{'fraction_non_alphanumeric': 0.018315018315018316, 'fraction_numerical': 0.0027472527472527475, 'mean_word_length': 5.072222222222222, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Application of a novel laser Doppler tester including a sustainable tissue phantom

A new optical tissue phantom is presented, which consists of a polymer film containing scatterers and absorbers. With this tissue phantom, tissue models can be constructed having optical properties and layered structures similar to those in living tissue. Optical properties can be specified for each layer, with a resolution of 20 micrometers. With this tissue phantom, a new laser Doppler testing principle is developed using a repetitive construction of static and moving layers. In this paper, the consequences of the usage of uniform motion in thin layers are discussed, as compared with the more random motion of blood in tissue. This issue is studied by means of Monte Carlo simulations. Measurements are shown performed with a laser Doppler imager. In particular, the normalization of the flux signal is discussed. It turns out, that normalization with the DC-level of the backscattered light gives better images than normalization with DC2. Also, results of depth sensitivity measurements are shown.