JPH07289530A - Living body magnetism measuring instrument - Google Patents
Living body magnetism measuring instrumentInfo
- Publication number
- JPH07289530A JPH07289530A JP6114351A JP11435194A JPH07289530A JP H07289530 A JPH07289530 A JP H07289530A JP 6114351 A JP6114351 A JP 6114351A JP 11435194 A JP11435194 A JP 11435194A JP H07289530 A JPH07289530 A JP H07289530A
- Authority
- JP
- Japan
- Prior art keywords
- bed
- magnetic
- measuring instrument
- magnetic shield
- tubular body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005389 magnetism Effects 0.000 title abstract description 14
- 230000005291 magnetic effect Effects 0.000 claims description 76
- 239000002887 superconductor Substances 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 12
- 239000000523 sample Substances 0.000 abstract description 13
- 239000000463 material Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 241000238366 Cephalopoda Species 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 210000005036 nerve Anatomy 0.000 description 3
- 229910004247 CaCu Inorganic materials 0.000 description 2
- 101100004297 Caenorhabditis elegans bet-1 gene Proteins 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 210000004556 brain Anatomy 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Measuring Magnetic Variables (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、磁気が適正に計測さ
れ、小型で廉価な生体磁気計測装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact and inexpensive biomagnetism measuring device in which magnetism is properly measured.
【０００２】[0002]
【従来の技術】人間等生体の脳や心臓から発する生体磁
気は、非常に微弱な為、強磁性体で囲んだ磁気シールド
ルーム内で、 SQUID素子を利用した高感度の磁気計測器
を用いて計測される。生体磁気を計測する主な目的は、
磁気を発する神経の位置を同定することにある。従っ
て、磁気シールドルーム内には被験者の他に計測技師も
入り、被験者に対し磁気計測器のプローブ等が正確にセ
ットされる。2. Description of the Related Art Since the biomagnetism emitted from the brain and heart of a living body such as a human being is extremely weak, a high-sensitivity magnetic measuring instrument using a SQUID element is used in a magnetically shielded room surrounded by a ferromagnetic material. To be measured. The main purpose of measuring biomagnetism is
It is to identify the location of the nerve that emits magnetism. Therefore, in addition to the subject, a measurement technician also enters the magnetic shield room, and the probe of the magnetic measuring instrument or the like is accurately set for the subject.
【０００３】近年、液体窒素温度で超電導体となる酸化
物超電導体が見い出された。そして本発明者等は、この
酸化物超電導体の優れた磁気シールド性を利用した磁気
シールド装置を開発した。この磁気シールド装置は、酸
化物超電導体となる原料粉末を筒状体に塗布し、これを
焼成して作製した磁気シールド筒状体からなるものであ
る。そしてこの磁気シールド筒状体を図６に示すよう
に、被験者４が１人ベット１に横たわって入る小型なも
のとすれば、製造に用いる焼成用加熱炉の設備費等を節
減できる。このような磁気シールド筒状体３を用いた生
体磁気計測装置としては、磁束計（磁気計測器）２を磁
気シールド筒状体３内に配置し、被験者４自らが、その
プローブ（図示せず）を適切な位置、方向にセットする
ものが考えられる。In recent years, oxide superconductors have been found which become superconductors at liquid nitrogen temperature. Then, the present inventors have developed a magnetic shield device utilizing the excellent magnetic shield property of the oxide superconductor. This magnetic shield device is composed of a magnetic shield tubular body produced by applying a raw material powder to be an oxide superconductor to a tubular body and firing this. As shown in FIG. 6, if the subject 4 has a small size in which one subject 4 lays on the bed 1 as shown in FIG. 6, the facility cost of the firing heating furnace used for manufacturing can be reduced. As a biomagnetism measuring apparatus using such a magnetic shield tubular body 3, a magnetometer (magnetic measuring device) 2 is arranged in the magnetic shield tubular body 3, and the subject 4 himself / herself uses its probe (not shown). ) May be set at an appropriate position and direction.
【０００４】[0004]
【発明が解決しようとする課題】被験者は磁気計測器の
プローブをセットする等の操作に慣れていない為、正確
なセットが行えず、又計測技師はこれを修正できないと
いう問題があった。Since the subject is not accustomed to operations such as setting the probe of the magnetic measuring instrument, accurate setting cannot be performed, and the measurement engineer cannot correct this.
