Tomographic image reconstruction using x-ray phase information

Atsushi Momose, Tohoru Takeda, Yuji Itai, Keiichi Hirano

研究成果: Conference contribution

17 被引用数 (Scopus)

抄録

We have been developing phase-contrast x-ray computed tomography (CT) to make possible the observation of biological soft tissues without contrast enhancement. Phase-contrast x-ray CT requires for its input data the x-ray phase-shift distributions or phase-mapping images caused by an object. These were measured with newly developed fringe-scanning x-ray interferometry. Phase-mapping images at different projection directions were obtained by rotating the object in an x-ray interferometer, and were processed with a standard CT algorithm. A phase-contrast x-ray CT image of a nonstained cancerous tissue was obtained using 17.7 keV synchrotron x rays with 12 micrometer voxel size, although the size of the observation area was at most 5 mm. The cancerous lesions were readily distinguishable from normal tissues. Moreover, fine structures corresponding to cancerous degeneration and fibrous tissues were clearly depicted. It is estimated that the present system is sensitive down to a density deviation of 4 mg/cm 3.

本文言語English
ホスト出版物のタイトルProceedings of SPIE - The International Society for Optical Engineering
編集者Richard L. Van Metter, Jacob Beutel
ページ674-684
ページ数11
出版ステータスPublished - 1996 1月 1
外部発表はい
イベントMedical Imaging 1996: Physics of Medical Imaging - Newport Beach, CA, USA
継続期間: 1996 2月 111996 2月 13

出版物シリーズ

名前Proceedings of SPIE - The International Society for Optical Engineering
2708
ISSN(印刷版)0277-786X

Other

OtherMedical Imaging 1996: Physics of Medical Imaging
CityNewport Beach, CA, USA
Period96/2/1196/2/13

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学

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