JP6832852B2 - 磁気共鳴映像法のための強磁性増強 - Google Patents
磁気共鳴映像法のための強磁性増強 Download PDFInfo
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Description
Claims (23)
- 磁気共鳴映像法システムにおける使用のための磁気システムであって、
第1のB0磁石と、第2のB0磁石とを含み、前記磁気共鳴映像法システムのためのB0磁場に寄与する磁場を生成するように構成される、2平面B0磁石と、
前記磁気共鳴映像法システムの撮像領域内の磁束密度を増大させるために、前記2平面B0磁石によって生成される前記磁場の少なくとも一部を取り込んで方向付けるように構成される、少なくとも1つの強磁性コンポーネントと、
前記磁気共鳴映像法システムが異なる場所に輸送されることを可能にする少なくとも1つの機構とを含み、
該少なくとも1つの強磁性コンポーネントは、C形状の強磁性構造を含み、該C形状の強磁性構造は、該強磁性構造の1つの側のみに沿って磁束のための戻り経路を提供し、
前記2平面B0磁石及び前記少なくとも1つの強磁性コンポーネントは、0.1T以下の強度の前記B0磁場を生成するように構成される、
磁気システム。 - B0磁石は、作動させられるときに、前記磁気共鳴映像法システムのために前記B0磁場に寄与する磁場を生成するように構成される、少なくとも1つの電磁石を含む、請求項1に記載の磁気システム。
- 当該磁気システムは、0.1T以下であり且つ20mT以上である強度にある前記B0磁場を生成するように構成される、
請求項1に記載の磁気システム。 - 当該磁気システムは、20mT以下であり且つ10mT以上である強度にある前記B0磁場を生成するように構成される、
請求項1に記載の磁気システム。 - 前記少なくとも1つの電磁石は、前記磁場を生成するよう、銅又はアルミニウム導体を使用して巻回される少なくとも1つの電磁石コイルを含み、当該磁気システムは、0.1T以下であり且つ20mT以上である強度にある前記B0磁場を生成するように構成される、請求項1に記載の磁気システム。
- 前記少なくとも1つの電磁石は、2平面構成において配置される第1のB0コイルと第2のB0コイルとを含む一対のB0コイルを含み、前記少なくとも1つの強磁性コンポーネントは、前記第1のB0コイルと前記第2のB0コイルとの間の前記撮像領域において前記B0磁場の磁場強度を増大させ且つ/或いは前記B0磁場の同質性を変更するように構成される、請求項2に記載の磁気システム。
- 前記少なくとも1つの強磁性コンポーネントは、強磁性構造を含み、該強磁性構造は、該強磁性構造を通じて前記第1のB0コイル及び前記第2のB0コイルによって生成される磁束のための少なくとも1つの戻り経路を提供する磁性回路を形成するよう前記第1のB0コイル及び前記第2のB0コイルに接続される、請求項6に記載の磁気システム。
- 前記強磁性構造は、少なくとも1つの面取りされた隅部を含み、該少なくとも1つの面取りされた隅部は、該少なくとも1つの面取りされた隅部の回りの磁気抵抗を減少させる、請求項7に記載の磁気システム。
- 前記少なくとも1つの強磁性コンポーネントは、前記磁束が前記強磁性構造から出る場所を変更するよう、前記第1のB0コイル及び/又は前記第2のB0コイルに隣接して配置される少なくとも1つの強磁性コンポーネントを更に含む、請求項7に記載の磁気システム。
- 前記強磁性構造は、第1の強磁性材料を含み、前記第1のB0コイル及び/又は前記第2のB0コイルに隣接して配置される前記少なくとも1つの強磁性コンポーネントは、前記第1の強磁性材料とは異なる第2の強磁性材料を含む、請求項9に記載の磁気システム。
- 前記少なくとも1つの強磁性コンポーネントは、1つ又はそれよりも多くの中実な強磁性コンポーネントを含む、請求項6に記載の磁気システム。
- 前記磁気システムは、少なくとも1つのラミネートパネルを含み、該少なくとも1つのラミネートパネルは、その上に加工される少なくとも1つの電磁石コンポーネントを有する、請求項6に記載の磁気システム。
- 前記少なくとも1つのラミネートパネルは、その上に形成される少なくとも1つのB0コイル、少なくとも1つのシムコイル、及び/又は少なくとも1つの勾配コイルを含む、請求項12に記載の磁気システム。
- 前記少なくとも1つの強磁性コンポーネントは、前記第1のB0コイル及び/又は前記第2のB0コイルに隣接して配置される少なくとも1つのシムリングを含む、請求項6に記載の磁気システム。
- 前記少なくとも1つの強磁性コンポーネントは、前記第1のB0コイル及び/又は前記第2のB0コイルに隣接して配置される複数の強磁性シム部品を含む、請求項7に記載の磁気システム。
- 前記少なくとも1つの強磁性コンポーネントは、前記第1のB0コイル及び/又は前記第2のB0コイルに隣接して配置される少なくとも1つの強磁性極部品を含む、請求項6に記載の磁気システム。
- 前記少なくとも1つの強磁性極部品は、非長方形の形状を有する極部品を含む、請求項16に記載の磁気システム。
- 前記少なくとも1つの強磁性コンポーネントは、前記第1のB0コイル及び/又は前記第2のB0コイルのための支持をもたらす支持構造を提供するように構成される、請求項6に記載の磁気システム。
- 前記少なくとも1つの強磁性コンポーネントは、前記少なくとも1つの強磁性コンポーネント内に生成される渦電流を減少させるよう複数の電気的に絶縁されたセグメントを含む、請求項6に記載の磁気システム。
- 前記少なくとも1つの強磁性コンポーネントは、前記少なくとも1つの強磁性コンポーネントの重量を減少させるよう、不均一な厚さを有する、請求項6に記載の磁気システム。
- 前記B0磁石は、前記磁気共鳴映像法システムのための前記B0磁場に寄与する磁場を生成する少なくとも1つの永久磁石を含む、請求項1に記載の磁気システム。
- 前記少なくとも1つのラミネートパネルは、x方向、y方向、及びz方向においてそれぞれ空間符号化をもたらすよう、少なくとも1つのx勾配コイルと、少なくとも1つのy勾配コイルと、少なくとも1つのz勾配コイルとを含む、請求項13に記載の磁気システム。
- 前記少なくとも1つのラミネートパネルは、前記B0磁場に寄与するように構成される少なくとも1つのB0コイルを含み、前記少なくとも1つのラミネートパネルは、2平面構成において配置される第1のラミネートパネル及び第2のラミネートパネルを含む、請求項22に記載の磁気システム。
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