JP5030376B2 - シンチレータ組成物、及び関連プロセス及び製造物品 - Google Patents
シンチレータ組成物、及び関連プロセス及び製造物品 Download PDFInfo
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- JP5030376B2 JP5030376B2 JP2004300861A JP2004300861A JP5030376B2 JP 5030376 B2 JP5030376 B2 JP 5030376B2 JP 2004300861 A JP2004300861 A JP 2004300861A JP 2004300861 A JP2004300861 A JP 2004300861A JP 5030376 B2 JP5030376 B2 JP 5030376B2
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- scintillator
- lanthanum
- lanthanide
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/202—Measuring radiation intensity with scintillation detectors the detector being a crystal
- G01T1/2023—Selection of materials
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7772—Halogenides
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- Luminescent Compositions (AREA)
- Measurement Of Radiation (AREA)
- Conversion Of X-Rays Into Visible Images (AREA)
Description
用語「減衰時間」は、シンチレータによって放射された光の強度が、放射線励起が停止した時の光強度の特定の割合にまで減少するのに要する時間をいう。PETデバイスなどの多くの用途において、より短い減衰時間は、これがガンマ線を効率的に同時計数することが可能となることから好ましい。結果として走査時間が低減され、デバイスをより効率的に使用することができる。
上述のように、光検出器は、全て当該技術分野において公知である種々のデバイスとすることができる。非限定的な実施例には、光電子増倍管、光ダイオード、CCDセンサ、及びイメージ増倍管が含まれる。特定の光検出器の選択は、組立てられる放射線検出器の種類及びその意図される用途によって部分的に決定される。
Claims (10)
- 高エネルギ放射線を検出するための結晶シンチレータ組成物であって、
(a)(i)少なくとも2種類のハロゲン化ランタニドの固溶体と、(ii)酸素含有量0.1モル%未満のヨウ化ランタンとからなる群から選択されたハライド−ランタニド・マトリクス材料と、
(b)セリウムと、プラセオジムと、セリウム及びプラセオジムの混合物とからなる群から選択された元素を含む、前記マトリクス材料のための賦活剤と、
これらの何らかの反応生成物と、
を含む結晶シンチレータ組成物。 - 前記マトリクス材料中のランタニドが、ランタン、イットリウム、ガドリニウム、ルテチウム、スカンジウム、及びこれらの混合物からなる群から選択されることを特徴とする請求項1に記載の結晶シンチレータ組成物。
- 成分(i)の前記ハロゲン化ランタニドが、臭化ランタン、塩化ランタン、ヨウ化ランタン、塩化ルテチウム、臭化ルテチウム、塩化イットリウム、臭化イットリウム、塩化ガドリニウム、臭化ガドリニウム、塩化プラセオジム、臭化プラセオジム、及びこれらの混合物からなる群から選択されることを特徴とする請求項1に記載の結晶シンチレータ組成物。
- 前記固溶体が、塩化ランタン及び臭化ランタンを含むことを特徴とする請求項1に記載の結晶シンチレータ組成物。
- 前記固溶体が、ヨウ化ランタンを更に含むことを特徴とする請求項4に記載の結晶シンチレータ組成物。
- 少なくとも2種類のハロゲン化ランタニドの混合物を含むセリウムドープ・結晶シンチレータ組成物。
- 酸素含有量0.1モル%未満のヨウ化ランタンを含むセリウムドープ・結晶シンチレータ組成物。
- 高エネルギ放射線を検出するための放射線検出器であって、
(A)結晶シンチレータであって、
(a)(i)少なくとも2種類のハロゲン化ランタニドの固溶体と(ii)酸素含有量0.1モル%未満のヨウ化ランタンとからなる群から選択されたハライド−ランタニド・マトリクス材料と、
(b)セリウム、プラセオジム、及びセリウムとプラセオジムとの混合物からなる群から選択された元素を含む、前記マトリクス材料のための賦活剤と、
から構成される組成物と、これらの何らかの反応生成物とを含む結晶シンチレータと、
(B)前記シンチレータによって発生する光パルスの放出に応答して電気信号を発生できるように前記シンチレータに光学的に結合された光検出器と、
を備える放射線検出器。 - シンチレータ検出器を用いる高エネルギ放射線の検出方法であって、
(A)前記放射線の特性を示すフォトンを発生するように、賦活ハライド−ランタニドベース・シンチレータで前記放射線を受ける段階と、
(B)前記シンチレータの結晶に結合されたフォトン検出器を用いて前記フォトンを検出する段階と、
を含み、
前記シンチレータ結晶が、
(a)(i)少なくとも2種類のハロゲン化ランタニドの固溶体と(ii)酸素含有量0.1モル%未満のヨウ化ランタンとからなる群から選択されたハライド−ランタニド・マトリクス材料と、
(b)セリウムと、プラセオジムと、セリウム及びプラセオジムの混合物とからなる群から選択された元素を含む、前記マトリクス材料のための賦活剤と、
これらの何らかの反応生成物と、
を含む組成物から形成されることを特徴とする方法。 - (a)(i)少なくとも2種類のハロゲン化ランタニドの固溶体と(ii)酸素含有量0.1モル%未満のヨウ化ランタンとからなる群から選択されたハライド−ランタニド・マトリクス材料と、
(b)セリウムと、プラセオジムと、セリウム及びプラセオジムの混合物とからなる群から選択された元素を含む、前記マトリクス材料のための賦活剤と、
