JP5693952B2 - 安全モードを有するアンテナシステム - Google Patents
安全モードを有するアンテナシステム Download PDFInfo
- Publication number
- JP5693952B2 JP5693952B2 JP2010504936A JP2010504936A JP5693952B2 JP 5693952 B2 JP5693952 B2 JP 5693952B2 JP 2010504936 A JP2010504936 A JP 2010504936A JP 2010504936 A JP2010504936 A JP 2010504936A JP 5693952 B2 JP5693952 B2 JP 5693952B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- antenna system
- magnetic field
- voltage
- mode
- 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.)
- Active
Links
- 239000013598 vector Substances 0.000 claims description 24
- 239000007943 implant Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 12
- 230000002441 reversible effect Effects 0.000 claims description 5
- 230000000747 cardiac effect Effects 0.000 claims description 4
- 239000003814 drug Substances 0.000 claims description 2
- 229940079593 drug Drugs 0.000 claims description 2
- 230000001939 inductive effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 1
- 230000004907 flux Effects 0.000 description 10
- 238000002595 magnetic resonance imaging Methods 0.000 description 9
- 230000008859 change Effects 0.000 description 7
- 238000003384 imaging method Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- UELITFHSCLAHKR-UHFFFAOYSA-N acibenzolar-S-methyl Chemical compound CSC(=O)C1=CC=CC2=C1SN=N2 UELITFHSCLAHKR-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 235000001968 nicotinic acid Nutrition 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 210000000278 spinal cord Anatomy 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/285—Invasive instruments, e.g. catheters or biopsy needles, specially adapted for tracking, guiding or visualization by NMR
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/288—Provisions within MR facilities for enhancing safety during MR, e.g. reduction of the specific absorption rate [SAR], detection of ferromagnetic objects in the scanner room
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Prostheses (AREA)
- Electrotherapy Devices (AREA)
Description
V=−NdΦ/dt(1)
に等しく、ここで、Φ=B・Aは、磁束表面Aのコイルを通る磁束であり、Bが磁場又は磁場密度である。したがって、可変磁場をインダクタコイルに結合することで、アンテナ端において電圧を生成し得、インプラントに電力を送ることができる。
Claims (10)
- 2つの出力端子を持つインプラント可能装置用のアンテナシステムであって、
a)各々が2つの端子を有する少なくとも2つの異なるコイルユニットと、
b)前記コイルユニットが、前記出力端子にて第1の電圧を生成するよう、所与の磁場によって誘導される電圧に関して直列に接続される「動作モード」、及び前記コイルユニットが、前記出力端子にて第1の電圧より低い第2の電圧を生成するよう、前記誘導された電圧に関して逆直列に接続される「安全モード」の間で選択的に切り替わる制御回路とを有し、
前記制御回路が、外部の磁場によって生じるいくつかの影響を検出するセンサユニットを含み、
前記制御回路が、前記センサユニットが外部磁場であって前記外部磁場の特性パラメータのうちの少なくとも1つが所与の閾値を越える外部磁場を検出する場合に、安全モード切り替えるためのサブ回路を含む、インプラント可能装置用のアンテナシステム。 - 前記コイルユニットが、平行及び/又は等しい大きさのコイルエリアベクトルによって特徴づけられる、請求項1に記載のアンテナシステム。
- 前記制御回路が外部コマンドを受ける受信機を含むことを特徴とする、請求項1に記載のアンテナシステム。
- 前記制御回路が、動作モードが開始してから所定の時間後に前記安全モードに戻ることを誘発するタイマを有することを特徴とする、請求項1に記載のアンテナシステム。
- 外部装置による無線識別を可能にする識別子モジュールを含むことを特徴とする、請求項1に記載のアンテナシステム。
- 請求項1に記載の少なくとも2つのアンテナシステムを含み、各アンテナシステムの前記コイルユニットは、平行コイルエリアベクトルを有し、異なるアンテナシステムの前記コイルエリアベクトルが非平行である、インプラント可能装置のためのアンテナ構成。
- 請求項1に記載のアンテナシステムを有する、心臓ペースメーカ、神経刺激器、薬ポンプ又は蝸牛インプラントを含む、インプラント可能装置。
- 請求項1に記載のアンテナシステムを安全モード及び/又は動作モードにするようにワイヤレスで命令するコマンドモジュールを有する、モード選択装置。
- 請求項8に記載のモード選択装置を有する、MRI装置。
- 2つの出力端子と少なくとも2つの異なるコイルユニットとを有する、インプラント可能装置のアンテナシステムを制御する方法であって、前記出力端子にて第1の電圧を生成するよう、前記コイルユニットが所与の磁場によって誘動される電圧に関して直列に接続される「動作モード」と、前記出力端子にて第1の電圧より低い第2の電圧を生成するよう、前記コイルユニットが前記誘導された電圧に関して逆直列に接続される「安全モード」との間で選択的に切り替えるステップを含み、
前記「安全モード」への切り替えが、外部磁場であって、前記外部磁場の特性パラメータのうちの少なくとも1つが所与の閾値を越える外部磁場を検出する場合に行われる、方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07107139 | 2007-04-27 | ||
EP07107139.3 | 2007-04-27 | ||
PCT/IB2008/051525 WO2008132653A1 (en) | 2007-04-27 | 2008-04-21 | Antenna system with safety mode |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2010524621A JP2010524621A (ja) | 2010-07-22 |
