支持部１１と嵌脱部１８に生じる輸送時の衝撃による曲げモーメントを小さくすることができる。また、第１断熱支持部１６の軸方向を、コイル容器８の周方向に沿わせることで、熱シールド７とコイル容器８の冷却による収縮変形を、第１断熱支持部１６のバネ定数の弱い軸直角方向変形で逃がすことができ、更に、輸送時の衝撃による熱シールド７とコイル容器８の径方向の動きだけでなく周方向の動きも抑制することができる。   The first heat insulating support portion 16 is a straight pipe or rod, and the point where the extension lines in the axial direction of the first heat insulating support portion 16 intersect with each other is located inside the penetration support portion 11. It is possible to reduce a bending moment due to an impact at the time of transportation that occurs in the penetration support portion 11 and the fitting / removal portion 18. Further, by causing the axial direction of the first heat insulating support portion 16 to be along the circumferential direction of the coil container 8, shrinkage deformation due to cooling of the heat shield 7 and the coil container 8 is reduced, and the spring constant of the first heat insulating support portion 16 is weak. It is possible to escape by deformation in a direction perpendicular to the axis, and it is possible to suppress not only the radial movement of the heat shield 7 and the coil container 8 due to the impact during transportation but also the circumferential movement.

なお、調整ねじ１４の配置位置は、貫通支持部１１上において、締結ねじ１２に対して外側であるが、これに限らず、内側に配置されていてもよいし、調整ねじ１４と締結ねじ１２とが同一半径上に配置されていてもよい。また、調整ねじ１４の本数は、貫通支持部１１に無理な負荷を加えることなく上昇させるために、３本以上が好ましく、締結ねじ１２の本数も、貫通支持部１１に無理な負荷を加えることなく真空容器５に締結するために、３本以上が好ましい。なお、調整ねじ１４と締結ねじ１２とは、１つの貫通支持部１１上において、同一の本数である必要はなく、周方向に同ピッチである必要もない。   In addition, although the arrangement position of the adjustment screw 14 is on the outer side with respect to the fastening screw 12 on the penetration support portion 11, it is not limited thereto, and may be arranged on the inner side, or the adjustment screw 14 and the fastening screw 12. May be arranged on the same radius. In addition, the number of adjusting screws 14 is preferably three or more in order to increase the penetrating support portion 11 without applying an excessive load, and the number of the fastening screws 12 also applies an excessive load to the penetrating support portion 11. 3 or more are preferable for fastening to the vacuum vessel 5 without any problem. Note that the adjustment screw 14 and the fastening screw 12 do not have to be the same number on the one through-supporting portion 11, and need not have the same pitch in the circumferential direction.

貫通支持部１１を真空容器５に対して上下動させる際の調整方法について説明する。   An adjustment method when the penetration support part 11 is moved up and down with respect to the vacuum vessel 5 will be described.

図４の貫通支持部１１は、輸送時の状態を示している。輸送時から稼動時へ移行するためには、貫通支持部１１を真空容器５から抜くように上方に移動させる。   The penetration support part 11 of FIG. 4 has shown the state at the time of transport. In order to shift from transportation to operation, the penetrating support 11 is moved upward so as to be removed from the vacuum vessel 5.

図５に示すように、まず、調整ねじ１４を真空容器５に押し当てたまま、真空容器５と貫通支持部１１との締結を解除するために、締結ねじ１２を取り外す。大気圧により貫通支持部１１は真空容器５側に引き付けられている。   As shown in FIG. 5, first, the fastening screw 12 is removed in order to release the fastening between the vacuum vessel 5 and the penetration support portion 11 while the adjustment screw 14 is pressed against the vacuum vessel 5. The penetration support part 11 is attracted to the vacuum vessel 5 side by atmospheric pressure.

調整ねじ１４を回して、真空容器５と貫通支持部１１との間に押し出す。このことにより、貫通支持部１１は真空容器５から抜かれるように上昇する。この上昇により、貫通支持部１１は、嵌脱部１８から抜かれて脱離する。また、シール部１７のベローズも伸びる。真空容器５と貫通支持部１１とに挟まれなくなったスペーサ１３を除去する。   The adjusting screw 14 is turned and pushed out between the vacuum vessel 5 and the penetration support portion 11. As a result, the penetrating support portion 11 rises so as to be pulled out of the vacuum vessel 5. By this rise, the penetration support part 11 is extracted from the fitting / removal part 18 and detached. Moreover, the bellows of the seal part 17 also extends. The spacer 13 that is no longer sandwiched between the vacuum vessel 5 and the penetration support portion 11 is removed.