を含む賦活ハライド−ランタニドベース・シンチレータ結晶の製造方法であって、
(i)少なくとも1種類のランタニド含有反応物、少なくとも1種類の賦活剤含有反応物、及び少なくとも1種類のハロゲン化物含有反応物を前記シンチレータ結晶についての化学量論的要求を満足させる比率に従って供給する段階と、
(ii)前記反応物を溶融組成物を形成するのに十分な温度で融解する段階と、
(iii)前記溶融組成物から結晶を晶析させる段階と、
を含む方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US10/689,361 US7084403B2 (en) | 2003-10-17 | 2003-10-17 | Scintillator compositions, and related processes and articles of manufacture |
US10/689,361 | 2003-10-17 |
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JP2005120378A JP2005120378A (ja) | 2005-05-12 |
JP5030376B2 true JP5030376B2 (ja) | 2012-09-19 |
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US (1) | US7084403B2 (ja) |
EP (1) | EP1557695B1 (ja) |
JP (1) | JP5030376B2 (ja) |
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US6323489B1 (en) * | 1999-06-04 | 2001-11-27 | Regents Of The University Of California | Single crystal scinitillator |
NL1014401C2 (nl) | 2000-02-17 | 2001-09-04 | Stichting Tech Wetenschapp | Ceriumhoudend anorganisch scintillatormateriaal. |
US6437336B1 (en) | 2000-08-15 | 2002-08-20 | Crismatec | Scintillator crystals and their applications and manufacturing process |
WO2002038628A2 (en) * | 2000-11-07 | 2002-05-16 | Symyx Technologies, Inc. | Substituted pyridyl amine ligands, complexes and catalysts therefrom; processes for producing polyolefins therewith |
US6585913B2 (en) | 2001-07-30 | 2003-07-01 | General Electric Company | Scintillator compositions of alkali and rare-earth tungstates |
US6624422B2 (en) | 2001-09-25 | 2003-09-23 | Ge Medical Systems Global Technology Company, Llc | Method for dynamic stabilization of PET detector gains |
US7022303B2 (en) * | 2002-05-13 | 2006-04-04 | Rutgers, The State University | Single-crystal-like materials |
FR2840926B1 (fr) * | 2002-06-12 | 2005-03-04 | Saint Gobain Cristaux Detecteu | Utilisation d'un creuset comprenant du carbone pour la croissance de cristaux comprenant un halogenure de terre rare |
US7173247B2 (en) | 2003-09-24 | 2007-02-06 | Radiation Monitoring Devices, Inc. | Lu1-xI3:Cex—a scintillator for gamma ray spectroscopy and time-of-flight PET |
US7576329B2 (en) * | 2003-10-17 | 2009-08-18 | General Electric Company | Scintillator compositions, and related processes and articles of manufacture |
-
2003
- 2003-10-17 US US10/689,361 patent/US7084403B2/en not_active Expired - Lifetime
-
2004
- 2004-10-14 EP EP04256333.8A patent/EP1557695B1/en active Active
- 2004-10-15 JP JP2004300861A patent/JP5030376B2/ja active Active
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EP1557695A2 (en) | 2005-07-27 |
US20050082484A1 (en) | 2005-04-21 |
US7084403B2 (en) | 2006-08-01 |
EP1557695B1 (en) | 2017-05-31 |
EP1557695A3 (en) | 2010-01-06 |
JP2005120378A (ja) | 2005-05-12 |
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