JP5420347B2 - 二重帯域ダイポールマイクロ波切除アンテナ - Google Patents
二重帯域ダイポールマイクロ波切除アンテナ Download PDFInfo
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
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- A—HUMAN NECESSITIES
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- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
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- A—HUMAN NECESSITIES
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- A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
- A61B2018/00011—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids
- A61B2018/00023—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids closed, i.e. without wound contact by the fluid
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- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00577—Ablation
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- A—HUMAN NECESSITIES
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
- A61B2018/1823—Generators therefor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
- A61B2018/183—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves characterised by the type of antenna
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
- A61B2018/183—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves characterised by the type of antenna
- A61B2018/1838—Dipole antennas
Description
本開示は概して、組織切除処置において使用されるマイクロ波アンテナに関する。さらに詳細には、本開示は、二重帯域能力を有するダイポールマイクロ波アンテナに関する。
特定の疾患の治療には、悪性組織の成長(腫瘍)を破壊することが必要である。腫瘍細胞は、周囲の健康な細胞に傷害を与える温度よりもわずかに低い温度にまで高められると変性することが公知である。したがって、例えば温熱療法のような公知の治療方法は、腫瘍細胞を41℃上回る温度に加熱し、一方、不可逆性の細胞損傷を回避するために、隣接する健康な細胞をより低い温度に維持する。かかる方法は、組織を加熱するために、電磁放射を適用することと関係し、かつ組織の切除および凝固を含む。特に、マイクロ波エネルギーは、組織を凝固および/または切除し、癌性細胞を変性させるか、もしくは殺すために使用される。
本開示の別の局面に従って、3軸マイクロ波アンテナアセンブリが開示される。3軸マイクロ波アンテナは、内側導電体を有するフィードライン、内側導電体の周りに配置された中央導電体、および中央導電体の周りに配置された外側導電体、ならびに高周波数放射区間と低周波数放射区間とを含む放射部分を含む。
3軸マイクロ波アンテナアセンブリであって、
内側導電体と、該内側導電体の周りに配置された中央導電体と、該中央導電体の周りに配置された外側導電体とを含むフィードラインと、
高周波数放射区間と低周波数放射区間とを含む放射部分と
を備えている、3軸マイクロ波アンテナアセンブリ。
上記高周波数放射区間は、上記内部導電体の一部分と上記中央導電体の一部分とを含み、上記低周波数放射区間は、該中央導電体の該一部分と上記外側導電体の一部分とを含む、上記項目のいずれか一項に記載の3軸マイクロ波アンテナアセンブリ。
上記内側導電体の上記一部分は、上記中央導電体から第1の所定の距離を延び、該中央導電体の上記一部分は、上記外側導電体から該第1の所定の距離を延びる、上記項目のいずれか一項に記載の3軸マイクロ波アンテナアセンブリ。
上記第1の所定の距離は、高周波数で供給されるマイクロ波エネルギーの振幅の4分の1波長である、上記項目のいずれか一項に記載のマイクロ波アンテナアセンブリ。