最後に、図６に示すように、スペーサ１３よりも高さの高いスペーサ１３ａを、真空容器５と貫通支持部１１との間に挿入し、締結ねじ１２ａをスペーサ１３ａに通したまま、締結ねじ１２ａで、真空容器５と貫通支持部１１とを締結する。以上で、輸送時から稼動時へ移行するための調整が完了し、貫通支持部１１は稼働時の状態になる。この一連の調整はシール部１７により真空容器５の内部を真空を保持したまま行えるので、調整の前後で真空引きや超伝導コイルの温度を室温まで上げたり下げたりする必要がない。なお、今の説明とは逆の稼働時から輸送時へ移行するための調整は、逆の手順をたどればよい。また、調整ねじ１４に替えて、ジャッキを用いてもよい。   Finally, as shown in FIG. 6, a spacer 13a having a height higher than that of the spacer 13 is inserted between the vacuum vessel 5 and the penetrating support portion 11, and the fastening screw 12a is passed through the spacer 13a and the fastening screw is inserted. At 12a, the vacuum vessel 5 and the penetration support portion 11 are fastened. With the above, the adjustment for shifting from the transportation time to the operation time is completed, and the penetrating support portion 11 is in the state of operation. This series of adjustments can be performed with the seal portion 17 while keeping the vacuum inside the vacuum vessel 5, so there is no need to evacuate or raise or lower the temperature of the superconducting coil to room temperature before and after the adjustment. In addition, the adjustment for shifting from the time of operation reverse to the present explanation to the time of transportation may be performed in the reverse order. Further, a jack may be used instead of the adjusting screw 14.

図６に示すように、稼働時においては、貫通支持部１１と嵌脱部１８とは離れているので、真空容器５に伝わった振動が、貫通支持部１１と嵌脱部１８と第１断熱支持部１６を経て、コイル容器８と熱シールド７に伝わることはなく、ＭＲＩ像に悪影響を及ぼすことはない。   As shown in FIG. 6, during operation, the penetration support portion 11 and the fitting / removing portion 18 are separated from each other, so that vibration transmitted to the vacuum vessel 5 is affected by the penetration support portion 11, the fitting / detaching portion 18 and the first heat insulation. It does not travel to the coil container 8 and the heat shield 7 via the support portion 16, and does not adversely affect the MRI image.

（第１の実施形態の変形例）
図７に示すように、本発明の第１の実施形態の変形例に係るＭＲＩ装置は、第１の実施形態のＭＲＩ装置１と比較して、シール部１７のベローズが、軸シール２８になっている点が異なっている。また、貫通支持部１１の嵌脱部１８に嵌めこむ側の端面がテーパ形状になっている点が異なっている。また、嵌脱部１８の嵌め込まれる側の端面がラウンド形状になっている点が異なっている。調整ねじ１４が省かれている点が異なっている。調整ねじ１４がない場合は、前記のようにジャッキを用いればよい。 (Modification of the first embodiment)
As shown in FIG. 7, in the MRI apparatus according to the modification of the first embodiment of the present invention, the bellows of the seal portion 17 is a shaft seal 28 compared to the MRI apparatus 1 of the first embodiment. Is different. Moreover, the point by which the end surface by the side of fitting to the fitting / removal part 18 of the penetration support part 11 is a taper shape differs. Moreover, the point by which the end surface of the side by which the fitting / removal part 18 is fitted is round shape differs. The difference is that the adjusting screw 14 is omitted. If there is no adjustment screw 14, a jack may be used as described above.

シール部１７に軸シール２８を用いることで、真空容器５内を真空に保持したまま、貫通支持部１１を真空容器５に対して上下動させることができるだけでなく、万が一、シール部１７が損傷しても、溶接で取り付けたベローズに比べて、貫通支持部１１の軸部に巻きつけた軸シール２８であれば、迅速に交換ができ、ＭＲＩ装置の復旧までの時間短縮が望める。   By using the shaft seal 28 for the seal portion 17, the penetration support portion 11 can be moved up and down with respect to the vacuum vessel 5 while keeping the inside of the vacuum vessel 5 in a vacuum, and the seal portion 17 is damaged by any chance. Even if it is compared with the bellows attached by welding, if it is the shaft seal 28 wound around the shaft part of the penetration support part 11, replacement | exchange can be carried out rapidly and it can hope for shortening of the time until restoration of an MRI apparatus.

また、貫通支持部１１の嵌脱部１８に嵌めこむ側の端面をテーパ形状にしたり、嵌脱部１８の嵌め込まれる側の端面をラウンド形状にしたりすることにより、貫通支持部１１と嵌脱部１８とに若干の位置ずれが生じた場合にも、容易に貫通支持部１１を嵌脱部１８に嵌め込むことができる。なお、第１の実施形態の変形例に限らず、貫通支持部１１の嵌脱部１８に嵌めこむ側の端面をラウンド形状にしたり、嵌脱部１８の嵌め込まれる側の端面をテーパ形状にしたりしてもよい。   Further, the end face on the side to be fitted into the fitting / removing part 18 of the penetration support part 11 is tapered, or the end face on the side to which the fitting / removing part 18 is fitted is rounded, whereby the penetration support part 11 and the fitting / removing part are provided. Even when a slight misalignment occurs with respect to 18, the penetration support portion 11 can be easily fitted into the fitting / removing portion 18. In addition, it is not restricted to the modification of 1st Embodiment, The end surface by the side of fitting to the fitting / removal part 18 of the penetration support part 11 is made into a round shape, or the end surface of the fitting side of the fitting / removal part 18 is made into a taper shape May be.

