2.各種ファントムの比較 : 性能評価委員会勧告と対比して(II.CT装置の性能管理について)

概要

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The evaluation standard of CT capacity was recommended in 1978 for the unification of performance evaluation method for CT scanner. In this paper methods using different type of phantoms are evaluated under the recomended standard. 1. The data taken from different phantom is not useful to compair CT capacity because there is few things in common between various types phtantoms and recommended standard. However, using phantoms provides useful approaches for routine maintenance and control of CT. 2. There are some big differences in the reported modulation transfer function curve. These are supposed to be due to the difference of measuring methods and processing data, in practical measuring there is no big difference, it requires careful consideration of measures. 3. The aluminum slope method for slice thickness measurment makes error bigger by using thin slices data from different phantom show diviation so that it requires farther investigation. 4. The recommended standard phantom has a simple structure except some articles which needs accuracy, also it is easy to assemble a recommended standard phantom and it satisfies purposes.
公益社団法人日本放射線技術学会の論文
1982-09-01