JP2005227169A - 放射線画像変換パネル - Google Patents
放射線画像変換パネル Download PDFInfo
- Publication number
- JP2005227169A JP2005227169A JP2004037077A JP2004037077A JP2005227169A JP 2005227169 A JP2005227169 A JP 2005227169A JP 2004037077 A JP2004037077 A JP 2004037077A JP 2004037077 A JP2004037077 A JP 2004037077A JP 2005227169 A JP2005227169 A JP 2005227169A
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- Prior art keywords
- image conversion
- radiation image
- surface treatment
- conversion panel
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Abstract
【解決手段】気相堆積法で形成された柱状結晶状の輝尽性蛍光体層を有する放射線画像変換パネルである。柱状結晶の表面を表面張力が25mN/m以下の表面処理剤で処理することにより、柱状結晶の間隙に表面処理剤を浸透させて柱状結晶全体を均一に表面処理することができ、輝尽性蛍光体層に励起光の反射・散乱防止、撥水、撥油、防湿、防汚などの機能を付与することができる。
【選択図】図1
Description
[ここで、M1はLi、Na、K、Rb及びCsからなる群から選ばれる少なくとも一種のアルカリ金属であり、M2はBe、Mg、Ca、Sr、Ba、Zn、Cd、Cu及びNiからなる群から選ばれる少なくとも一種の二価金属であり、M3はSc、Y、La、Ce、Pr、Nd、Pm、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、Lu、Al、Ga及びInからなる群から選ばれる少なくとも一種の三価金属であり、X、X’及びX’’はF、Cl、Br及びIからなる群から選ばれる少なくとも一種のハロゲンであり、AはEu、Tb、In、Ga、Cs、Ce、Tm、Dy、Pr、Ho、Nd、Yb、Er、Gd、Lu、Sm、Y、Tl、Na、Ag、Cu及びMgからなる群から選ばれる少なくとも一種の金属であり、a、b、eはそれぞれ0≦a<0.5、0≦b<0.5、0.0001<e≦1.0の範囲の数値を示す。]
[ここで、M1はLi、Na、K、Rb及びCsからなる群から選ばれる少なくとも一種のアルカリ金属であり、M2はBe、Mg、Ca、Sr、Ba、Zn、Cd、Cu及びNiからなる群から選ばれる少なくとも一種の二価金属であり、M3はSc、Y、La、Ce、Pr、Nd、Pm、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、Lu、Al、Ga及びInからなる群から選ばれる少なくとも一種の三価金属であり、
X、X’及びX’’はF、Cl、Br及びIからなる群から選ばれる少なくとも一種のハロゲンであり、AはEu、Tb、In、Ga、Cs、Ce、Tm、Dy、Pr、Ho、Nd、Yb、Er、Gd、Lu、Sm、Y、Tl、Na、Ag、Cu及びMgからなる群から選ばれる少なくとも一種の金属であり、a、b、eはそれぞれ0≦a<0.5、0≦b<0.5、0.0001<e≦1.0の範囲の数値を示す。]
CsBr:eEu ・・・(2)
[ここで、eは0.0001<e≦1.0の範囲の数値を示す。]
蛍光体プレートを表面処理剤液に2分間浸漬し、1cm/secの速度で引き上げた後に、40℃の環境下で1時間乾燥して表面処理を実施した。フッ素化表面処理剤液として、サイトップ(表面張力19mN/m、屈折率1.34、旭硝子社製)を用いた。
<比較例>
表面処理を行わなかった。
放射線画像変換パネルに鉛製のMTFチャートを通して管電圧80kVpのX線を照射した後、パネルHe−Neレーザー光(633nm)で操作して励起し、蛍光体層から放射される輝尽発光を受光器(分光感度S−5の光電子像倍管)で受光して電気信号に変換し、これをアナログ/デジタル変換してハードディスクに記録し、記録をコンピューターで分析してハードディスクに記録されているX線像の変調伝達関数(MTF)を調べた。下記の表1には空間周波数1サイクル/mmにおけるMTF値(%)が示されている。この場合MTF値が高いほど鮮鋭性がよい。
5: 鉛ディスク周縁部、並びに白黒の明度差が明瞭に確認される。
4: 鉛ディスク周縁部がわずかにぼやけるものの、白黒の明度差はほぼ明瞭に確認される。
3: 鉛ディスク周縁部がぼやけて見え、白黒の明度差がやや明瞭でない。
2: 鉛ディスク周縁部、並びに白黒の明度差が不明瞭であり、鉛ディスクサイズを再現していない。
1: 鉛ディスク形状、並びに白黒の明度差が不明瞭であり、中心部の白色度も低い。
実施例2の放射線画像変換パネルでは、鮮鋭性が0.81であり、白黒の明度差がほぼ明瞭に確認された。
実施例3の放射線画像変換パネルでは、鮮鋭性が0.86であり、白黒の明度差が明瞭に確認された。
比較例の放射線画像変換パネルでは、鮮鋭性が0.71であり、白黒の明度差がやや明瞭でなかった。
11 基板
12 輝尽性蛍光体層
13 柱状結晶
15 基板ホルダ
16 蒸気流
17 防湿性保護フィルム
Claims (7)
- 気相堆積法で形成された柱状結晶状の輝尽性蛍光体層を有する放射線画像変換パネルにおいて、前記柱状結晶の表面は表面張力が25mN/m以下の表面処理剤で処理されていることを特徴とする放射線画像変換パネル。
- 前記表面処理剤は屈折率が1.45以下であることを特徴とする請求項1に記載の放射線画像変換パネル。
- 前記表面処理剤はフッ素系ポリマーを含有することを特徴とする請求項1または2に記載の放射線画像変換パネル。
- 前記表面処理剤の溶媒はフッ素系溶媒であることを特徴とする請求項1〜3のいずれか一項に記載の放射線画像変換パネル。
- 前記表面処理剤は輝尽性蛍光体の励起光を吸収する色材を含有することを特徴とする請求項1〜4のいずれか一項に記載の放射線画像変換パネル。
- 前記輝尽性蛍光体層の少なくとも一層は下記一般式(1)で表される輝尽性蛍光体を含有することを特徴とする請求項1〜5のいずれか一項に記載の放射線画像変換パネル。
M1X・aM2X’2・bM3X’’3:eA ・・・(1)