（第２の実施形態）
図８は、本発明の第２の実施形態に係る超伝導磁石装置２の上方からの透視図であり、図９は、図８のＢ−Ｂ方向の断面図である。図１０は、図９の貫通支持部１１の周辺の拡大図（輸送時）である。 (Second Embodiment)
FIG. 8 is a perspective view from above of the superconducting magnet device 2 according to the second embodiment of the present invention, and FIG. 9 is a cross-sectional view in the BB direction of FIG. FIG. 10 is an enlarged view (at the time of transportation) of the periphery of the penetration support portion 11 of FIG.

図９と図１０に示すように、第２の実施形態に係る超伝導磁石装置２は、第１の実施形態の超伝導磁石装置２と比較して、貫通支持部１１が、常時、すなわち、輸送時でも、稼働時でも、調整時でも、第１断熱支持部１６に直接固定されている点が異なっている。また、調整ねじ１４が省かれている点が異なっている。調整ねじ１４がない場合は、前記のようにジャッキを用いればよい。   As shown in FIG. 9 and FIG. 10, the superconducting magnet device 2 according to the second embodiment has a through-supporting portion 11 that is always in comparison with the superconducting magnet device 2 of the first embodiment, that is, It is different in that it is directly fixed to the first heat insulating support 16 during transportation, operation, and adjustment. Further, the difference is that the adjusting screw 14 is omitted. If there is no adjustment screw 14, a jack may be used as described above.

貫通支持部１１が、常時、第１断熱支持部１６に固定されているので、ＭＲＩ装置１を輸送するときは、締結部１５により、貫通支持部１１と真空容器５とを締結すればよい。第２の実施形態によっても、第１の実施形態と同様に、輸送時の衝撃による熱シールド７とコイル容器８の移動を抑制し、第２断熱支持部２３、２４の変形を防止することができる。   Since the penetration support part 11 is always fixed to the first heat insulation support part 16, when the MRI apparatus 1 is transported, the penetration support part 11 and the vacuum vessel 5 may be fastened by the fastening part 15. Also in the second embodiment, similarly to the first embodiment, it is possible to suppress the movement of the heat shield 7 and the coil container 8 due to an impact during transportation and to prevent the second heat insulating support portions 23 and 24 from being deformed. it can.

図１１に示すように、ＭＲＩ装置を、輸送時から稼動時に移行させる場合は、締結ねじ１２とスペーサ１３を取り外し、複数個のコイルばねからなる除振支持部２９に置き換える。除振支持部２９は、締結部１５が、貫通支持部１１と真空容器５とを締結していないときに、真空容器５に支持され、真空容器５に伝わる振動を貫通支持部１１に伝えないように除振しながら貫通支持部１１を支持する。   As shown in FIG. 11, when the MRI apparatus is moved from the time of transportation to the time of operation, the fastening screw 12 and the spacer 13 are removed and replaced with a vibration isolation support portion 29 composed of a plurality of coil springs. The vibration isolation support portion 29 is supported by the vacuum vessel 5 when the fastening portion 15 does not fasten the penetration support portion 11 and the vacuum vessel 5, and does not transmit vibration transmitted to the vacuum vessel 5 to the penetration support portion 11. In this way, the through-supporting portion 11 is supported while removing vibration.

このように、ＭＲＩ装置が稼働しているときは、貫通支持部１１が第１断熱支持部１６に固定されているものの、締結部１５が貫通支持部１１と真空容器５とを締結しておらず、真空容器５から貫通支持部１１を、貫通支持部１１の荷重と大気圧のみを支持可能な弱いコイルばねで支持しているので、真空容器５に伝わる振動は、コイルばねが吸収し、コイル容器８や熱シールド７に伝わらないので、ＭＲＩ画像に悪影響を与えない。   Thus, when the MRI apparatus is operating, although the penetration support portion 11 is fixed to the first heat insulation support portion 16, the fastening portion 15 has fastened the penetration support portion 11 and the vacuum vessel 5. First, since the penetration support part 11 is supported by the weak coil spring that can support only the load and the atmospheric pressure of the penetration support part 11 from the vacuum vessel 5, the vibration transmitted to the vacuum vessel 5 is absorbed by the coil spring, Since it is not transmitted to the coil container 8 or the heat shield 7, the MRI image is not adversely affected.

なお、真空容器５の貫通支持部１１が貫通する開口において、真空容器５と貫通支持部１１とは接しておらず、すきま１９が開口の全周にわたり形成されている。また、除振支持部２９として、コイルばねを用いたが、これに限らず、皿ばね、板ばね、空気ばね、防振ゴムを用いることができる。   In addition, in the opening which the penetration support part 11 of the vacuum vessel 5 penetrates, the vacuum container 5 and the penetration support part 11 do not contact, but the clearance gap 19 is formed over the perimeter of the opening. Moreover, although the coil spring was used as the vibration isolation support part 29, not only this but a disc spring, a leaf | plate spring, an air spring, and a vibration-proof rubber can be used.

