JPWO2019039477A1 - 原子核スピンの高偏極化方法及び高偏極化装置 - Google Patents
原子核スピンの高偏極化方法及び高偏極化装置 Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
- G01N24/08—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
- G01N24/12—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using double resonance
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- 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
- G01R33/282—Means specially adapted for hyperpolarisation or for hyperpolarised contrast agents, e.g. for the generation of hyperpolarised gases using optical pumping cells, for storing hyperpolarised contrast agents or for the determination of the polarisation of a hyperpolarised contrast agent
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- 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
- G01R33/62—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using double resonance
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Abstract
Description
図1を参照して、本発明の実施の形態に係る原子核スピンの高偏極化装置100は、主磁場形成部102と、主磁場形成部102の磁極間に配置されたキャビティ104と、キャビティ104内に配置された試料106に照射するレーザ光を生成するレーザ光源108と、試料106に照射するマイクロ波を生成するマイクロ波源110と、マイクロ波源110のマイクロ波を増幅する増幅部112とを含む。さらに、原子核スピンの高偏極化装置100は、キャビティ104内に配置された掃引磁場形成部114と、掃引磁場形成部114に電流を供給する電源部116と、NMR信号を検出するためのNMR信号検出部118と、NMR信号検出部118により検出されたNMR信号を分析するNMR分析部120と、各部を制御する制御部122とを含む。
以下に、図3を参照して、図1の原子核スピンの高偏極化装置100を用いて、試料106の原子核スピンを高偏極化させる方法に関して説明する。
第1の実施の形態では、安息香酸誘導体の水素原子核スピンを高偏極化する場合を説明したが、第2の実施の形態では、さらに汎用的に様々な試料の原子核スピンを高偏極化する。
第1の実施の形態では、単色レーザ光を照射し、導波管及びキャビティによりマイクロ波を照射する場合を説明したが、第3の実施の形態では、これらの構成を変更し、装置を小型化する。
102 主磁場形成部
104 キャビティ
106 試料
108 レーザ光源
110 マイクロ波源
112 増幅部
114 掃引磁場形成部
116 電源部
118 NMR信号検出部
120 NMR分析部
122 制御部
130 光伝送部
132 集光部
134 導波管
136 試料収容部
138 溶媒供給部
150 溶媒
152 水溶液
154 液体窒素
156 ヒータ
202 フラッシュランプ
204 誘電体共振器
206 SSPA
Claims (15)
- 一様な静磁場が形成された空間に配置された試料に、光を照射する光照射ステップと、
前記光照射ステップに続き、前記試料に掃引磁場を印加中に、前記試料にマイクロ波を照射するマイクロ波照射ステップとを含み、
前記試料は、固体の安息香酸誘導体にペンタセン誘導体が添加された試料であり、
前記光照射ステップ及び前記マイクロ波照射ステップを繰返した後、前記試料中の安息香酸誘導体を溶解させて溶液を生成する溶解ステップをさらに含む原子核スピンの高偏極化方法。 - 前記試料は、安息香酸誘導体に可溶な可溶性物質がさらに添加され、
