Spatial resolution in photon diffusion imaging from measurements of time-resolved transmittance

Heidrun Wabnitz; R. Willenbrock; Joerg Neukammer; Uwe Sukowski; Herbert H. Rinneberg

doi:10.1117/12.154674

14 September 1993 Spatial resolution in photon diffusion imaging from measurements of time-resolved transmittance

Heidrun Wabnitz, R. Willenbrock, Joerg Neukammer, Uwe Sukowski, Herbert H. Rinneberg

Proceedings Volume 1888, Photon Migration and Imaging in Random Media and Tissues; (1993) https://doi.org/10.1117/12.154674
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

We have measured time-resolved transmittance of ps laser pulses through scattering suspensions of thickness d employing time-correlated single photon counting. When absorption is neglected time-resolved transmittance and its Fourier transform can be expressed in terms of scaled variables, i.e. time (Theta) and angular frequency (Omega) , respectively. We have complemented our investigations on resolution by imaging translucent and absorbing objects embedded in animal tissue in vitro. Objects below the resolution limit, i.e. bars with cross sections 6 mm by 3 mm were detected at the center position of tissue being 4 cm thick. This was achieved by selecting sufficiently short initial time intervals, corresponding to fractions f < 0.1, enhancing contrast considerably in this way.

Citation Download Citation

Heidrun Wabnitz, R. Willenbrock, Joerg Neukammer, Uwe Sukowski, and Herbert H. Rinneberg "Spatial resolution in photon diffusion imaging from measurements of time-resolved transmittance", Proc. SPIE 1888, Photon Migration and Imaging in Random Media and Tissues, (14 September 1993); https://doi.org/10.1117/12.154674

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