内耳のコンピュータ三次元再構築　その形態と計測について

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  • Computer-aided 3-D reconstruction of the inner ear and its measurement.
  • ナイジ ノ コンピュータ 3ジゲン サイ コウチク ソノ ケイタイ ト ケイソ
  • ―その形態と計測について―

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The advantages of the computer-aided three-dimensional (3-D) reconstruction of the inner ear structures are as follows, <br>1) 3-D visualization of the shapes of those structures from histologic sections, <br>2) ability to measure the fine structures of the inner ear from 3-D images. To study the inner ear structures, it is necessary to make histological sections for examination under the microscope. Such processing, however, destroys the spatial relationships of inner ear structures that are very important for the evaluation of inner ear function. Furthermore, the quantitative measurement of those structures is not possible from histological sections because the appearance of the two dimensional structures in those sections varies considerably according to cutting angle. The computer-aided 3-D reconstruction method is necessary for the quantitative studies of the temporal bone.<br>In this paper, the necessity of this method is discussed, and the technique of 3-D reconstruction is described. Some representative examples are presented, and the problems and prospects are discussed.

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