上記外側導電体は管状構造を含み、該管状構造は、その中に空洞を含み、該空洞は、そこを通って冷却流体を循環させるように適合され、該空洞は、該外側導電体の遠位部分から第2の所定の距離に配置される、上記項目のいずれか一項に記載のマイクロ波アンテナアセンブリ。
上記第1の距離の2倍と第2の所定の距離との合計は、低周波数で供給されるマイクロ波エネルギーの振幅の2分の1波長である、上記項目のいずれか一項に記載のマイクロ波アンテナアセンブリ。
上記外側導電体の周りに配置されたチョークをさらに含み、該チョークは、該外側導電体の遠位部分から第2の所定の距離に配置されている、上記項目のいずれか一項に記載のマイクロ波アンテナアセンブリ。
上記第1の距離の2倍と上記第2の所定の距離との合計は、低周波数で供給されるマイクロ波エネルギーの振幅の2分の1波長である、上記項目のいずれか一項に記載のマイクロ波アンテナアセンブリ。
3軸マイクロ波アンテナアセンブリであって、
内側導電体と、該内側導電体の周りに配置された中央導電体と、該中央導電体の周りに配置された外側導電体とを含むフィードラインと、
高周波数放射区間と低周波数放射区間とを含む放射部分と
を備えている、3軸マイクロ波アンテナアセンブリ。
上記高周波数放射区間は、上記内部導電体の一部分と上記中央導電体の一部分とを含み、上記低周波数放射区間は、該中央導電体の該一部分と上記外側導電体の一部分とを含む、上記項目のいずれか一項に記載の3軸マイクロ波アンテナアセンブリ。
上記内側導電体の上記一部分は、上記中央導電体から第1の所定の距離を延び、該中央導電体の上記一部分は、上記外側導電体から該第1の所定の距離を延びる、上記項目のいずれか一項に記載の3軸マイクロ波アンテナアセンブリ。
上記第1の所定の距離は、高周波数で供給されるマイクロ波エネルギーの振幅の4分の1波長である、上記項目のいずれか一項に記載のマイクロ波アンテナアセンブリ。
上記外側導電体は管状構造を含み、該管状構造は、その中に空洞を含み、該空洞は、そこを通って冷却流体を循環させるように適合され、該空洞は、該外側導電体の遠位部分から第2の所定の距離に配置される、上記項目のいずれか一項に記載のマイクロ波アンテナアセンブリ。
上記第1の距離の2倍と第2の所定の距離との合計は、低周波数で供給されるマイクロ波エネルギーの振幅の2分の1波長である、上記項目のいずれか一項に記載のマイクロ波アンテナアセンブリ。
上記外側導電体の周りに配置されたチョークをさらに含み、該チョークは、該外側導電体の遠位部分から第2の所定の距離に配置されている、上記項目のいずれか一項に記載のマイクロ波アンテナアセンブリ。
上記第1の距離の2倍と上記第2の所定の距離との合計は、低周波数で供給されるマイクロ波エネルギーの振幅の2分の1波長である、上記項目のいずれか一項に記載のマイクロ波アンテナアセンブリ。
損傷を形成する方法であって、
第1の所定の長さを有する第1の周波数放射区間と、第2の所定の長さを有する第2の周波数放射区間とを備えている3軸マイクロ波アンテナアセンブリを提供するステップと、
損傷の少なくとも1つの特性を調節するために、第1の周波数および第2の周波数のうちの少なくとも1つで、マイクロ波エネルギーを供給して、該第1の周波数放射区間および該第2の放射区間のうちの少なくとも1つに選択的にエネルギーを与えるステップと
を包含する、方法。
上記損傷の少なくとも1つの特性は、形状、直径および深さから成る群から選択される、上記項目のいずれか一項に記載の方法。
高周波数でマイクロ波エネルギーを供給して、上記3軸マイクロ波アンテナアセンブリの上記第1の周波数放射区間にエネルギーを与えるステップをさらに包含する、上記項目のいずれか一項に記載の方法。
低周波数でマイクロ波エネルギーを供給して、上記3軸マイクロ波アンテナアセンブリの上記第2の周波数放射区間にエネルギーを与えるステップをさらに包含する、上記項目のいずれか一項に記載の方法。
上記提供するステップの上記3軸マイクロ波アンテナアセンブリは、内側導電体と、該内側導電体の周りに配置された中央導電体と、該中央導電体の周りに配置された外側導電体とを含む、上記項目のいずれか一項に記載の方法。
上記提供するステップの上記第1の放射区間は、上記内側導電体の少なくとも一部分と、上記中央導電体の少なくとも一部分とを含む、上記項目のいずれか一項に記載の方法。
上記内側導電体の上記一部分は、上記中央導電体から第1の所定の距離を延び、該中央導電体の上記一部分は、上記外側導電体から該第1の所定の距離を延び、それによって上記第1の所定の長さは、該第1の所定の距離の約2倍に等しい、上記項目のいずれか一項に記載の方法。
上記第1の所定の距離は、上記第1の周波数で供給されるマイクロ波エネルギーの振幅の4分の1波長である、上記項目のいずれか一項に記載の方法。
上記提供するステップの上記第2の放射区間は、上記中央導電体の少なくとも一部分と、上記外側導電体の少なくとも一部分とを含み、該外側導電体の該一部分は、第2の所定の距離においてチョークされる、上記項目のいずれか一項に記載の方法。
上記第2の所定の長さは、上記第1の所定の長さと上記第2の所定の距離のおよその合計に等しく、これは、上記第2の周波数で供給されるマイクロ波エネルギーの振幅の2分の1波長である、上記項目のいずれか一項に記載の方法。
3軸マイクロ波アンテナアセンブリが開示される。3軸マイクロ波アンテナは、内側導電体を有するフィードライン、内側導電体の周りに配置された中央導電体、および中央導電体の周りに配置された外側導電体、ならびに高周波数放射区間と低周波数放射区間とを含む放射部分を含む。