また、除振支持部２９は、締結部１５から置き換えることも可能であるが、締結部１５の配置されていない箇所に、稼働時だけでなく輸送時も取り付けておいてもよい。締結部１５を取り外すだけで、弱いばねコイルによる支持が可能になる。   Moreover, although the vibration isolation support part 29 can be replaced from the fastening part 15, it may be attached to a place where the fastening part 15 is not disposed not only during operation but also during transportation. Support by a weak spring coil is possible only by removing the fastening portion 15.

（第２の実施形態の変形例１）
図１２と図１３に示すように、本発明の第２の実施形態の変形例１に係る超伝導磁石装置は、第２の実施形態の超伝導磁石装置２と比較して、シール部１７のベローズが、軸シール２８になっている点が異なっている。 (Modification 1 of 2nd Embodiment)
As shown in FIGS. 12 and 13, the superconducting magnet device according to the first modification of the second embodiment of the present invention has a seal portion 17 as compared with the superconducting magnet device 2 of the second embodiment. The difference is that the bellows is a shaft seal 28.

シール部１７に軸シール２８を用いることで、真空容器５内を真空に保持したまま、貫通支持部１１を真空容器５に対して上下動させることができるだけでなく、万が一、シール部１７が損傷しても、溶接で取り付けたベローズに比べて、貫通支持部１１の軸部に巻きつけた軸シール２８であれば、迅速に交換ができ、ＭＲＩ装置の復旧までの時間短縮が望める。また、軸シール２８は、除振ゴムとして機能するだけでなく、すきま１９を確実に形成するように機能する。   By using the shaft seal 28 for the seal portion 17, the penetration support portion 11 can be moved up and down with respect to the vacuum vessel 5 while keeping the inside of the vacuum vessel 5 in a vacuum, and the seal portion 17 is damaged by any chance. Even if it is compared with the bellows attached by welding, if it is the shaft seal 28 wound around the shaft part of the penetration support part 11, replacement | exchange can be carried out rapidly and it can hope for shortening of the time until restoration of an MRI apparatus. Further, the shaft seal 28 not only functions as a vibration isolation rubber but also functions to reliably form the clearance 19.

（第２の実施形態の変形例２）
図１４に示すように、本発明の第２の実施形態の変形例２に係る超伝導磁石装置は、第２の実施形態の超伝導磁石装置２と比較して、除振支持部２９のコイルばねが、除振ゴムになっている点が異なっている。除振ゴムであれば、高さ等の微調整が容易で調整時間を短縮できる。 (Modification 2 of the second embodiment)
As shown in FIG. 14, the superconducting magnet device according to the second modification of the second embodiment of the present invention is different from the superconducting magnet device 2 of the second embodiment in the coil of the vibration isolation support portion 29. The difference is that the spring is anti-vibration rubber. If it is a vibration isolator, fine adjustment of height etc. is easy and adjustment time can be shortened.

（第２の実施形態の変形例３）
図１５に示すように、本発明の第２の実施形態の変形例３に係る超伝導磁石装置は、第２の実施形態の超伝導磁石装置２と比較して、除振支持部２９のコイルばねが、１つになっている点が異なっている。コイルばね３１は、ベローズの外径側に、ベローズと中心軸が一致するように配置されている。なお、コイルばね３１は、ベローズの外径側に限らず、ベローズの内径側に配置することも可能である。コイルばねの本数を２本以上から１本に変更しており、調整時間が短縮できる。 (Modification 3 of the second embodiment)
As shown in FIG. 15, the superconducting magnet device according to the third modification of the second embodiment of the present invention is compared with the superconducting magnet device 2 of the second embodiment. The difference is that there is only one spring. The coil spring 31 is arranged on the outer diameter side of the bellows so that the bellows and the central axis coincide. The coil spring 31 can be arranged not only on the outer diameter side of the bellows but also on the inner diameter side of the bellows. The number of coil springs is changed from two or more to one, and the adjustment time can be shortened.

