医用画像情報学会雑誌
Online ISSN : 1880-4977
Print ISSN : 0910-1543
ISSN-L : 0910-1543
研究速報
ダイナミック乳腺MR画像における腫瘍範囲の自動解析に関する基礎的検討-正常乳腺および後期相の信号値上昇を考慮した浸潤範囲の同定-
宮條 さとみ寺本 篤司山室 修大見 久美子西尾 正美藤田 広志
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2015 年 32 巻 4 号 p. lxi-lxiv

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In order to select the appropriate form of surgery, exact analysis of the invasive region of the tumour using breast MR images has become an important role in the diagnosis. However, many images are obtained for the identification of the tumour; the diagnostic ability of the physician may be decreased. The main purpose of this study was to propose a novel method for automated analysis of the region of the tumour using dynamic contrast‐enhanced breast MR images. For this method, T1‐weighted MR images of pre‐, early‐, and post‐contrast enhanced breast MR images were introduced. Early‐ and late‐subtraction images were obtained by subtracting early‐ and late‐contrast‐enhanced images, respectively, from the pre‐contrast ones. And then, tumor enhanced images were obtained using subtraction images. Subsequently, using the level‐set method, which was a type of dynamic contour extraction, the outline of the tumour in the tumour‐extracted images was obtained. We compared the tumour size listed in the interpretation report by a physician and analysed the results obtained from the proposed method. The mean absolute error of the size of tumours in all cases was less than 3.0 mm. These results indicate than propose method may be useful for the analysis of breast tumors.

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© 2015 医用画像情報学会
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