Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Joshua B. Fishkin"'
Publikováno v:
Advances in Optical Imaging and Photon Migration.
We present a light emitting diode (LED) based spectroscopic method for application in highly scattering materials. Using an LED as a light source, frequency domain measurement and the diffusion model of photon migration, we measured the absorption sp
Autor:
Rene Hornung, Joshua B. Fishkin, Natasha Shah, Charlotta Eker, Jenny Espinoza, Bruce J. Tromberg, Albert E. Cerussi, John Butler
Publikováno v:
Proceedings of the National Academy of Sciences. 98:4420-4425
Near infrared diffuse optical spectroscopy and diffuse optical imaging are promising methods that eventually may enhance or replace existing technologies for breast cancer screening and diagnosis. These techniques are based on highly sensitive, quant
Publikováno v:
Review of Scientific Instruments. 71:2500-2513
Near-infrared (NIR) optical properties of turbid media, e.g., tissue, can be accurately quantified noninvasively using methods based on diffuse reflectance or transmittance, such as frequency domain photon migration (FDPM). Factors which govern the a
Autor:
Michael W. Berns, Bruce J. Tromberg, Tuan Pham, Lars O. Svaasand, Thorsten Spott, Joshua B. Fishkin
Publikováno v:
Svaasand, LO; Spott, T; Fishkin, JB; Pham, T; Tromberg, BJ; & Berns, MW. (1999). Reflectance measurements of layered media with diffuse photon-density waves: A potential tool for evaluating deep burns and subcutaneous lesions. Physics in Medicine and Biology, 44(3), 801-813. doi: 10.1088/0031-9155/44/3/020. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/8gb201c7
The basic principles of a non-contact, near-infrared technique for the mapping of layered tissues are discussed theoretically and verified experimentally. The propagation properties of diffuse photon-density waves in tissues depend on the optical pro
Autor:
Joshua B. Fishkin, Tuan Pham, Olivier Coquoz, Mitchell Cahn, Jeffrey D. Gross, David Pham, Bruce J. Tromberg, Vasan Venugopalan, Eric R. Anderson, John Butler
Publikováno v:
Philosophical Transactions of the Royal Society B Biological Sciences, vol 352, iss 1354
A multiwavelength, high bandwidth (1 GHz) frequency–domain photon migration (FDPM) instrument has been developed for quantitative, non–invasive measurements of tissue optical and physiological properties. The instrument produces 300 kHz to 1 GHz
Autor:
Enrico Gratton, William W. Mantulin, Britton Chance, Joshua B. Fishkin, Martin vandeVen, Michael B. Maris
Publikováno v:
Bioimaging. 1:40-46
By combining near-infrared intensity-modulated illumination with frequency domain detection methods, we have obtained the first detailed optical images of thick tissues (1–3 cm). The raw data of these images are characterized by millimetre resoluti
Autor:
Enrico Gratton, Beniamino Barbieri, Joshua B. Fishkin, Sergio Fantini, Maria Angela Franceschini
Publikováno v:
Applied optics. 33(22)
The absorption and scattering coefficient of a macroscopically homogeneous strongly scattering medium (lipid emulsion) containing Methylene Blue is quantitatively measured in the spectral range from 620 to 700 nm. We conduct the measurements in the f
Autor:
Bruce J. Tromberg, Olivier Coquoz, Joshua B. Fishkin, Eric R. Anderson, David Pham, Matthew Brenner, Lars O. Svaasand
Publikováno v:
Biomedical Optical Spectroscopy and Diagnostics.
A 1 GHz multi-frequency, multi-wavelength FDPM instrument is used to quantitatively measure optical properties of normal and malignant cells and tissues in vitro and in vivo, respectively. A spherical cuvette is developed for characterizing cell susp
Publikováno v:
1991 IEEE MTT-S International Microwave Symposium Digest.
Near-infrared imaging of bodily tissues is of prime importance in medicine. The authors present an investigation aimed at understanding the physical principles behind the optical processes occurring in these highly scattering media. Frequency-domain