本発明の第１の実施形態に係る磁気共鳴イメージング装置の斜視図である。1 is a perspective view of a magnetic resonance imaging apparatus according to a first embodiment of the present invention. 本発明の第１の実施形態に係る超伝導磁石装置の上方からの透視図である。It is a perspective view from the upper part of the superconducting magnet device concerning a 1st embodiment of the present invention. 図２のＡ−Ａ方向の断面図（輸送時）である。It is sectional drawing (at the time of transport) of the AA direction of FIG. （ａ）は、図３の貫通支持部の周辺の拡大図（輸送時）であり、（ｂ）は、第１断熱支持部の斜視図である。(A) is an enlarged view (at the time of transport) of the periphery of the penetration support part of FIG. 3, (b) is a perspective view of a 1st heat insulation support part. 図３の貫通支持部の周辺の拡大図（調整時）である。FIG. 4 is an enlarged view (at the time of adjustment) of the periphery of the through support portion of FIG. 3. 図３の貫通支持部の周辺の拡大図（稼働時）である。It is an enlarged view of the periphery of the penetration support part of FIG. 3 (at the time of operation). 本発明の第１の実施形態の変形例に係る超伝導磁石装置の貫通支持部周辺の断面図であり、図４に対応している。It is sectional drawing of the penetration support part periphery of the superconducting magnet apparatus which concerns on the modification of the 1st Embodiment of this invention, and respond | corresponds to FIG. 本発明の第２の実施形態に係る超伝導磁石装置の上方からの透視図である。It is a perspective view from the upper part of the superconducting magnet device concerning a 2nd embodiment of the present invention. 図８のＢ−Ｂ方向の断面図（輸送時）である。It is sectional drawing (at the time of transport) of the BB direction of FIG. 図９の貫通支持部の周辺の拡大図（輸送時）である。FIG. 10 is an enlarged view (at the time of transportation) of the periphery of the penetration support portion of FIG. 図９の貫通支持部の周辺の拡大図（稼働時）である。FIG. 10 is an enlarged view (at the time of operation) of the periphery of the through support portion of FIG. 9. 本発明の第２の実施形態の変形例１に係る超伝導磁石装置の貫通支持部周辺の断面図（輸送時）であり、図１０に対応している。It is sectional drawing (at the time of transport) of the penetration support part periphery of the superconducting magnet apparatus which concerns on the modification 1 of the 2nd Embodiment of this invention, and respond | corresponds to FIG. 本発明の第２の実施形態の変形例１に係る超伝導磁石装置の貫通支持部周辺の断面図（稼働時）であり、図１１に対応している。It is sectional drawing (at the time of operation | movement) surrounding a penetration support part of the superconducting magnet apparatus which concerns on the modification 1 of the 2nd Embodiment of this invention, and respond | corresponds to FIG. 本発明の第２の実施形態の変形例２に係る超伝導磁石装置の貫通支持部周辺の断面図（稼働時）であり、図１１に対応している。It is sectional drawing (at the time of operation | use) of the penetration support part periphery of the superconducting magnet apparatus which concerns on the modification 2 of the 2nd Embodiment of this invention, and respond | corresponds to FIG. 本発明の第２の実施形態の変形例３に係る超伝導磁石装置の貫通支持部周辺の断面図（稼働時）であり、図１１に対応している。It is sectional drawing (at the time of operation | movement) surrounding a penetration support part of the superconducting magnet apparatus which concerns on the modification 3 of the 2nd Embodiment of this invention, and respond | corresponds to FIG.

符号の説明Explanation of symbols

１ 磁気共鳴イメージング（ＭＲＩ）装置
２ 超伝導磁石装置
３ 制御装置
４ ベッド
５ 真空容器
５ａ 第１真空容器
５ｂ 第２真空容器
５ｃ 真空連結管
６ａ、６ｂ 超伝導コイル
７ 熱シールド
７ａ 第１熱シールド
７ｂ 第２熱シールド
７ｃ シールド連結管
７ｄ シールド支持部
８ コイル容器
８ａ 第１コイル容器
８ｂ 第２コイル容器
８ｃ コイル連結管
９ 検査領域
１１ 貫通支持部
１２、１２ａ 締結ねじ
１３、１３ａ スペーサ
１４ 調整ねじ
１５、１５ａ 締結部
１６ 第１断熱支持部
１７ ベローズ（シール部）
１８ 嵌脱部
１９ すきま
２１ａ 第１クライオスタット
２１ｂ 第２クライオスタット
２１ｃ 連結柱
２２ 冷媒
２３、２４ 第２断熱支持部
２５ 床
２６、２７ 検査部（傾斜磁場コイル、高周波照射コイル）
２８ 軸シール（シール部）
２９ 除振支持部（ばね）
３０ 除振支持部（ゴム）
３１ 除振支持部（ばね） DESCRIPTION OF SYMBOLS 1 Magnetic resonance imaging (MRI) apparatus 2 Superconducting magnet apparatus 3 Control apparatus 4 Bed 5 Vacuum container 5a 1st vacuum container 5b 2nd vacuum container 5c Vacuum connection pipe 6a, 6b Superconducting coil 7 Heat shield 7a 1st heat shield 7b 2nd heat shield 7c Shield connection pipe 7d Shield support part 8 Coil container 8a 1st coil container 8b 2nd coil container 8c Coil connection pipe 9 Inspection area 11 Penetration support part 12, 12a Fastening screw 13, 13a Spacer 14 Adjustment screw 15, 15a Fastening part 16 1st heat insulation support part 17 Bellows (seal part)
18 fitting / removal part 19 clearance 21a first cryostat 21b second cryostat 21c connecting pillar 22 refrigerant 23, 24 second heat insulation support part 25 floor 26, 27 inspection part (gradient magnetic field coil, high frequency irradiation coil)
28 Shaft seal (seal part)
29 Anti-vibration support (spring)
30 Anti-vibration support (rubber)
31 Anti-vibration support (spring)

Claims (20)

