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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/2237/120357dfa96aa-64e7-4a8e-8fa7-a2d3d4f3ac3d
名前 / ファイル | ライセンス | アクション |
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MPH005134.pdf (2.0 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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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× Ichikawa, Katsuhiro× Kodera, Yoshie |
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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 |
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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 |