{'fraction_non_alphanumeric': 0.0211864406779661, 'fraction_numerical': 0.0, 'mean_word_length': 5.955882352941177, '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}}
[Physical aspects of selected densitometry methods used in the diagnosis of osteoporosis].

Physical background of diagnostic procedures currently applied to assess bone mineral density (single and dual X-ray absorptiometry, quantitative computed tomography and ultrasonography) are described. Special emphasis is given to physical interpretation of diagnostic parameters and to the comparison of the procedures. Systematic errors of the procedures is discussed in detail.