RADIOGRAPHIC PHANTOMS
\ɹˌe͡ɪdɪəɡɹˈafɪk fˈantəmz], \ɹˌeɪdɪəɡɹˈafɪk fˈantəmz], \ɹ_ˌeɪ_d_ɪ__ə_ɡ_ɹ_ˈa_f_ɪ_k f_ˈa_n_t_ə_m_z]\
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Devices or objects in various imaging techniques used to visualize or enhance visualization by simulating conditions encountered in the procedure. Phantoms are used very often in procedures employing or measuring x-irradiation or radioactive material to evaluate performance. Phantoms often have properties similar to human tissue. Water demonstrates absorbing properties similar to normal tissue, hence water-filled phantoms are used to map radiation levels. Phantoms are used also as teaching aids to simulate real conditions with x-ray or ultrasonic machines. (From Iturralde, Dictionary and Handbook of Nuclear Medicine and Clinical Imaging, 1990)
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