JP4636885B2 - 磁気共鳴対応ステント - Google Patents
磁気共鳴対応ステント Download PDFInfo
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- JP4636885B2 JP4636885B2 JP2004567477A JP2004567477A JP4636885B2 JP 4636885 B2 JP4636885 B2 JP 4636885B2 JP 2004567477 A JP2004567477 A JP 2004567477A JP 2004567477 A JP2004567477 A JP 2004567477A JP 4636885 B2 JP4636885 B2 JP 4636885B2
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- stent
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/88—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure the wire-like elements formed as helical or spiral coils
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
-
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/88—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure the wire-like elements formed as helical or spiral coils
- A61F2/885—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure the wire-like elements formed as helical or spiral coils comprising a coil including a plurality of spiral or helical sections with alternate directions around a central axis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
- A61F2250/0091—Additional features; Implant or prostheses properties not otherwise provided for transparent or translucent
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Public Health (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Cardiology (AREA)
- Transplantation (AREA)
- Veterinary Medicine (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Description
12 主磁石
14 磁石ボア
16 主傾斜コイル
18 シールド型傾斜コイル
20 低温シールド
22 無線周波コイル機構
30 傾斜増幅器
34 無線周波送信機
36 無線周波受信機
40 シーケンス制御器
42 k空間メモリ
44 再構成プロセッサ
46 画像メモリ
48 ビデオプロセッサ
49 ユーザーインターフェース
50 ステント
51 患者
Claims (16)
- 導電性材料のメッシュと、
前記メッシュ内に配置され、ほぼ管状の構造をなすように前記メッシュを接続する非導電性材料とを有する血管内ステントであって、
前記メッシュの導電性材料における電流の流路を定める導電性材料の接続構成が、前記導電性材料のメッシュの隣接し合うセグメントにおけるセグメント電流が互いに大きさが等しく極性が反対となり、当該ステントにわたって存在する全体としての電流が実質打ち消されるようなものである、
血管内ステント。 - 前記導電性材料のメッシュが、ステントの中心軸に関してほぼ対角方向に配置されている複数の梁材を有していることを特徴とする、請求項1記載の血管内ステント。
- 前記非導電性材料が、前記複数の梁材のうち選択されたものの間に導通があるようにして電流の流路を定める複数の接続材要素を有していることを特徴とする、請求項2記載の血管内ステント。
- 前記梁材を流れる電流が磁気共鳴装置の検査領域内のRF信号によって誘導されることを特徴とする、請求項3記載の血管内ステント。
- 前記セグメントが複数の梁材セグメントである、請求項4記載の血管内ステント。
- 前記導電性メッシュが複数の同軸のループおよび該同軸ループをつなぐ複数の連結部材を有していることを特徴とする、請求項1記載の血管内ステント。
- 前記非導電性材料が複数の絶縁性の接続材要素を有しており、該絶縁性の接続材要素は前記導電性メッシュ内において、該メッシュ内に閉回路ができないように配置されていることを特徴とする、請求項6記載の血管内ステント。
- 前記非導電性材料が複数の絶縁性の接続材要素を有しており、前記同軸ループおよび連結部材は前記絶縁性の接続材要素内で接続され、前記同軸ループは前記接続材要素によって区画されたループ・セグメントを有し、前記接続材要素はループ・セグメントおよび連結部材のうち選択されたものの間に導通があるようにして電流の流路を定める、請求項6記載の血管内ステント。
- 血管内治療用の磁気共鳴に対応したステントであって、
ほぼ管状の構造をなすよう配置された複数の導電性要素と、
前記導電性要素の間に配置された少なくとも一つの非導電性要素とを有しており、
前記少なくとも一つの非導電性要素が、隣接するセグメント電流が互いに打ち消しあうような経路で電流を前記導電性要素に流れさせ、それにより当該ステントに存在する全体としての電流が実質最小化されるようにする複数の接続材要素を有する、磁気共鳴対応ステント。 - 前記電流が磁気共鳴装置の検査領域内のRF信号によって誘導されることを特徴とする、請求項9記載の磁気共鳴対応ステント。
- 前記導電性要素がステントの中心軸に関してほぼ対角方向に配置された梁材を有する、請求項10記載の磁気共鳴対応ステント。
- 前記導電性要素が:
ステントの中心軸のまわりに配置された複数のループと、