【０００５】[0005]
【課題を解決する為の手段】本発明は、このような中で
鋭意研究を行いなされたもので、その目的とするところ
は、計測技師が磁気計測器のプローブ等を被験者に対し
て正確にセットでき、しかも小型で廉価な生体磁気計測
装置を提供することにある。即ち、本発明は、磁気シー
ルド筒状体と、生体を載せるベットと、生体磁気を計測
する磁気計測器からなる生体磁気計測装置において、ベ
ットに磁気計測器が取付けられ、ベットが磁気シールド
筒状体に対し出入自在なことを特徴とするものである。The present invention has been made through intensive studies in such a situation. The purpose of the present invention is to allow a measurement engineer to accurately attach a probe of a magnetic measuring instrument to a subject. An object of the present invention is to provide a compact and inexpensive biomagnetism measuring device that can be set. That is, the present invention relates to a biomagnetic measuring device comprising a magnetic shield tubular body, a bed on which a living body is placed, and a magnetic measuring instrument for measuring biomagnetism, wherein the magnetic measuring instrument is attached to the bed, and the bed is a magnetic shield tubular shape. It is characterized by being able to move in and out of the body.
【０００６】本発明装置では、磁気計測器が取付けられ
たベットを磁気シールド筒状体から出して計測技師が磁
気計測器のプローブを被験者にセットする。セット後ベ
ットを磁気シールド筒状体内に入れ所定位置に配置す
る。磁気シールド筒状体に対するベットの出し入れは、
例えば、ベット又は筒状体をレールに乗せ電動させて行
う。磁気計測器には SQUID素子を利用した磁束計や磁気
勾配計等が用いられる。ベットには、磁気計測器の他に
被験者を刺激する映像設備を取付けることができる。映
像設備も計測技師がセットする。映像設備としては、光
ファイババンドルによる表示設備、ビデオプロジェクタ
ーとスクリーンを組合わせた設備、これに光学レンズ系
やミラー系等を付加した設備等、磁気シールド筒状体の
外部側装置から内部側装置への信号伝達を光信号を用い
て行うものが好ましい。このような映像設備によれば、
磁気シールド筒状体内への磁束の侵入を低減できる。In the apparatus of the present invention, the bed on which the magnetic measuring instrument is attached is taken out from the magnetic shield tubular body, and the measuring engineer sets the probe of the magnetic measuring instrument on the subject. After setting, the bed is put in the cylindrical body of the magnetic shield and placed at a predetermined position. Bet in and out of the magnetic shield tubular body,
For example, a bed or a tubular body is placed on a rail and electrically operated. A magnetometer that uses a SQUID element such as a magnetometer or a magnetic gradiometer is used. In addition to the magnetic measuring device, the bed can be equipped with a video equipment that stimulates the subject. The visual engineer also sets the video equipment. Video equipment includes display equipment using optical fiber bundles, equipment that combines a video projector and a screen, equipment that adds optical lens system and mirror system, etc. It is preferable that the signal transmission to the optical fiber is performed using an optical signal. According to such video equipment,
It is possible to reduce the penetration of magnetic flux into the magnetic shield tubular body.
【０００７】本発明において、磁気シールド筒状体の構
成材料には、ＹＢａ2 Ｃｕ3 Ｏy 組成又はＢａ2 Ｓｒ2
ＣａＣｕ2 Ｏy 組成等の酸化物超電導体を始め、ＮｂＴ
ｉ等の金属超電導体、Ｎｂ3 Ｓｎ等の化合物超電導体、
強磁性金属材料等の磁気シールド性を有する任意の材料
が適用される。中でも、超電導体は磁気シールド性に優
れ、特に、酸化物超電導体は、液体窒素を冷却媒体とす
るのでランニングコストが安く好ましい。酸化物超電導
体の磁気シールド筒状体は、小型な程、材料費のみなら
ず、焼成用加熱炉の設備費と電気代が安くなる。本発明
装置では、シールド材に強磁性金属材料を用いた場合も
材料費等が大幅に節減される。In the present invention, the constituent material of the cylindrical body of the magnetic shield is YBa 2 Cu 3 Oy composition or Ba 2 Sr 2
Starting with oxide superconductors such as CaCu 2 Oy composition, NbT
metal superconductors such as i, compound superconductors such as Nb 3 Sn,
Any material having a magnetic shield property such as a ferromagnetic metal material is applied. Among them, the superconductor is excellent in magnetic shielding property, and in particular, the oxide superconductor uses liquid nitrogen as a cooling medium, so that the running cost is low and preferable. The smaller the magnetic shield tubular body of an oxide superconductor, the smaller the material cost, the lower the equipment cost of the heating furnace for firing and the electricity cost. In the device of the present invention, the material cost and the like are significantly reduced even when a ferromagnetic metal material is used as the shield material.
