電気学会論文誌C(電子・情報・システム部門誌)
Online ISSN : 1348-8155
Print ISSN : 0385-4221
ISSN-L : 0385-4221
<医用画像処理>
MRI画像における位相・輝度空間分布特性を用いた領域抽出法
加藤 陽子姫野 龍太郎
著者情報
キーワード: MRI, 輝度値, 位相, 分布, 生体組織, 形状
ジャーナル フリー

2007 年 127 巻 10 号 p. 1719-1725

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Understanding the shape of an organ is important because it is representative of the condition of an organ in case of diseases affecting it. The intensity and the phase distribution in MRI image are influenced by the system and the object. The influences in the distribution could be changed by the type of the organ. In this paper, we discuss a method that was developed to evaluate the shape of organs in MR images based on the anisotropy in the intensity or phase distribution. First, the entire intensity range or the phase is divided into intervals. The bounding rectangle for the particle, comprising neighboring points in each divided range, is used to recognize the object based on the elongation direction of the rectangle. This method can be applied to images obtained by phase-contrast, gradient-echo, and spin-echo methods. All the results demonstrate the efficiency of this method in recognizing the outline of the object. Moreover, the distribution anisotropy in the object differed from that in its outside. The result would make the method better.

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© 電気学会 2007
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