Complete erasing of ghost images caused by deeply trapped electrons on computed radiography plates

H. Ohuchi, Y. Kondo

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

The ghost images, i.e., latent image that is unerasable with visible light (LIunVL) and reappearing image appeared on computed radiography (CR) plates were completely erased by simultaneous exposing them to filtered ultraviolet light and visible light. Three different types of CR plates (Agfa, Kodak, and Fuji) were irradiated with 50 kV X-ray beams in the dose range 8.1 mGy to 8.0 Gy, and then conventionally erased for 2 h with visible light. The remaining LIunVL could be erased by repeating 6 h simultaneous exposures to filtered ultraviolet light and visible light. After the sixth round of exposure, all the LIunVL in the three types of CR plates were erased to the same level as in an unirradiated plate and no latent images reappeared after storage at 0°C for 14 days. The absorption spectra of deep centers were specified using polychromatic ultraviolet light from a deep-ultraviolet lamp. It was found that deep centers showed a dominant peak in the absorption spectra at around 324 nm for the Agfa and Kodak plates, and at around 320 nm for the Fuji plate, in each case followed by a few small peaks. After completely erasing CR plates, these peaks were no longer observed.

本文言語English
ホスト出版物のタイトルMedical Imaging 2011
ホスト出版物のサブタイトルPhysics of Medical Imaging
DOI
出版ステータスPublished - 2011 5 13
イベントMedical Imaging 2011: Physics of Medical Imaging - Lake Buena Vista, FL, United States
継続期間: 2011 2 132011 2 17

出版物シリーズ

名前Progress in Biomedical Optics and Imaging - Proceedings of SPIE
7961
ISSN(印刷版)1605-7422

Other

OtherMedical Imaging 2011: Physics of Medical Imaging
国/地域United States
CityLake Buena Vista, FL
Period11/2/1311/2/17

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 生体材料
  • 原子分子物理学および光学
  • 放射線学、核医学およびイメージング

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