Surgery – Truss – Pad
Patent
1993-07-19
1995-08-15
Cohen, Lee S.
Surgery
Truss
Pad
128664, 128633, 2503411, 356 39, A61B 600
Patent
active
054410541
ABSTRACT:
Modulated light from a light source is incident on the surface of a scattering medium, and light passing through this scattering medium is externally detected. A signal of a predetermined frequency component is extracted from this detection signal to detect a photon density wave propagating in the scattering medium. A signal extracted to correspond to this photon density wave is compared with the signal of the predetermined frequency component constituting the original incident modulated light to detect a predetermined quantitatively measurable parameter such as a phase difference at a detection point. This parameter has a specific relationship with the absorption coefficient by an absorptive constituent in the scattering medium as being derived from the photon diffusion theory, so that the predetermined parameter is appropriately arithmetically processed to obtain various kinds of absorption information (including the linear integration value of the absorption coefficient in the scattering medium and the concentration of a specific material) associated with absorption in the scattering medium.
REFERENCES:
patent: 4515165 (1985-05-01), Carroll
patent: 4767928 (1988-08-01), Nelson et al.
patent: 4945239 (1990-07-01), Wist et al.
patent: 4948974 (1990-08-01), Nelson et al.
patent: 4972331 (1990-11-01), Chance
patent: 5099123 (1992-03-01), Harjunmaa
patent: 5203339 (1993-04-01), Knuttel et al.
patent: 5253646 (1993-10-01), Delpy et al.
patent: 5293210 (1994-03-01), Berndt
Wang et al, "Ballistic Imaging of Biomedical Samples Using Picosecond Optical Kerr Gate", SPIE, vol. 1432, Time-Resolved Spectroscopy and Imaging of Tissues 1991, pp. 97-101.
Toida et al, "The First Demonstration of Laser Computed Tomography Achieved by Coherent Detection Imaging Method for Biomedical Applications", IEICE Transactions. vol. E 74, No. 6, Jun. 1991, pp. 1692-1694.
Toida et al, "Approach to Optical Computer Topography for Highly Scattering Biological Subjects Using an Optical Heterodyne Method", CLEO '90 Conf. Laser and Electro-Optics, 1990 Tech. Dig. Series, pp. 548-550.
Arridge et al, "Reconstruction Methods for Infra-Red Absorption Imaging", SPIE, vol. 1431, 1991, pp. 204-215.
Oda et al, "Non-Invasive Hemoglobin Oxygenation Monitor and Computed Tomography by NIR Spectrophotometry", SPIE, vol. 1431 (1991), pp. 284-293.
Patterson et al, "Applications of Time-Resolved Light Scattering Measurements to Photodynamic Therapy Dosimetry", SPIE, vol. 1203 (1990), pp. 62-75.
Patterson et al, "Time Resolved Reflectance and Transmittance for the Non-Invasive Measurement of Tissue Optical Properties", Applied Optics, vol. 28, No. 12, 1989, pp. 2331-2336.
Sevick et al, "Time-Dependent Photon Migration Imaging", SPIE, vol. 1599, (1991), pp. 273-283.
Fishkin et al, "Diffusion of Intensity Modulated Near-Infrared Light in Turbid Media", SPIE, vol. 1431 (1991), pp. 122-135.
Sevick et al, "Quantitation of Time-and Frequency-Resolved Optical Spectra for the Determination of Tissue Oxygenation", Analytical Biochemistry, vol. 195, pp. 330-351 (1991).
Lakowicz et al, "Advances in Frequency-Domain Fluorometry; Gigahertz Instrumentation; Time-Dependent Photo Migration and Fluorescence Lifetime Imaging", SPIE, vol. 1599, (1991), pp. 227-243.
Casler Brian L.
Cohen Lee S.
Hamamatsu Photonics K.K.
LandOfFree
Apparatus for measuring absorption information in scattering med does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for measuring absorption information in scattering med, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for measuring absorption information in scattering med will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2175573