JP5693952B2 true JP5693952B2 (ja) | 2015-04-01 |
Family
ID=39596813
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2010504936A Active JP5693952B2 (ja) | 2007-04-27 | 2008-04-21 | 安全モードを有するアンテナシステム |
Country Status (5)
Country | Link |
---|---|
US (1) | US8489198B2 (ja) |
EP (1) | EP2151009B1 (ja) |
JP (1) | JP5693952B2 (ja) |
CN (1) | CN101669250B (ja) |
WO (1) | WO2008132653A1 (ja) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2467728B1 (en) * | 2009-08-20 | 2015-10-14 | MED-EL Elektromedizinische Geräte GmbH | Mri-safe implant electronics |
US8810245B2 (en) * | 2011-02-10 | 2014-08-19 | Biotronik Se & Co. Kg | Device for generating opposing fields and method for operating a magnetic resonance scanner |
US9795792B2 (en) | 2011-02-25 | 2017-10-24 | Medtronic, Inc. | Emergency mode switching for non-pacing modes |
US8772976B2 (en) * | 2011-03-30 | 2014-07-08 | Intel Corporation | Reconfigurable coil techniques |
KR101465001B1 (ko) * | 2014-01-10 | 2014-11-26 | 경북대학교 산학협력단 | 이식형 기기 및 무선 전송 장치 |
US10491026B2 (en) | 2016-03-31 | 2019-11-26 | Intel Corporation | Impedance matching multiple coils in an electronic device |
DE102016206398A1 (de) * | 2016-04-15 | 2017-10-19 | Siemens Healthcare Gmbh | Betrieb einer Magnetresonanzvorrichtung unter Berücksichtigung von Implantat-Trägern |
US10658745B2 (en) | 2017-09-07 | 2020-05-19 | Cochlear Limited | Implantable medical device with multi-band loop antenna |
EP3543717A1 (de) * | 2018-03-22 | 2019-09-25 | Narda Safety Test Solutions GmbH | Personenschutz-messgerät |
FR3083859B1 (fr) * | 2018-07-12 | 2020-06-12 | Continental Automotive France | Capteur a emission radioelectrique pour roue de vehicule, comportant un circuit d'antenne a deux modes |
CA3120296A1 (en) * | 2019-01-04 | 2020-07-09 | Michel M. Maharbiz | Ultrasound-based protocol for operating an implantable device |
US11955729B2 (en) * | 2022-03-25 | 2024-04-09 | Nxp B.V. | Antenna system and method for operating an antenna |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4614192A (en) * | 1982-04-21 | 1986-09-30 | Mieczyslaw Mirowski | Implantable cardiac defibrillator employing bipolar sensing and telemetry means |
JPH0363782A (ja) * | 1989-08-01 | 1991-03-19 | Canon Inc | Icカードの保護装置 |
JPH0515509A (ja) * | 1991-07-10 | 1993-01-26 | Toshiba Corp | Mri用プローブ装置 |
US5278505A (en) | 1991-12-17 | 1994-01-11 | The Regents Of The University Of California | Self-cancelling RF receive coil used to decouple MRI transmit/receive RF coils |
JPH0670906A (ja) * | 1992-06-29 | 1994-03-15 | Olympus Optical Co Ltd | Mr観測用アンテナ装置 |
JPH08167014A (ja) * | 1994-12-12 | 1996-06-25 | Omron Corp | 無線icカードおよびそれを用いた料金収受システム並びに無線icカードにおける電源制御方法 |
JP3490173B2 (ja) * | 1995-03-08 | 2004-01-26 | ジーイー横河メディカルシステム株式会社 | 高周波信号処理方法および高周波信号処理装置並びに磁気共鳴撮影装置 |
SE511501C2 (sv) * | 1997-07-09 | 1999-10-11 | Allgon Ab | Kompakt antennanordning |
DE19746735C2 (de) * | 1997-10-13 | 2003-11-06 | Simag Gmbh Systeme Und Instr F | NMR-Bildgebungsverfahren zur Darstellung, Positionsbestimmung oder funktionellen Kontrolle einer in ein Untersuchungsobjekt eingeführten Vorrichtung und Vorrichtung zur Verwendung in einem derartigen Verfahren |
US6348070B1 (en) | 1998-04-17 | 2002-02-19 | Med-El Elektromedizinische Gerate Ges.M.B.H | Magnetic-interference-free surgical prostheses |
JP3975583B2 (ja) * | 1998-10-15 | 2007-09-12 | 株式会社デンソー | Idタグ用手持式リーダライタ |
US6229443B1 (en) | 2000-06-23 | 2001-05-08 | Single Chip Systems | Apparatus and method for detuning of RFID tag to regulate voltage |
CA2411782A1 (en) * | 2000-06-30 | 2002-01-17 | Cochlear Limited | Cochlear implant |
US6949929B2 (en) | 2003-06-24 | 2005-09-27 | Biophan Technologies, Inc. | Magnetic resonance imaging interference immune device |
