骨スキャン定量化の試み

概要

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Purpose : In performing bone scanning at regular intervals for the purpose of evaluating the course of bone disease, all the scintigrams must be made under the same scanning conditions. This is because, on scintiphoto, the activity of bone tissue is expressed in black of different shades, which are dependent on scanning conditions. Even if all scintigrams are taken under the same scaning conditions, any change in disease activity cannot be visualized unless the change it expressed as a difference in the shade of darkening. Moreover, the difference is recorded qualitatively only. These problems all arise from the fact that photographic records are used in the follow-up of disease course. The authors thought it might be possible to make proper quantitative comparisons of scintigrams if such records are kept on the basis of counts input into a collimator without any previous processing. Method : Input from a whole-body scanner is stored in a matrix memory of a minicomputer. As necessary, the image of the area around the lesion is displayed on a cathode ray tube together with the input count, and the scanning counditions are also corrected as needed. Results : By this method, scanning can be performed under optimal conditions because no restrictions are imposed on them, and changes in disease condition can be evaluated quantitatively since disease activity is expressed in terms of count.
公益社団法人日本放射線技術学会の論文
1976-11-01