Adapted erase method using ultraviolet light and the influence of Ghosting image on a clinical CR image

Takahide Okamoto, Hiroko Ohuchi, Hideyuki Maejima, Toshihiro Minami, Eiji Mogi, Hiroshi Ichiji, Shigeru Furui

研究成果: Conference contribution

抄録

In Storage Phosphor (SP) used for Computed Radiography (CR), the quite stable latent image remains due to impurities and the lattice imperfections by the existence of trapped electron and hole. The quite stable latent image appears again (Ghosting image) by the passage of time etc, is recognized as image, and becomes an artifact in a clinical CR image. This study verified the influence of Ghosting image on a clinical image by a physical characteristic and the subjective evaluation, and examined the method to delete this artifact by the exposure of ultraviolet light as a method of improving image. As a result, Ghosting image can be confirmed by the dose used by the clinical diagnosis study, and it is taken as deterioration of the granularity on a physical characteristic. The decrease of the granularity of about 15% (by winner spectrum) was admitted by the frequency band of 2cycle/mm in SP that had been used for a long term. As the method of improving these, Ghosting image was erased with the ultraviolet light lamp with the peak wavelength at 310nm, and has band from 290 nm to 320 nm, and is useful for the improvement of the image quality. In this study, we examine the influence of Ghosting image on a clinical image, and report on the method to delete them by the exposure to ultraviolet light radiation for the image quality improvement plan that uses the x-ray used for usual clinical diagnosis study.

本文言語English
ホスト出版物のタイトルMedical Imaging 2010
ホスト出版物のサブタイトルPhysics of Medical Imaging
PART 3
DOI
出版ステータスPublished - 2010
イベントMedical Imaging 2010: Physics of Medical Imaging - San Diego, CA, United States
継続期間: 2010 2 152010 2 18

出版物シリーズ

名前Progress in Biomedical Optics and Imaging - Proceedings of SPIE
番号PART 3
7622
ISSN(印刷版)1605-7422

Other

OtherMedical Imaging 2010: Physics of Medical Imaging
国/地域United States
CitySan Diego, CA
Period10/2/1510/2/18

ASJC Scopus subject areas

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

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