THE CHARACTERISTICS OF MEDICAL X-RAY FILMS AND THE EFFECT OF THE SILVER CONTENT ON IMAGE QUALITY

概要

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The orthochromatic films have been used in Japan since Eastman Kodak Company introduced the first orthochromatic film "OG" in 1975. We present some results on the evaluation of the film from user's view point on poor silver containing films. The following three results were used for evaluation, namely, 1) the silver content in X-ray films, 2) the characteristic curves of films, and 3) the relationship between the amount of the silver content weight and film characteristics. A flame atomic absorption spectophotometer was used to measure absorbance at 328.0nm. The amounts of silver in X-ray films were studied by measuring various types of films. The "old" regular type films have greater silver weight than "new" type orthochromatic films. From the relationship between silver reduction and film characteristics, we assumed that there was a technical innovation which achieved silver reduction in many orthochromatic films. Though we did not evaluate the image quality of old regular films at this time, we are afraid if there is a trend that such systems decrease flexibility gradually in a long period of time.
公益社団法人日本放射線技術学会の論文
1988-11-01