[ここで、M1はLi、Na、K、Rb及びCsからなる群から選ばれる少なくとも一種のアルカリ金属であり、M2はBe、Mg、Ca、Sr、Ba、Zn、Cd、Cu及びNiからなる群から選ばれる少なくとも一種の二価金属であり、M3はSc、Y、La、Ce、Pr、Nd、Pm、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、Lu、Al、Ga及びInからなる群から選ばれる少なくとも一種の三価金属であり、X、X’、及びX’’はF、Cl、Br及びIからなる群から選ばれる少なくとも一種のハロゲンであり、AはEu、Tb、In、Ga、Cs、Ce、Tm、Dy、Pr、Ho、Nd、Yb、Er、Gd、Lu、Sm、Y、Tl、Na、Ag、Cu及びMgからなる群から選ばれる少なくとも一種の金属であり、a、b、eはそれぞれ0≦a<0.5、0≦b<0.5、0.0001<e≦1.0の範囲の数値を示す。] - 前記輝尽性蛍光体層の少なくとも一層は下記一般式(2)で表される輝尽性蛍光体を含有することを特徴とする請求項1〜6のいずれか一項に記載の放射線画像変換パネル。
CsBr:eEu ・・・(2)
[ここで、eは0.0001<e≦1.0の範囲の数値を示す。]
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JP2004037077A JP2005227169A (ja) | 2004-02-13 | 2004-02-13 | 放射線画像変換パネル |
EP05250763A EP1566813A2 (en) | 2004-02-13 | 2005-02-10 | Radiation image conversion panel |
US11/053,917 US7199381B2 (en) | 2004-02-13 | 2005-02-10 | Radiation image conversion panel |
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Cited By (4)
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WO2007040042A1 (ja) * | 2005-09-30 | 2007-04-12 | Konica Minolta Medical & Graphic, Inc. | 放射線用シンチレータプレート及び放射線画像検出器 |
JP2007273498A (ja) * | 2006-03-30 | 2007-10-18 | Kyocera Corp | 波長変換器および発光装置 |
JP2015010837A (ja) * | 2013-06-26 | 2015-01-19 | 日立Geニュークリア・エナジー株式会社 | 放射線計測装置 |
JP2022522210A (ja) * | 2019-03-05 | 2022-04-14 | キヤノン株式会社 | ガス透過性スーパーストレート及びその使用方法 |
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US20060049370A1 (en) * | 2004-09-09 | 2006-03-09 | Konica Minolta Medical & Graphic, Inc. | Method for producing radiation image conversion panel |
EP2067841A1 (en) | 2007-12-06 | 2009-06-10 | Agfa HealthCare NV | X-Ray imaging photostimulable phosphor screen or panel. |
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EP1160303A3 (en) * | 2000-06-01 | 2003-09-10 | Fuji Photo Film Co., Ltd. | Preparation of stimulable phosphor sheet |
US6815092B2 (en) * | 2001-12-05 | 2004-11-09 | Agfa-Gevaert | Radiation image storage panel |
US6967339B2 (en) * | 2002-03-26 | 2005-11-22 | Agfa-Gevaert | Needle-shaped cylindrical storage phosphor crystals |
US7026631B2 (en) * | 2002-05-31 | 2006-04-11 | Konica Corporation | Radiation image conversion panel and preparation method thereof |
US20040241395A1 (en) * | 2003-05-29 | 2004-12-02 | 3M Innovative Properties Company | Method of modifying a surface of a substrate and articles therefrom |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2007040042A1 (ja) * | 2005-09-30 | 2007-04-12 | Konica Minolta Medical & Graphic, Inc. | 放射線用シンチレータプレート及び放射線画像検出器 |
JPWO2007040042A1 (ja) * | 2005-09-30 | 2009-04-16 | コニカミノルタエムジー株式会社 | 放射線用シンチレータプレート及び放射線画像検出器 |
JP4710907B2 (ja) * | 2005-09-30 | 2011-06-29 | コニカミノルタエムジー株式会社 | 放射線用シンチレータプレート及び放射線画像検出器 |
JP2007273498A (ja) * | 2006-03-30 | 2007-10-18 | Kyocera Corp | 波長変換器および発光装置 |
JP2015010837A (ja) * | 2013-06-26 | 2015-01-19 | 日立Geニュークリア・エナジー株式会社 | 放射線計測装置 |
JP2022522210A (ja) * | 2019-03-05 | 2022-04-14 | キヤノン株式会社 | ガス透過性スーパーストレート及びその使用方法 |
JP7265830B2 (ja) | 2019-03-05 | 2023-04-27 | キヤノン株式会社 | ガス透過性スーパーストレート及びその使用方法 |
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