\sʌbtɹˈakʃən tˈɛknɪks], \sʌbtɹˈakʃən tˈɛknɪks], \s_ʌ_b_t_ɹ_ˈa_k_ʃ_ə_n t_ˈɛ_k_n_ɪ_k_s]\
Definitions of SUBTRACTION TECHNICS
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Combination or superimposition of two images for demonstrating differences between them (e.g., radiograph with contrast vs. one without, radionuclide images using different radionuclides, radiograph vs. radionuclide image) and in the preparation of audiovisual materials (e.g., offsetting identical images, coloring of vessels in angiograms).
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- A predisposition to interstitial subcutaneous serous or fibrinous infiltrations; subjects suffer from swollen lymph nodes, thickening of tongue, pruritus, seborrhea, gastric and cardiac crises; the condition is aggravated by pilocarpine, but favorably affected atropine adrenalin.