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  1. C100 医学部/医学系研究科
  2. C100a 雑誌掲載論文
  3. 学術雑誌

Investigation of physical image characteristics and phenomenon of edge enhancement by phase contrast using equipment typical for mammography

http://hdl.handle.net/2237/12035
http://hdl.handle.net/2237/12035
7dfa96aa-64e7-4a8e-8fa7-a2d3d4f3ac3d
名前 / ファイル ライセンス アクション
MPH005134.pdf MPH005134.pdf (2.0 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2009-08-17
タイトル
タイトル Investigation of physical image characteristics and phenomenon of edge enhancement by phase contrast using equipment typical for mammography
言語 en
著者 Yamazaki, Asumi

× Yamazaki, Asumi

WEKO 30912

en Yamazaki, Asumi

Search repository
Ichikawa, Katsuhiro

× Ichikawa, Katsuhiro

WEKO 30913

en Ichikawa, Katsuhiro

Search repository
Kodera, Yoshie

× Kodera, Yoshie

WEKO 30914

en Kodera, Yoshie

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利
言語 en
権利情報 Copyright (2008) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
キーワード
主題Scheme Other
主題 digital mammography
キーワード
主題Scheme Other
主題 phase contrast
キーワード
主題Scheme Other
主題 edge enhancement
キーワード
主題Scheme Other
主題 image characteristics
抄録
内容記述 A technique called phase contrast mammography (PCM) has only recently been applied in clinical examination. In this application, PCM images are acquired at a 1.75× magnification using an x-ray tube for clinical use, and then reduced to the real size of the object by image processing. The images showed enhanced object edges; reportedly, this enhancement occurred because of the refraction of x rays through a cylindrical object. The authors measured the physical image characteristics of PCM to compare the image characteristics of PCM with those of conventional mammography. More specifically, they measured the object-edge-response characteristics and the noise characteristics in the spatial frequency domain. The results revealed that the edge-response characteristics of PCM outperformed those of conventional mammography. In addition, the characteristics changed with the object-placement conditions and the object shapes. The noise characteristics of PCM were better than those of conventional mammography. Subsequently, to verify why object edges were enhanced in PCM images, the authors simulated image profiles that would be obtained if the x rays were refracted and totally reflected by using not only a cylindrical substance but also a planar substance as the object. So, they confirmed that the object edges in PCM images were enhanced because x rays were refracted irrespective of the object shapes. Further, they found that the edge enhancements depended on the object shapes and positions. It was also proposed that the larger magnification than 1.75 in the commercialized system might be more suitable for PCM. Finally, the authors investigated phase-contrast effects to breast tissues by the simulation and demonstrated that PCM would be helpful in the diagnoses of mammography.
言語 en
内容記述タイプ Abstract
出版者
言語 en
出版者 American Institite of Physics
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
DOI
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1118/1.2968091
ISSN
収録物識別子タイプ PISSN
収録物識別子 0094-2405
書誌情報 en : Medical Physics

巻 35, 号 11, p. 5134-5150, 発行日 2008-10-23
フォーマット
application/pdf
著者版フラグ
値 publisher
URI
識別子 http://dx.doi.org/10.1118/1.2968091
識別子タイプ DOI
URI
識別子 http://hdl.handle.net/2237/12035
識別子タイプ HDL
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