【０００８】[0008]
【作用】本発明の生体磁気計測装置は、被験者を乗せる
ベットに、磁気計測器、又は磁気計測器と映像設備が取
付けられ、ベットが磁気シールド筒状体に対し出入自在
である。従ってベットを磁気シールド筒状体の外に出し
て、計測技師がベット上の被験者に対して磁気計測器の
プローブや映像設備を正確にセットできる。又磁気シー
ルド筒状体は被験者１人が入れれば良いので小型化でき
る。In the biomagnetism measuring apparatus of the present invention, a magnetic measuring instrument, or a magnetic measuring instrument and video equipment are attached to a bed on which a subject is placed, and the bed can be freely moved in and out of the magnetic shield tubular body. Therefore, the bed can be taken out of the cylindrical body of the magnetic shield, and the measurement engineer can accurately set the probe of the magnetic measuring instrument and the imaging equipment to the subject on the bed. Further, the magnetic shield tubular body can be downsized because it can be accommodated by one subject.
【０００９】[0009]
【実施例】以下に本発明を実施例により詳細に説明す
る。 （実施例１）図１は本発明装置の第１の実施例を示す側
面説明図である。図で１は被験者を載せるベット、２は
前記ベット１に取付けられた SQUID素子利用の磁束計、
３は一端のみ開放した磁気シールド筒状体である。前記
ベット１は前記磁気シールド筒状体３内に連続するレー
ル８上に載置されていて、磁気シールド筒状体３に対し
出入自在に構成されている。磁気シールド筒状体３は、
エポキシ樹脂等の樹脂で作製した内筒９とＢａ2 Ｓｒ2
ＣａＣｕ2 Ｏy 組成の酸化物超電導体により作製した外
筒10を主体に構成されている。酸化物超電導体原料粉の
成形体は、内径1.5ｍφの小型加熱炉を用いて焼成し
た。EXAMPLES The present invention will be described in detail below with reference to examples. (Embodiment 1) FIG. 1 is a side view showing a first embodiment of the device of the present invention. In the figure, 1 is a bed on which a subject is placed, 2 is a magnetometer using the SQUID element attached to the bed 1,
Reference numeral 3 is a magnetic shield tubular body whose one end is open. The bed 1 is placed on a rail 8 that is continuous in the magnetic shield tubular body 3, and is configured to be able to move in and out of the magnetic shield tubular body 3. The magnetic shield tubular body 3 is
Inner cylinder 9 made of resin such as epoxy resin and Ba 2 Sr 2
The outer cylinder 10 is mainly composed of an oxide superconductor of CaCu 2 Oy composition. The compact of the oxide superconductor raw material powder was fired using a small heating furnace having an inner diameter of 1.5 mφ.
【００１０】この装置による生体磁気計測は以下のよう
にして行う。先ず、ベット１を磁気シールド筒状体３の
外に出し、計測技師（図示せず）が、ベット１上の被験
者４に対して、ベット１に取付けた磁束計２のプローブ
を正確にセットする。セット後、ベット１を、レール８
上を電動させて磁気シールド筒状体３内に入れ、被験者
４からの発生磁気を計測する。磁気シールド筒状体３内
では、ベット１は内筒９により支持される。The biomagnetism measurement by this device is performed as follows. First, the bed 1 is taken out of the magnetic shield tubular body 3, and a measurement engineer (not shown) accurately sets the probe of the magnetometer 2 attached to the bed 1 to the subject 4 on the bed 1. . After setting, bet 1 and rail 8
The upper part is electrically driven and put in the magnetic shield tubular body 3, and the generated magnetism from the subject 4 is measured. In the magnetic shield tubular body 3, the bed 1 is supported by the inner tube 9.
【００１１】（実施例２）図２は本発明装置の第２の実
施例を示す説明図である。ベット１上に磁束計２と映像
設備５が取付けられ、計測技師が被験者４に磁束計２の
プローブと映像設備５をセットし、被験者４を映像によ
り刺激した他は、実施例１と同じ方法により、被験者４
からの発生磁気を計測した。映像設備５には、ビデオプ
ロジェクター６とスクリーン７を組合わせたものを用い
た。(Embodiment 2) FIG. 2 is an explanatory view showing a second embodiment of the device of the present invention. The same method as in Example 1 except that the magnetometer 2 and the image equipment 5 were mounted on the bed 1, and the measurement engineer set the probe of the magnetometer 2 and the image equipment 5 on the subject 4 and stimulated the subject 4 with an image. Subject 4
The magnetism generated from the was measured. As the image equipment 5, a combination of a video projector 6 and a screen 7 was used.
