14 September 1993 Imaging of oblique structures in scattering media by time-gated viewing and coherence imaging
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Proceedings Volume 1888, Photon Migration and Imaging in Random Media and Tissues; (1993) https://doi.org/10.1117/12.154676
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States
Abstract
Comparative measurements were undertaken in the imaging of oblique structures in scattering media. First, an experimental set-up is described for an optically switched ps-radar. Hereby, laser pulses with duration of 3 ps are used to illuminate the object and an optically switched Kerr-gate which is selecting the light pulses scattered by the object (blood-vessel-phantom). The power of the set-up is demonstrated by the identification of this phantom embedded in several kinds of human tissue. The depth of observation was found in the range of 2 mm to 5 mm. Second, the coherence imaging (CI) is a new technique for non-invasive cross-sectional imaging of biological structure based on low coherence interferometry. In a modified Mach- Zehnder-Interferometer we positioned a phantom (tray with intralipid solution with test structure inside). The transmitted photons were optically modulated. These marked `coherent photons' were detected during an on-dimensional scan through the test structure in the scattering media.
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Juergen Beuthan, Juergen Beuthan, Klaus Doerschel, Klaus Doerschel, Gerhard J. Mueller, Gerhard J. Mueller, Olaf Minet, Olaf Minet, B. Messer, B. Messer, } "Imaging of oblique structures in scattering media by time-gated viewing and coherence imaging", Proc. SPIE 1888, Photon Migration and Imaging in Random Media and Tissues, (14 September 1993); doi: 10.1117/12.154676; https://doi.org/10.1117/12.154676
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