本開示の特定の実施形態が、添付の図面を参照して以下、本明細書に記述される。以下の記述において、構造の周知の機能は、本開示を不必要な詳細によって不明確にすることを回避するために、詳細には記述されない。
Claims (8)
- 3軸マイクロ波アンテナアセンブリであって、
内側導電体と、該内側導電体の周りに配置された中央導電体と、該中央導電体の周りに配置された外側導電体とを含むフィードラインと、
高周波数放射区間と低周波数放射区間とを含む放射部分と、
該外側導電体の周囲に配置されたチョークであって、該チョークの位置は、低周波数においてのみマイクロ波エネルギーの帯域幅を限定し、高周波数においてマイクロ波エネルギーの印加に干渉しない、チョークと
を備えている、3軸マイクロ波アンテナアセンブリ。 - 前記高周波数放射区間は、前記内部導電体の一部分と前記中央導電体の一部分とを含み、前記低周波数放射区間は、該中央導電体の該一部分と前記外側導電体の一部分とを含む、請求項1に記載の3軸マイクロ波アンテナアセンブリ。
- 前記内側導電体の前記一部分は、前記中央導電体から第1の所定の距離を延び、該中央導電体の前記一部分は、前記外側導電体から該第1の所定の距離を延びる、請求項2に記載の3軸マイクロ波アンテナアセンブリ。
- 前記第1の所定の距離は、高周波数で供給されるマイクロ波エネルギーの振幅の4分の1波長である、請求項3に記載のマイクロ波アンテナアセンブリ。
- 前記外側導電体は管状構造を含み、該管状構造は、その中に空洞を含み、該空洞は、そこを通って冷却流体を循環させるように適合され、該空洞は、該外側導電体の遠位部分から第2の所定の距離に配置される、請求項2に記載のマイクロ波アンテナアセンブリ。
- 前記第1の距離の2倍と第2の所定の距離との合計は、低周波数で供給されるマイクロ波エネルギーの振幅の2分の1波長である、請求項3に記載のマイクロ波アンテナアセンブリ。
- 前記チョークは、前記外側導電体の遠位部分から第2の所定の距離に配置されている、請求項6に記載のマイクロ波アンテナアセンブリ。
- 前記第1の距離の2倍と前記第2の所定の距離との合計は、低周波数で供給されるマイクロ波エネルギーの振幅の2分の1波長である、請求項7に記載のマイクロ波アンテナアセンブリ。
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US12/197,473 | 2008-08-25 | ||
US12/197,473 US9173706B2 (en) | 2008-08-25 | 2008-08-25 | Dual-band dipole microwave ablation antenna |
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JP2010050975A JP2010050975A (ja) | 2010-03-04 |
JP5420347B2 true JP5420347B2 (ja) | 2014-02-19 |
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JP2009193371A Active JP5420347B2 (ja) | 2008-08-25 | 2009-08-24 | 二重帯域ダイポールマイクロ波切除アンテナ |
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EP (1) | EP2158868B1 (ja) |
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-
2008
- 2008-08-25 US US12/197,473 patent/US9173706B2/en active Active
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2009
- 2009-08-24 CA CA2676522A patent/CA2676522C/en not_active Expired - Fee Related
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CA2676522C (en) | 2016-11-29 |
EP2158868A1 (en) | 2010-03-03 |
US20160361118A1 (en) | 2016-12-15 |
US9439730B2 (en) | 2016-09-13 |
US20100045558A1 (en) | 2010-02-25 |
JP2010050975A (ja) | 2010-03-04 |
AU2009212766B2 (en) | 2013-09-19 |
EP2158868B1 (en) | 2012-10-24 |
AU2009212766A1 (en) | 2010-03-11 |
US20160045260A1 (en) | 2016-02-18 |
CA2676522A1 (en) | 2010-02-25 |
US9173706B2 (en) | 2015-11-03 |
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