Comparisons of diffuse optical imaging between direct-current and amplitude-modulation instrumentations

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• 作者：Liang-Yu Chen ; Jhao-Ming Yu ; Min-Cheng Pan…
• 关键词：Diffuse optical imaging ; Direct ; current NIR ; Amplitude ; modulation NIR ; Phantom design ; Slab ; type imaging module
• 刊名：Optical and Quantum Electronics
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：48
• 期：2
• 全文大小：1,799 KB
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• 作者单位：Liang-Yu Chen (1) (2)
  Jhao-Ming Yu (1)
  Min-Cheng Pan (3)
  Sheng-Yih Sun (4)
  Chia-Cheng Chou (4)
  Min-Chun Pan (1) (2)
  
  1. Department of Mechanical Engineering, National Central University, Taoyuan City, 320, Taiwan, R.O.C.
  2. Graduate Institute of Biomedical Engineering, National Central University, Taoyuan City, 320, Taiwan, R.O.C.
  3. Department of Electronic Engineering, Tung-Nan University, New Taipei City, 222, Taiwan, R.O.C.
  4. Tao-Yuan General Hospital, Taoyuan City, 330, Taiwan, R.O.C.
  
• 刊物主题：Optics, Optoelectronics, Plasmonics and Optical Devices; Electrical Engineering; Characterization and Evaluation of Materials; Computer Communication Networks;
• 出版者：Springer US
• ISSN：1572-817X

文摘

Breast tissues like fatty and fibroglandular ones are adipose mainly and possess high scattering nature, so that they diffuse and make the light approximately uniformly distribute over the measured cross-section besides absorbing to reduce the light intensity. Strong cause-and-effect relationships exist between absorption and intensity decay, and between scattering and phase delay as well. Thereby in a diffuse optical imaging system it is a general practice to estimate absorption coefficients from the measured intensity since it reflects most of the absorption property. This study aims to illustrate that both μ _a and μ _s ′ images of breast can be reconstructed by only direct-current data reliably to a certain extent. Varied sets of phantom design with assigned absorption/scattering properties for inclusion and background were synthesized and image reconstructed to demonstrate this perspective. Moreover, we employed a slab-type diffuse optical imaging system with a dual-direction direct-current NIR measurement module, where reconstructed images were compared between with and without reflectance NIR data.