所定の電流を流して検査領域に静磁場を発生させる超伝導コイルと、
前記超伝導コイルを支持し、前記超伝導コイルを冷媒と共に収納するコイル容器と、
前記コイル容器を包囲し、内部が真空に保持された真空容器とを有する磁気共鳴イメージング装置において、
前記コイル容器を断熱支持可能な第１断熱支持部と、
前記真空容器の内側において前記第１断熱支持部に固定可能であり、前記真空容器を貫通する貫通支持部とを有し、
前記真空容器の外側において、前記貫通支持部と前記真空容器とが締結可能であり、
前記貫通支持部は、常時、前記第１断熱支持部に固定されていることを特徴とする磁気共鳴イメージング装置。 A superconducting coil that generates a static magnetic field in the examination region by flowing a predetermined current;
A coil container for supporting the superconducting coil and storing the superconducting coil together with a refrigerant;
In a magnetic resonance imaging apparatus having a vacuum container that surrounds the coil container and whose inside is maintained in a vacuum,
A first heat insulating support portion capable of supporting the coil container by heat insulation;
The inside of the vacuum vessel can be fixed to the first heat insulating support portion, and has a through support portion that penetrates the vacuum vessel,
On the outside of the vacuum vessel, the penetration support part and the vacuum vessel can be fastened,
The through support portion is always magnetic resonance imaging apparatus you characterized in that it is fixed to the first insulation support. 前記貫通支持部と前記真空容器とが締結されていないときに、前記真空容器に支持され、除振しながら前記貫通支持部を支持する除振支持部を有することを特徴とする請求項１に記載の磁気共鳴イメージング装置。 When the through supporting portion and said vacuum container has not been concluded, the is supported by the vacuum vessel, in claim 1, characterized in that it comprises a vibration damping support portion for supporting the penetrating supporting part while vibration isolation The magnetic resonance imaging apparatus described. 前記除振支持部は、ばねとゴムの少なくとも１つを有することを特徴とする請求項２に記載の磁気共鳴イメージング装置。 The magnetic resonance imaging apparatus according to claim 2 , wherein the vibration isolation support portion includes at least one of a spring and rubber. 所定の電流を流して検査領域に静磁場を発生させる超伝導コイルと、
前記超伝導コイルを支持し、前記超伝導コイルを冷媒と共に収納するコイル容器と、
前記コイル容器を包囲し、内部が真空に保持された真空容器とを有する磁気共鳴イメージング装置において、
前記コイル容器を断熱支持可能な第１断熱支持部と、
前記真空容器の内側において前記第１断熱支持部に固定可能であり、前記真空容器を貫通する貫通支持部とを有し、
前記真空容器の外側において、前記貫通支持部と前記真空容器とが締結可能であり、
前記第１断熱支持部は、一端が前記コイル容器に固定され、他端が前記貫通支持部に固定可能であるパイプまたは棒であり、前記第１断熱支持部の軸方向の延長線が互いに交わる点が、前記貫通支持部の内部に位置することを特徴とする磁気共鳴イメージング装置。 A superconducting coil that generates a static magnetic field in the examination region by flowing a predetermined current;
A coil container for supporting the superconducting coil and storing the superconducting coil together with a refrigerant;
In a magnetic resonance imaging apparatus having a vacuum container that surrounds the coil container and whose inside is maintained in a vacuum,
A first heat insulating support portion capable of supporting the coil container by heat insulation;
The inside of the vacuum vessel can be fixed to the first heat insulating support portion, and has a through support portion that penetrates the vacuum vessel,
On the outside of the vacuum vessel, the penetration support part and the vacuum vessel can be fastened,
The first heat insulating support part is a pipe or a rod having one end fixed to the coil container and the other end fixed to the penetrating support part, and the extension lines in the axial direction of the first heat insulating support part intersect each other. point is, the through support portion magnetic resonance imaging apparatus you being located inside the. 前記第１断熱支持部の軸方向が、前記コイル容器の周方向に沿うことを特徴とする請求項４に記載の磁気共鳴イメージング装置。 The magnetic resonance imaging apparatus according to claim 4 , wherein an axial direction of the first heat insulating support portion is along a circumferential direction of the coil container. 前記第１断熱支持部は、一端が前記コイル容器に固定され、他端が前記貫通支持部に固定可能であるパイプまたは棒であり、前記第１断熱支持部の軸方向の延長線が互いに交わる配置角度がほぼ９０度であることを特徴とする請求項１乃至請求項５のいずれか１項に記載の磁気共鳴イメージング装置。 The first heat insulating support part is a pipe or a rod having one end fixed to the coil container and the other end fixed to the penetrating support part, and the extension lines in the axial direction of the first heat insulating support part intersect each other. magnetic resonance imaging apparatus according to any one of claims 1 to 5 disposed angle is equal to or is approximately 90 degrees. 所定の電流を流して検査領域に静磁場を発生させる超伝導コイルと、
前記超伝導コイルを支持し、前記超伝導コイルを冷媒と共に収納するコイル容器と、
前記コイル容器を包囲し、内部が真空に保持された真空容器とを有する磁気共鳴イメージング装置において、
