Three-dimensional diffuse optical mammography with ultrasound localization in a human subject
| Autor: | Bruce J. Tromberg, John Butler, Joshua B. Fishkin, D. D. Kidney, Arjun G. Yodh, Britton Chance, Natasha Shah, Monica J. Holboke, Xingde Li |
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| Rok vydání: | 1999 |
| Předmět: |
Photon
Materials science Light Biomedical Engineering Breast Neoplasms Sensitivity and Specificity Absorption Biomaterials Diagnosis Differential Optics Nuclear magnetic resonance medicine Image Processing Computer-Assisted Mammography Humans Scattering Radiation Photons Spectroscopy Near-Infrared medicine.diagnostic_test business.industry Scattering Ultrasound Ductal carcinoma Atomic and Molecular Physics and Optics Diffuse optical imaging Electronic Optical and Magnetic Materials Carcinoma Intraductal Noninfiltrating Attenuation coefficient Female Ultrasonography Mammary business Refractive index |
| Zdroj: | Holboke, MJ; Tromberg, BJ; Li, X; Shah, N; Fishkin, J; Kidney, D; et al.(2000). Three-dimensional diffuse optical mammography with ultrasound localization in a human subject. Journal of Biomedical Optics, 5(2), 237-247. doi: 10.1117/1.429992. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/3mq659nz |
| ISSN: | 1083-3668 |
| Popis: | We describe an approach that combines clinical ultrasound and photon migration techniques to enhance the sensitivity and information content of diffuse optical tomography. Measurements were performed on a postmenopausal woman with a single 1.8 x 0.9 cm malignant ductal carcinoma in situ approximately 7.4 mm beneath the skin surface (UCI IRB protocol 95-563). The ultrasound-derived information about tumor geometry enabled us to segment the breast tissue into tumor and background regions. Optical data was obtained with a multifrequency, multiwavelength hand-held frequency-domain photon migration backscattering probe. The optical properties of the tumor and background were then computed using the ultrasound-derived geometrical constraints. An iterative perturbative approach, using parallel processing, provided quantitative information about scattering and absorption simultaneously with the ability to incorporate and resolve complex boundary conditions and geometries. A three to four fold increase in the tumor absorption coefficient and nearly 50% reduction in scattering coefficient relative to background was observed (lambda = 674, 782, 803, and 849 nm). Calculations of the mean physiological parameters reveal fourfold greater tumor total hemoglobin concentration [Hbtot] than normal breast (67 microM vs 16 microM) and tumor hemoglobin oxygen saturation (SOx) values of 63% (vs 73% and 68% in the region surrounding the tumor and the opposite normal tissue, respectively). Comparison of semi-infinite to heterogeneous models shows superior tumor/background contrast for the latter in both absorption and scattering. Sensitivity studies assessing the impact of tumor size and refractive index assumptions, as well as scan direction, demonstrate modest effects on recovered properties. |
| Databáze: | OpenAIRE |
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