JPWO2011040439A1 - 組織の温度分布計測方法および温度分布画像化方法 - Google Patents
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Abstract
Description
核磁気共鳴分光法によって前記被計測対象組織の水成分に依存する水信号と、脂肪成分に依存する脂肪信号とを取得するとともに、前記脂肪信号を、炭化水素基構造の異なる各種脂肪酸成分に分離することによって各種脂肪酸信号を取得し、
前記水信号と水温度との相関関係に基づいて前記高含水組織の温度を測定するとともに、前記各種脂肪酸信号の内の少なくとも1種の脂肪酸信号と脂肪温度との相関関係に基づいて前記脂肪組織の温度を計測することを特徴とする。
Tt=Tf×Rf+Tw×Rw
(Tt:計測単位における被計測対象組織の温度(単位:℃)、Tf:脂肪温度(単位:℃)、Rf:脂肪の含有割合(単位:質量%または体積%)、Tw:水温度(単位:℃)、Rw:水の含有割合(単位:質量%または体積%))
このように計測単位毎に脂肪温度および水温度を合成することによって被計測対象組織の温度分布を計測しているため、高含水組織と脂肪組織との混合組織であっても、正確に温度分布を計測することができる。
Claims (7)
- 脂肪組織、または高含水組織と脂肪組織の混合組織を被計測対象組織とする、該被計測対象組織の温度分布を計測する温度分布計測方法であって、
核磁気共鳴分光法によって前記被計測対象組織の水成分に依存する水信号と、脂肪成分に依存する脂肪信号とを取得するとともに、前記脂肪信号を、炭化水素基構造の異なる各種脂肪酸成分に分離することによって各種脂肪酸信号とし、
前記水信号と水温度との相関関係に基づいて前記高含水組織の温度を測定するとともに、前記各種脂肪酸信号の内の少なくとも1種の脂肪酸信号と脂肪温度との相関関係に基づいて前記脂肪組織の温度を計測することを特徴とする温度分布計測方法。 - 前記被計測対象組織を所定の大きさの計測単位に分割し、計測単位毎に前記水信号および脂肪信号を取得することによって、計測単位毎に前記高含水組織および前記脂肪組織の温度を計測することを特徴とする請求項1に記載の温度分布計測方法。
- 前記計測単位における被計測対象組織の水成分および脂肪成分の含有量に応じて、計測単位毎に得られた水温度および脂肪温度の加重平均値を算出し、該加重平均値を計測単位における被計測対象組織の温度とすることを特徴とする請求項2に記載の温度分布計測方法。
- 前記各種脂肪酸信号のうちCH2基依存信号およびCH3基依存信号の内のいずれか、または両方を用いて前記脂肪組織の温度を計測することを特徴とする請求項1から3のいずれかに記載の温度分布計測方法。
- 複フリップ角法、反転回復法、飽和回復法のいずれかを用いて各種脂肪酸成分の縦緩和時間を測定し、該縦緩和時間を各種脂肪酸信号と脂肪温度との相関パラメータとすることを特徴とする請求項1から4のいずれかに記載の温度分布計測方法。
- 前記各種脂肪酸成分の縦緩和時間の測定と、前記水信号の測定とを同時に行うことを特徴とする請求項5に記載の温度分布計測方法。
- 請求項1から6のいずれかに記載の温度分布計測方法を用いて測定された被計測対象組織の温度分布を、温度の高低を信号の強度に変換してマッピングすることによって、温度分布画像を作成することを特徴とする温度分布画像化方法。
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CN105682550A (zh) * | 2013-10-21 | 2016-06-15 | 皇家飞利浦有限公司 | 具有温度映射的mr成像 |
CN114796531B (zh) * | 2022-03-30 | 2023-08-18 | 华南理工大学 | 一种非金属温度响应性磁共振成像复合材料及其制备方法与应用 |
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US6618608B1 (en) * | 1999-11-30 | 2003-09-09 | Txsonics, Ltd. | Thermal imaging of fat and muscle using a simultaneous phase and magnitude double echo sequence |
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US8478380B2 (en) * | 2007-05-04 | 2013-07-02 | Wisconsin Alumni Research Foundation | Magnetic resonance thermometry in the presence of water and fat |
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