前記コイル容器を断熱支持可能な第１断熱支持部と、
前記真空容器の内側において前記第１断熱支持部に固定可能であり、前記真空容器を貫通する貫通支持部とを有し、
前記真空容器の外側において、前記貫通支持部と前記真空容器とが締結可能であり、
前記第１断熱支持部は、一端が前記コイル容器に固定され、他端が前記貫通支持部に固定可能であるパイプまたは棒であり、前記第１断熱支持部の軸方向の延長線が互いに交わる配置角度がほぼ９０度であることを特徴とする磁気共鳴イメージング装置。 A superconducting coil that generates a static magnetic field in the examination region by flowing a predetermined current;
A coil container for supporting the superconducting coil and storing the superconducting coil together with a refrigerant;
In a magnetic resonance imaging apparatus having a vacuum container that surrounds the coil container and whose inside is maintained in a vacuum,
A first heat insulating support portion capable of supporting the coil container by heat insulation;
The inside of the vacuum vessel can be fixed to the first heat insulating support portion, and has a through support portion that penetrates the vacuum vessel,
On the outside of the vacuum vessel, the penetration support part and the vacuum vessel can be fastened,
The first heat insulating support part is a pipe or a rod having one end fixed to the coil container and the other end fixed to the penetrating support part, and the extension lines in the axial direction of the first heat insulating support part intersect each other. magnetic resonance imaging apparatus you wherein the arrangement angle is approximately 90 degrees. 所定の電流を流して検査領域に静磁場を発生させる超伝導コイルと、
前記超伝導コイルを支持し、前記超伝導コイルを冷媒と共に収納するコイル容器と、
前記コイル容器を包囲し、内部が真空に保持された真空容器とを有する磁気共鳴イメージング装置において、
前記コイル容器を断熱支持可能な第１断熱支持部と、
前記真空容器の内側において前記第１断熱支持部に固定可能であり、前記真空容器を貫通する貫通支持部とを有し、
前記真空容器の外側において、前記貫通支持部と前記真空容器とが締結可能であり、
前記コイル容器を包囲するように設けられ、前記第１断熱支持部に断熱支持され、前記第１断熱支持部が貫通する熱シールドを有することを特徴とする磁気共鳴イメージング装置。 A superconducting coil that generates a static magnetic field in the examination region by flowing a predetermined current;
A coil container for supporting the superconducting coil and storing the superconducting coil together with a refrigerant;
In a magnetic resonance imaging apparatus having a vacuum container that surrounds the coil container and whose inside is maintained in a vacuum,
A first heat insulating support portion capable of supporting the coil container by heat insulation;
The inside of the vacuum vessel can be fixed to the first heat insulating support portion, and has a through support portion that penetrates the vacuum vessel,
On the outside of the vacuum vessel, the penetration support part and the vacuum vessel can be fastened,
The provided so as to surround the coil vessel, insulated supported by the first heat-insulating supporting part, magnetic resonance imaging apparatus further comprising a heat shield which the first heat-insulating supporting portion passes. 前記磁気共鳴イメージング装置を輪送するときは、前記貫通支持部は前記第１断熱支持部に固定され、前記貫通支持部と前記真空容器とは締結され、
前記磁気共鳴イメージング装置が稼働しているときは、前記貫通支持部が前記第１断熱支持部に固定されないか、前記貫通支持部と前記真空容器とが締結されないか、少なくともどちらか一方であることを特徴とする請求項４、請求項５、請求項７のいずれか１項に記載の磁気共鳴イメージング装置。 When transporting the magnetic resonance imaging apparatus, the penetration support part is fixed to the first heat insulation support part, and the penetration support part and the vacuum vessel are fastened,
When the magnetic resonance imaging apparatus is in operation, the penetration support part is not fixed to the first heat insulation support part, or the penetration support part and the vacuum vessel are not fastened, or at least one of them. The magnetic resonance imaging apparatus according to any one of claims 4, 5, and 7, wherein: 前記真空容器と前記貫通支持部との間をシールするシール部を有することを特徴とする請求項１乃至請求項９のいずれか１項に記載の磁気共鳴イメージング装置。 The magnetic resonance imaging apparatus according to claim 1 , further comprising a seal portion that seals between the vacuum container and the penetration support portion. 前記シール部は、ベローズと軸シールの少なくとも１つを有することを特徴とする請求項１０に記載の磁気共鳴イメージング装置。 The magnetic resonance imaging apparatus according to claim 10 , wherein the seal portion includes at least one of a bellows and a shaft seal. 前記第１断熱支持部に固定され、前記貫通支持部を嵌脱する嵌脱部を有することを特徴とする請求項９に記載の磁気共鳴イメージング装置。 10. The magnetic resonance imaging apparatus according to claim 9 , further comprising a fitting / removing part that is fixed to the first heat insulating support part and that fits and removes the penetration support part. 