【００１２】前記実施例１及び実施例２では、計測技師
が磁束計のプローブ、又は磁束計のプローブと映像設備
を被験者に正確にセットできた為、被験者の神経位置を
適正に同定できた。比較の為、図６に示す従来の磁気計
測装置を用いて、同じ被験者について発生磁気を計測し
た。磁気の検出レベルが低く、神経位置を適正に同定で
きなかった。これは、被験者４が、磁束計２のプローブ
を正確にセットできなかった為である。In the first and second embodiments, the measurement engineer was able to correctly set the probe of the magnetometer, or the probe of the magnetometer and the imaging equipment, so that the nerve position of the subject could be properly identified. For comparison, the generated magnetism was measured for the same subject using the conventional magnetic measurement device shown in FIG. The magnetic detection level was too low to properly identify the nerve position. This is because the subject 4 could not accurately set the probe of the magnetometer 2.
【００１３】（実施例３）図３は本発明装置の第３の実
施例を示す説明図である。この磁気計測装置は、図１に
示す磁気計測装置のベット１上に、開口シール部材11
を、取外し可能に配置したものである。開口シール部材
11としては、パーマロイ等の強磁性材料製の円筒を同心
円状に３つ重なるように設けたもの等が用いられる。こ
の磁気計測装置では、レール８上を走行させてベット１
を磁気シールド筒状体３内に入れ、ベット１が計測位置
に達したときに、開口シール部材11は磁気シールド筒状
体３の開口部に位置する。これにより磁気シールド筒条
体３内への磁束の侵入が低減される。この磁気計測装置
では、ベット１上に開口シール部材11を設けたので、ベ
ット１による被験者４の出入りと開口シール部材11によ
る磁気シールド特性の向上とを両立させることができ
る。(Embodiment 3) FIG. 3 is an explanatory view showing a third embodiment of the device of the present invention. This magnetic measuring device has an opening seal member 11 on the bed 1 of the magnetic measuring device shown in FIG.
Is arranged so as to be removable. Opening seal member
As 11, there may be used one in which three cylinders made of a ferromagnetic material such as permalloy are concentrically provided so as to overlap each other. In this magnetic measuring device, the bet 1 is run by running on the rail 8.
Is placed in the magnetic shield tubular body 3, and when the bed 1 reaches the measurement position, the opening seal member 11 is positioned at the opening of the magnetic shield tubular body 3. This reduces the penetration of magnetic flux into the magnetic shield tubular body 3. In this magnetic measuring device, since the opening seal member 11 is provided on the bed 1, the entrance and exit of the subject 4 by the bed 1 and the improvement of the magnetic shield characteristics by the opening seal member 11 can both be achieved.
【００１４】（実施例４）図４は本発明装置の第４の実
施例を示す説明図である。この磁気計測装置は、図３に
示す磁気計測装置の磁気シールド筒状体３に両端開放の
磁気シールド筒状体13を用い、前記筒状体13の先端側に
開口シール部材21を配置して、両端開放の磁気シールド
装置13の先端側を磁気シールドした他は、図３に示す磁
気計測装置と同じである。(Embodiment 4) FIG. 4 is an explanatory view showing a fourth embodiment of the device of the present invention. This magnetic measuring device uses a magnetic shield tubular body 13 with both ends open to the magnetic shield tubular body 3 of the magnetic measuring device shown in FIG. 3, and an opening seal member 21 is arranged at the tip side of the tubular body 13. The magnetic measuring device is the same as the magnetic measuring device shown in FIG. 3 except that the front end side of the magnetic shield device 13 whose both ends are opened is magnetically shielded.
【００１５】（実施例５）図５は本発明装置の第５の実
施例を示す説明図である。この磁気計測装置は、図４に
示す磁気計測装置の開口シール部材21をベット１上に配
置した他は、図４に示す磁気計測装置と同じである。(Embodiment 5) FIG. 5 is an explanatory view showing a fifth embodiment of the device of the present invention. This magnetic measuring device is the same as the magnetic measuring device shown in FIG. 4 except that the opening seal member 21 of the magnetic measuring device shown in FIG. 4 is arranged on the bed 1.
【００１６】前記実施例４と実施例５に記載した磁気計
測装置では、頭部側外方から、採光でき又機器の微調整
が可能等の効果が加わる。In the magnetic measuring devices described in the fourth and fifth embodiments, the effect that the light can be taken from the outside of the head side and the device can be finely adjusted is added.
