Deeply trapped electrons in photostimulated luminescent materials and their utilization for extending the dynamic range

• Project/Area Number: 21560867
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Nuclear engineering
• Research Institution: Tohoku University
• Principal Investigator: HIROKO Yoshida 東北大学, 大学院・薬学研究科, 講師 (10241522)
• Co-Investigator(Renkei-kenkyūsha): YASUDA Hiroshi 独立行政法人放射線医学総合研究所, 放射線防護研究センター・環境放射線影響グループ, チームリーダー (50250121)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2010: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2009: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 保健物理 / 環境安全 / 輝尽性蛍光体 / 放射線・X線・粒子線 / イメージングプレート / 固体物理 / 固体検出器 / 消去不全光 / ワイドダイナミックレンジ

Research Abstract

By utilizing deeply trapped electrons in overirradiated photostimulated luminescent materials, we have extended the dynamic range of the PSL materials. Deep centers showed specific peaks in the absorption spectra and the peak heights were dose-dependent until 35. 0 Gy X-ray exposure. Electrons can be readout by the method uses two step excitations with ultraviolet light and 630-nm laser light.

Research Products

• [Journal Article] Complete erasing of ghost images on computed radiography plates and role of deeply trapped electrons (2011)
  • Author(s): Hiroko Ohuchi-Yoshida, et al
  • Journal Title: Nucl. Instr. and Meth Volume: 247-251 Pages: 659-659
  • Peer Reviewed
• [Journal Article] Complete erasing of ghost images on computed radiography plates and role of deeply trapped electrons (2011)
  • Author(s): Hiroko Ohuchi-Yoshida, et al
  • Journal Title: Nucl.Instr.and Meth.A Volume: A659 Issue: 1 Pages: 247-251
  • DOI: 10.1016/j.nima.2011.08.064
  • Peer Reviewed
• [Journal Article] Deeply trapped electrons in Imaging Plates and their utilization for extending the dynamic range (2010)
  • Author(s): Hiroko Ohuchi-Yoshida, et al
  • Journal Title: Nucl. Instr. and Meth. A Volume: 468-472 Pages: 621-621
  • Peer Reviewed
• [Journal Article] Adapted erase method using ultraviolet light and the influence of Ghosting imageon a clinical CR image (2010)
  • Author(s): Takahide Okamoto, et al
  • Journal Title: Proc. of SPIE Pages: 7622-7622
  • Peer Reviewed
• [Journal Article] イメージングプレートに生じた消去不全光の紫外-白色光同時照射法による消去 (2010)
  • Author(s): 大内(吉田)浩子
  • Journal Title: RADIOISOTOPES Volume: 81-91
  • Peer Reviewed
• [Journal Article] Deeply trapped electrons in Imaging Plates and their utilization for extending the dynamic range (2010)
  • Author(s): Hiroko Ohuchi, et al
  • Journal Title: Nucl.Instr.and Meth.A Volume: A621 Pages: 468-472
  • Peer Reviewed
• [Journal Article] Adapted erase method using ultraviolet light and the influence of Ghosting image on a clinical CR image (2010)
  • Author(s): Takahide Okamoto, et al
  • Journal Title: Proc.of SPIE Volume: 7622
  • Peer Reviewed
• [Journal Article] エックス線照射後のイメージングプレートに生ずる消去不全現象とその特性 (2010)
  • Author(s): 大内浩子, ほか
  • Journal Title: RADIOISOTOPES 59(1) Pages: 1-10
  • Peer Reviewed
• [Journal Article] イメージングプレートに生じた消去不全光の紫外-白色光同時照射法による消去 (2010)
  • Author(s): 大内浩子, ほか
  • Journal Title: RADIOISOTOPES 59(2) Pages: 81-91
  • Peer Reviewed
• [Presentation] イメージングプレートの画質劣化を引き起こす蛍光体中に深く捕獲された電子とその消去 (2011)
  • Author(s): 大内(吉田)浩子
  • Organizer: 第48回アイソトープ・放射線研究発表会
  • Place of Presentation: 東京
  • Year and Date: 2011-07-07
• [Presentation] Complete erasing of ghost images caused by deeply trapped electrons on computed radiography plates (2011)
  • Author(s): Hiroko Ohuchi-Yoshida
  • Organizer: SPIE Medical Imaging
  • Place of Presentation: USA
  • Year and Date: 2011-02-15
• [Presentation] Complete erasing of ghost images caused by deeply trapped electrons on computed radiography plates (2011)
  • Author(s): Hiroko Ohuchi
  • Organizer: SPIE Medical Imaging 2011
  • Place of Presentation: Orlando, USA
  • Year and Date: 2011-02-14
• [Presentation] 輝尽性蛍光体中に深く捕獲された電子とその利用 (2010)
  • Author(s): 大内(吉田)浩子
  • Organizer: 第48回アイソトープ・放射線研究発表会
  • Place of Presentation: 東京
  • Year and Date: 2010-07-07
• [Presentation] 輝尽性蛍光体中に深く捕獲された電子とその利用 (2010)
  • Author(s): 大内浩子
  • Organizer: 第47回アイソトープ・放射線研究発表会
  • Place of Presentation: 東京
  • Year and Date: 2010-07-07
• [Presentation] 輝尽性蛍光体の短波長領域局在電子を利用した大線量測定法の開発 (2009)
  • Author(s): 大内(吉田)浩子
  • Organizer: 第47回アイソトープ・放射線研究発表会
  • Place of Presentation: 東京
  • Year and Date: 2009-07-01
• [Presentation] 輝尽性蛍光体の短波長領域局在電子を利用した大線量測定法の開発 (2009)
  • Author(s): 大内浩子
  • Organizer: 第46回アイソトープ・放射線研究発表会
  • Place of Presentation: 東京
  • Year and Date: 2009-07-01
• [Presentation] 輝尽性蛍光体(BaFBr(I): Eu2+)の消去不全光を利用した大線量測定法の開発 (2009)
  • Author(s): 大内(吉田)浩子
  • Organizer: 第43回日本保健物理学会研究発表会
  • Place of Presentation: 大阪
  • Year and Date: 2009-06-04
• [Presentation] 輝尽性蛍光体(BaFBr(I):Eu^<2+>)の消去不全光を利用した大線量測定法の開発 (2009)
  • Author(s): 大内浩子
  • Organizer: 第43回日本保健物理学会研究発表会
  • Place of Presentation: 大阪
  • Year and Date: 2009-06-04
• [Presentation] Unerasable latent images observed in computed radiography and their complete erasing (2009)
  • Author(s): Hiroko Ohuchi-Yoshida
  • Organizer: The 51th American Association of Physicists in Medicine
  • Place of Presentation: USA
• [Presentation] Unerasable Latent Images Observed in Computed Radiography and Their Complete Erasing (2009)
  • Author(s): 大内浩子
  • Organizer: The 51th American Association of Physicists in Medicine
  • Place of Presentation: アメリカ,アナハイム