前記貫通支持部と前記嵌脱部との少なくともどちらか一方が、テーパ形状あるいはラウンド形状になっていることを特徴とする請求項１２に記載の磁気共鳴イメージング装置。 The magnetic resonance imaging apparatus according to claim 12 , wherein at least one of the penetrating support part and the fitting / removing part has a tapered shape or a round shape. 前記貫通支持部は、前記真空容器の上部を貫通していることを特徴とすることを特徴とする請求項１乃至請求項１３のいずれか１項に記載の磁気共鳴イメージング装置。 The through support portion, a magnetic resonance imaging apparatus according to any one of claims 1 to 13, characterized in that characterized in that through the upper portion of the vacuum vessel. 前記貫通支持部は、複数個配置されていることを特徴とする請求項１乃至請求項１４のいずれか１項に記載の磁気共鳴イメージング装置。 The through support portion, a magnetic resonance imaging apparatus according to any one of claims 1 to 14, characterized in that it is plural arranged. 前記貫通支持部の１つは、複数の前記第１断熱支持部を固定可能であることを特徴とする請求項１５に記載の磁気共鳴イメージング装置。 The magnetic resonance imaging apparatus according to claim 15 , wherein one of the penetration support portions is capable of fixing a plurality of the first heat insulation support portions. 前記真空容器と前記貫通支持部との間に配置可能なスペーサと、
前記スペーサを貫通し、前記真空容器と前記貫通支持部とを締結可能な締結ねじとを有し、
前記真空容器の外側に配置可能である締結部とを有することを特徴とする請求項１乃至請求項１６のいずれか１項に記載の磁気共鳴イメージング装置。 A spacer that can be disposed between the vacuum vessel and the penetration support;
A fastening screw that penetrates the spacer and is capable of fastening the vacuum vessel and the penetration support portion;
Magnetic resonance imaging apparatus according to any one of claims 1 to 16 and having a fastening portion can be disposed outside the vacuum container. 前記真空容器の底部に固定され、前記コイル容器を断熱支持する第２断熱支持部を有することを特徴とする請求項１乃至請求項１７のいずれか１項に記載の磁気共鳴イメージング装置。 The fixed to the bottom of the vacuum vessel, a magnetic resonance imaging apparatus according to any one of the claims 1 to 17 and having a second insulation support portion of the coil container to thermal insulating support. 前記超伝導コイルは、上下に対向配置され、それぞれの中心軸が一致し、対をなす第１超伝導コイルと第２超伝導コイルとを有し、
前記コイル容器は、
前記第１超伝導コイルを内包する第１コイル容器と、
前記第２超伝導コイルを内包し、前記第１コイル容器から下方に離れた第２コイル容器と、
前記第１コイル容器と前記第２コイル容器とを連結し、前記第１コイル容器を支持し、前記第２コイル容器に支持されるコイル連結管とを有し、
前記真空容器は、
前記第１コイル容器と前記第１断熱支持部とを内包する第１真空容器と、
前記第２コイル容器を内包し、前記第１真空容器から下方に離れた第２真空容器と、
前記第１真空容器と前記第２真空容器とを連結し、前記第１真空容器を支持し、前記第２真空容器に支持され、前記コイル連結管を内包する真空連結管とを有し、
前記検査領域９は、前記第１真空容器と前記第２真空容器と前記真空連結管との間に設けられ、
前記貫通支持部は、前記第１真空容器を貫通し、
前記第１断熱支持部は、前記第１コイル容器の上部に固定され、
前記第２断熱支持部は、前記第２真空容器の底部に固定され、前記第２コイル容器を支持することを特徴とする請求項１８に記載の磁気共鳴イメージング装置。 The superconducting coil has a first superconducting coil and a second superconducting coil, which are opposed to each other in the vertical direction, and whose center axes coincide with each other to form a pair,
The coil container
A first coil container containing the first superconducting coil;
A second coil container enclosing the second superconducting coil and spaced downward from the first coil container;
Connecting the first coil container and the second coil container, supporting the first coil container, and having a coil connection tube supported by the second coil container;
The vacuum vessel is
A first vacuum container containing the first coil container and the first heat insulating support;
A second vacuum container containing the second coil container and spaced downward from the first vacuum container;
Connecting the first vacuum container and the second vacuum container, supporting the first vacuum container, supported by the second vacuum container, and having a vacuum connection pipe containing the coil connection pipe;
The inspection region 9 is provided between the first vacuum vessel, the second vacuum vessel, and the vacuum connection tube,
The penetration support part penetrates the first vacuum vessel,
The first heat insulation support part is fixed to an upper part of the first coil container,
The magnetic resonance imaging apparatus according to claim 18 , wherein the second heat insulating support part is fixed to a bottom part of the second vacuum container and supports the second coil container. 前記真空容器と前記貫通支持部との間隔を調整可能な調整ねじを有することを特徴とする請求項１乃至請求項１９のいずれか１項に記載の磁気共鳴イメージング装置。   20. The magnetic resonance imaging apparatus according to claim 1, further comprising an adjustment screw capable of adjusting an interval between the vacuum vessel and the penetration support portion.
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