【００１７】[0017]
【効果】以上述べたように、本発明の生体磁気計測装置
は、ベットに磁気計測器等が取付けられ、又ベットが磁
気シールド筒状体に対し出入自在である。従って、ベッ
トを磁気シールド筒状体の外に出し、熟練した計測技師
が、ベット上の被験者に磁気計測器のプローブ等を正確
にセットでき、被験者からの発生磁気を適正に計測でき
る。又磁気シールド筒状体は被験者１人が入れる小型の
もので良く経費が節減される。As described above, in the biomagnetism measuring device of the present invention, a magnetic measuring instrument or the like is attached to the bed, and the bed can be inserted into and removed from the magnetic shield tubular body. Therefore, the bet can be taken out of the magnetic shield tubular body, and a skilled measurement engineer can accurately set the probe of the magnetic measuring instrument or the like on the subject on the bed, and the generated magnetism from the subject can be properly measured. Further, the magnetic shield tubular body is small in size and can be saved by one subject, and the cost can be saved.
【図１】本発明の生体磁気計測装置の第１の実施例を示
す側面説明図である。FIG. 1 is a side view showing a first embodiment of a biomagnetism measuring device of the present invention.
【図２】本発明の生体磁気計測装置の第２の実施例を示
す側面説明図である。FIG. 2 is a side view showing a second embodiment of the biomagnetism measuring device of the present invention.
【図３】本発明の生体磁気計測装置の第３の実施例を示
す側面説明図である。FIG. 3 is a side view showing a third embodiment of the biomagnetism measuring device of the present invention.
【図４】本発明の生体磁気計測装置の第４の実施例を示
す側面説明図である。FIG. 4 is a side view showing a fourth embodiment of the biomagnetism measuring device of the present invention.
【図５】本発明の生体磁気計測装置の第５の実施例を示
す側面説明図である。FIG. 5 is a side view showing a fifth embodiment of the biomagnetism measuring device of the present invention.
【図６】従来の生体磁気計測装置の側面説明図である。FIG. 6 is a side view of a conventional biomagnetism measuring device.
１───ベット ２───磁束計 ３,13 ─磁気シールド筒状体 ４───被験者 ５───映像設備 ６───ビデオプロジェクター ７───スクリーン ８───レール ９───エポキシ樹脂製内筒 10───酸化物超電導体製外筒 11,21 ─開口シール部材 1 ───Bet 2 ───Magnetometer 3,13 ─Magnetic shield cylinder 4 ─── Subject 5 ─── Video equipment 6 ─── Video projector 7 ─── Screen 8 ─── Rail 9 ── ─Epoxy resin inner cylinder 10 ───Oxide superconductor outer cylinder 11,21 ─Opening seal member
Claims (3)
ットと、生体磁気を計測する磁気計測器からなる生体磁
気計測装置において、ベットに磁気計測器が取付けら
れ、ベットが磁気シールド筒状体に対し出入自在なこと
を特徴とする生体磁気計測装置。1. A biomagnetism measuring device comprising a magnetic shield tubular body, a bed on which a living body is placed, and a magnetic measuring instrument for measuring biomagnetism, wherein the magnetic measuring instrument is attached to the bed, and the bed is the magnetic shield tubular body. A biomagnetic measurement device that can be freely moved in and out of.
られていることを特徴とする請求項１記載の生体磁気計
測装置。2. The biomagnetism measuring device according to claim 1, wherein a magnetic measuring device and a video equipment are attached to the bed.
ら形成されていることを特徴とする請求項１又は請求項
２記載の生体磁気計測装置。3. The biomagnetism measuring device according to claim 1, wherein the magnetic shield tubular body is formed of an oxide superconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6114351A JPH07289530A (en) | 1994-04-27 | 1994-04-27 | Living body magnetism measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6114351A JPH07289530A (en) | 1994-04-27 | 1994-04-27 | Living body magnetism measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07289530A true JPH07289530A (en) | 1995-11-07 |
Family
ID=14635577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6114351A Pending JPH07289530A (en) | 1994-04-27 | 1994-04-27 | Living body magnetism measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07289530A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7432705B2 (en) | 2002-11-29 | 2008-10-07 | Hitachi, Ltd. | Magnetic shields and instruments for measuring biomagnetic fields |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05317280A (en) * | 1992-05-25 | 1993-12-03 | Rikagaku Kenkyusho | Brain magnetic field measurement device |
-
1994
- 1994-04-27 JP JP6114351A patent/JPH07289530A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05317280A (en) * | 1992-05-25 | 1993-12-03 | Rikagaku Kenkyusho | Brain magnetic field measurement device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7432705B2 (en) | 2002-11-29 | 2008-10-07 | Hitachi, Ltd. | Magnetic shields and instruments for measuring biomagnetic fields |
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