肝シンチグラムの自動特徴抽出に関する研究

概要

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Liver scintigraphy with <99m>^Tc-Sn colloid is an important tool in the differential diagnosis of diffuse liver dieases. Because it requires manual measurement and visual inspection, however, the accuracy of the diagnosis inevitably lies in the skill of the physician. As a step to automated computerized pattern characterization of liver sicntigrams, two methods, the rectangular characterization and circular characterization methods were used to extract characteristics in the right lateral view of the liver scintigram. Rectangular characterization was superior to circular characterization in making a differential diagnosis of diffuse liver diseases. Patterns of circular characterization were in accordance with existing information on right lateral views of liver scintigrams for diffuse liver diseases. The elliptical approximation method was used to extract characters of the anterior and posterior views. These characterization methods were subjected to multiple discriminant analysis to test their valuability in the differential diagnosis of diffuse liver diseases. The accuracy rate was 78.3% for the test groups suggesting that automated computerized characterization of liver scintigraphy may be possible.
神戸大学の論文