US6961604B1 (en) * | 2001-10-09 | 2005-11-01 | Koninklijke Philips Electroncis N.V. | Wireless controller and application interface for an MRI system |
EP1490148A2 (en) | 2002-04-01 | 2004-12-29 | Med-El Elektromedizinische Geräte GmbH | Reducing effect of magnetic and electromagnetic fields on an implants magnet and/or electronic |
JP4078238B2 (ja) | 2003-04-08 | 2008-04-23 | 吉川アールエフシステム株式会社 | アンテナ装置 |
US7242981B2 (en) | 2003-06-30 | 2007-07-10 | Codman Neuro Sciences Sárl | System and method for controlling an implantable medical device subject to magnetic field or radio frequency exposure |
CN100373694C (zh) * | 2004-02-23 | 2008-03-05 | 启碁科技股份有限公司 | 可调整的无线通讯装置及其控制方法 |
JP2006324651A (ja) * | 2005-04-20 | 2006-11-30 | Matsushita Electric Ind Co Ltd | シールド方法、シールド装置、電気電子機器 |
-
2008
- 2008-04-21 JP JP2010504936A patent/JP5693952B2/ja active Active
- 2008-04-21 CN CN200880013811.8A patent/CN101669250B/zh active Active
- 2008-04-21 EP EP08737933.5A patent/EP2151009B1/en active Active
- 2008-04-21 WO PCT/IB2008/051525 patent/WO2008132653A1/en active Application Filing
- 2008-04-21 US US12/596,868 patent/US8489198B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP2151009A1 (en) | 2010-02-10 |
US20100131033A1 (en) | 2010-05-27 |
US8489198B2 (en) | 2013-07-16 |
WO2008132653A1 (en) | 2008-11-06 |
EP2151009B1 (en) | 2016-07-13 |
CN101669250B (zh) | 2014-09-10 |
JP2010524621A (ja) | 2010-07-22 |
CN101669250A (zh) | 2010-03-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5693952B2 (ja) | 安全モードを有するアンテナシステム | |
US20110160565A1 (en) | Detecting proximity to mri scanner | |
US8423133B2 (en) | Switched protective device against electromagnetic interference | |
US8554335B2 (en) | Method and apparatus for disconnecting the tip electrode during MRI | |
US8945090B2 (en) | Implantable radiopaque marking | |
US20160256695A1 (en) | Mri compatible implantable medical devices and methods | |
US10231774B2 (en) | Apparatus and method for spatially selective interventional neuroparticles | |
CN104379211A (zh) | 用于检测磁共振成像场的设备和技术 | |
US9364663B2 (en) | Detector for electromagnetic fields | |
CN110383628A (zh) | 多回路植入物充电器 | |
US8710841B2 (en) | Sensing during magnetic resonance imaging | |
US20120330382A1 (en) | Lead for implantable cardiac prosthesis with integrated protection against the effects of mri fields | |
US10130822B2 (en) | System and method for protecting against magnetic fields produced by MRI | |
US10220216B2 (en) | Implantable medical device including eddy current reducing battery | |
US9603549B2 (en) | Implantable device with post-MRI cardiac signal sensing adjustment | |
CN107847182A (zh) | 用于mri系统中的rf线圈的方法和装置 | |
CN103328039B (zh) | 用于检测磁共振成像场的技术 | |
US20150157855A1 (en) | MRI-Safe Implant Electronics | |
Tanaka et al. | FEM simulations of implantable cardiac pacemaker EMI triggered by HF-band wireless power transfer system | |
WO2014153502A2 (en) | Apparatus and method for spatially selective interventional neuroparticles |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20110415 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20130228 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20130305 |
|
A601 | Written request for extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A601 Effective date: 20130605 |
|
A602 | Written permission of extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A602 Effective date: 20130612 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20130821 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20140501 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20140730 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20150106 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20150204 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 5693952 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |