\sʌbtɹˈakʃən tɛknˈiːks], \sʌbtɹˈakʃən tɛknˈiːks], \s_ʌ_b_t_ɹ_ˈa_k_ʃ_ə_n t_ɛ_k_n_ˈiː_k_s]\
Definitions of SUBTRACTION TECHNIQUES
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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 substance formed by nitric and sulphuric acids cane-sugar; its action on the circulation is similar to that of nitroglycerin.