ループどうしを結びつけるための複数の連結部材を有しており、ループと連結部材とがステントの中心軸のまわりのほぼ管状の構造を形成するようになっており、
前記少なくとも一つの非導電性要素が、前記導電性要素内に配置され、前記導電性要素内に誘導される電流を導くための複数の絶縁性の接続材要素を有することを特徴とする、請求項10記載の磁気共鳴対応ステント。 - 前記ループおよび連結部材が絶縁性の接続材要素内部で接続されており、それによって隣接するループを流れる電流が互いに実質打ち消しあうようにすることを特徴とする、請求項12記載の磁気共鳴対応ステント。
- ステント内で磁気共鳴装置の検査領域内からのRF信号によって誘導される電流を伝える伝導手段と、
当該ステントに存在する全体としての電流が最小化されるよう、前記伝導手段の隣接し合うセグメントに互いに大きさが等しく極性が反対な電流が流れるように当該ステント内を流れる電流の経路を定めるよう前記伝導手段のセグメントを接続する非伝導手段とを有することを特徴とする、磁気共鳴対応ステント。 - 検査領域内に主磁場を生成し、
前記検査領域中にRF信号を送信することによって、前記検査領域中に置かれ、血管内ステントが留置されている被験者内に磁気共鳴を励起し、ここで、前記血管内ステントは導電性材料のメッシュと、前記メッシュを接続する非導電性材料とを有し、
磁場勾配を通じて被験者内の磁気共鳴を空間的にエンコードし、
被験者からの磁気共鳴信号を受信し、
前記の送信されたRF信号および被験者からの前記磁気共鳴信号の少なくとも一つから血管内ステントに電流を誘導し、前記ステントの導電性材料の接続構成により、前記導電性材料の隣接し合うセグメントにおけるセグメント電流が互いに大きさが等しく極性が反対となり、前記ステントにわたって存在する全体としての電流が最小化されるよう、前記ステントを流れる前記誘導電流の経路を定め、
前記受信した信号を再構成して磁気共鳴画像とする、ステップを有することを特徴とする磁気共鳴撮像の方法。 - ほぼ管状の導電性メッシュを有するステントであって、磁気共鳴検査の際に該メッシュのセグメントに誘導される電流が、隣接するセグメントに流れる大きさが等しく極性が反対な電流によって実質的に打ち消されるよう前記メッシュのセグメントが非導電性材料によって接続されていることを特徴とする、ステント。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US44430203P | 2003-01-31 | 2003-01-31 | |
PCT/IB2003/006365 WO2004066803A2 (en) | 2003-01-31 | 2003-12-19 | Magnetic resonance compatible stent |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006513750A JP2006513750A (ja) | 2006-04-27 |
JP4636885B2 true JP4636885B2 (ja) | 2011-02-23 |
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ID=32825403
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2004567477A Expired - Fee Related JP4636885B2 (ja) | 2003-01-31 | 2003-12-19 | 磁気共鳴対応ステント |
Country Status (6)
Country | Link |
---|---|
US (1) | US7972371B2 (ja) |
EP (1) | EP1594420A2 (ja) |
JP (1) | JP4636885B2 (ja) |
CN (1) | CN100482187C (ja) |
AU (1) | AU2003295183A1 (ja) |
WO (1) | WO2004066803A2 (ja) |
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US20050049688A1 (en) * | 2003-08-25 | 2005-03-03 | Biophan Technologies, Inc. | Electromagnetic radiation transparent device and method of making thereof |
-
2003
- 2003-12-19 WO PCT/IB2003/006365 patent/WO2004066803A2/en active Application Filing
- 2003-12-19 AU AU2003295183A patent/AU2003295183A1/en not_active Abandoned
- 2003-12-19 US US10/542,975 patent/US7972371B2/en not_active Expired - Fee Related
- 2003-12-19 EP EP03786185A patent/EP1594420A2/en not_active Withdrawn
- 2003-12-19 JP JP2004567477A patent/JP4636885B2/ja not_active Expired - Fee Related
- 2003-12-19 CN CN200380109376.6A patent/CN100482187C/zh not_active Expired - Fee Related
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EP1594420A2 (en) | 2005-11-16 |
CN100482187C (zh) | 2009-04-29 |
WO2004066803A2 (en) | 2004-08-12 |
AU2003295183A8 (en) | 2004-08-23 |
US7972371B2 (en) | 2011-07-05 |
WO2004066803A3 (en) | 2004-11-11 |
AU2003295183A1 (en) | 2004-08-23 |
CN1744864A (zh) | 2006-03-08 |
US20060136039A1 (en) | 2006-06-22 |
JP2006513750A (ja) | 2006-04-27 |
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