前記溶解ステップにおいて、前記試料中の安息香酸誘導体及び前記可溶性物質を溶解させる、請求項1に記載の原子核スピンの高偏極化方法。 - 前記試料中のペンタセン誘導体以外の物質のうち、少なくとも1つの物質は、核スピンがゼロでない炭素、酸素及び窒素の同位体のうち、少なくとも1つの同位体を含む、請求項1に記載の原子核スピンの高偏極化方法。
- 前記光照射ステップ及び前記マイクロ波照射ステップを繰返した後、前記溶解ステップを行なう前に、交差偏極により前記試料中のペンタセン誘導体以外の物質の水素核スピンの偏極を、前記同位体の核スピンに移動させる核スピン偏極ステップを、さらに含む、請求項3に記載の原子核スピンの高偏極化方法。
- 前記溶解ステップにおいて、弱酸遊離を引き起こす分子又はpH調整用の分子の水溶液により、前記試料中のペンタセン誘導体以外の物質を溶解させ、前記溶液を生成する、請求項1に記載の原子核スピンの高偏極化方法。
- 前記溶液を固化させて、固体物質を生成する再固化ステップと、
交差偏極により、前記固体物質中の安息香酸誘導体の原子核スピンの偏極を、前記水溶液に含まれる、弱酸遊離を引き起こす前記分子又はpH調整用の前記分子の原子核スピンに移動させる核スピン移動ステップと、
前記核スピン移動ステップの後、前記固体物質を液化させる液化ステップとを、さらに含む、請求項5に記載の原子核スピンの高偏極化方法。 - 一様な静磁場が形成された空間に配置された試料に、光を照射する光照射ステップと、
前記光照射ステップに続き、前記試料に掃引磁場を印加中に、前記試料にマイクロ波を照射するマイクロ波照射ステップとを含み、
前記試料は、安息香酸誘導体と、安息香酸誘導体以外のパートナー分子とを混合して生成した混合物にペンタセン誘導体が添加された試料であり、
前記光照射ステップ及び前記マイクロ波照射ステップを繰返した後、前記試料中の安息香酸誘導体及びパートナー分子を溶解させて溶液を生成する溶解ステップをさらに含む、原子核スピンの高偏極化方法。 - 前記パートナー分子は、安息香酸誘導体以外のカルボン酸、又は、安息香酸誘導体と塩を形成する塩基であり、
前記混合物は、共結晶状若しくは共晶状の多結晶試料、又は、アモルファス状試料である、請求項7に記載の原子核スピンの高偏極化方法。 - 前記試料は、前記混合物に可溶な可溶性物質がさらに添加され、
前記溶解ステップにおいて、前記試料中の安息香酸誘導体、パートナー分子、及び可溶性物質を溶解させる、請求項7に記載の原子核スピンの高偏極化方法。 - 前記溶解ステップにより生成された溶液に、核スピンを高偏極化させる対象である対象物質を溶解させるステップと、
前記対象物質が溶解された溶液を固化させて、固体物質を生成する再固化ステップと、
スピン拡散により、前記固体物質中の安息香酸誘導体の原子核スピンの偏極を、前記対象物質中の原子核スピンに移動させるターゲット核スピン偏極ステップと、
前記ターゲット核スピン偏極ステップの後、前記固体物質を液化させる液化ステップとを、さらに含む、請求項1に記載の原子核スピンの高偏極化方法。 - 前記再固化ステップにおいて、前記対象物質が溶解された溶液を凍結させることにより前記固体物質を生成し、
前記液化ステップにおいて、凍結された前記固体物質を、加熱することにより液化させる、請求項10に記載の原子核スピンの高偏極化方法。 - 前記対象物質は、カルボン酸系化合物、アミノ基を有する化合物、糖、生体内分子、又は医薬品分子である、請求項10に記載の原子核スピンの高偏極化方法。
- トリプレットDNPにより試料中の原子核スピンを高偏極化するための装置であって、
静磁場を形成する磁場形成部と、
前記静磁場が形成された領域に配置された前記試料に光を照射する光照射部と、
前記静磁場が形成された領域に配置された前記試料にマイクロ波パルスを照射するマイクロ波照射部と、
前記光照射部及び前記マイクロ波照射部を制御する制御部と、
前記制御部は、前記光照射部及び前記マイクロ波照射部を制御して、トリプレットDNPにより前記試料中の原子核スピンを高偏極化させ、
前記光照射部は、波長が400nm以上600nm以下の範囲に含まれる非コヒーレントな光を出力する、原子核スピンの高偏極化装置。 - 前記マイクロ波照射部は、固体高出力増幅器と、前記静磁場が形成される領域に配置された、空洞共振器とは異なる共振器とを含み、
前記光照射部は、前記共振器の内部に配置された前記試料に光を照射し、
前記マイクロ波照射部は、前記共振器の内部に配置された前記試料に、前記固体高出力増幅器によりマイクロ波パルスを増幅して照射する、請求項13に記載の原子核スピンの高偏極化装置。 - 前記共振器は、誘電体共振器又はループギャップ共振器である、請求項14に記載の原子核スピンの高偏極化装置。
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