頭部ＭＲＩ画像の知識に基づく自動セグメンテーションと３次元表示

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  • Automatic segmentation and 3-dimensional display based on the knowledge of head MRI images.
  • トウブ MRI ガゾウ ノ チシキ ニ キズク ジドウ セグメンテーション ト

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In this paper we present a procedure which automatically extracts soft tissues, such as subcutaneous fat, brain, and cerebral ventricle, from the multislice MRI images of head region, and displays their 3-dimensional images.<br>Segmentation of soft tissues is done by use of an iterative thresholding. In order to select the optimum threshold value automatically, we introduce a measure to evaluate the goodness of segmentation into this procedure. When the measure satisfies given conditions, iteration of thresholding terminates, and the final result of segmentation is extracted by using the current threshold value.<br>Since this procedure can execute segmentation and calculation of the goodness measure in each slice automatically, it remarkably decreases efforts of users. Moreover, the 3-dimensional display of the segmented tissues shows that this procedure can extract the shape of each soft tissue with reasonable precision for clinical use.

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