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Proceedings Paper

Imaging of oblique structures in scattering media by time-gated viewing and coherence imaging
Author(s): Juergen Beuthan; Klaus Doerschel; Gerhard J. Mueller; Olaf Minet; B. Messer
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Paper 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.

Paper Details

Date Published: 14 September 1993
PDF: 7 pages
Proc. SPIE 1888, Photon Migration and Imaging in Random Media and Tissues, (14 September 1993); doi: 10.1117/12.154676
Show Author Affiliations
Juergen Beuthan, Freie Univ. Berlin (Germany)
Klaus Doerschel, Freie Univ. Berlin (Germany)
Gerhard J. Mueller, Freie Univ. Berlin (Germany)
Olaf Minet, Freie Univ. Berlin (Germany)
B. Messer, Freie Univ. Berlin (Germany)

Published in SPIE Proceedings Vol. 1888:
Photon Migration and Imaging in Random Media and Tissues
Britton Chance; Robert R. Alfano, Editor(s)

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