医用画像情報学会雑誌
Online ISSN : 1880-4977
Print ISSN : 0910-1543
ISSN-L : 0910-1543
原著論文
Wavelet係数変換法を用いた医用画像の強調効果の比較評価
松山 江里李 鎔範高橋 規之蔡 篤儀
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2016 年 33 巻 3 号 p. 63-68

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The purpose of this study is to investigate and compare the effectiveness of two previously proposed waveletbased medical image enhancement methods, i.e., exponential-type (E-type) and sigmoid-type (S-type) mapping methods. A total of 30 chest radiographs, CT images and mammograms were evaluated visually by using Scheffe's method for paired comparison. As a visual evaluation, images obtained with and without enhancement processing, or images processed with the two enhancement methods were displayed side by side on a light emitting diode monitor. Two different images, i.e.,original image vs. image processed with E-type mapping method, original image vs. image processed with S-type mapping method, and image processed with E-type mapping method vs. that with S-type mapping method, were then evaluated on a discrete rating scale. The experimental results showed that the images processed with S-type mapping method are significantly better than the original images obtained with the three different modalities in both the visual and quantitative evaluations. In addition, the images processed with E-type mapping method are significantly better than the original images of chest radiographs in both the evaluations. The results demonstrate that the previously proposed image enhancement methods are effective and feasible.

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© 2016 医用画像情報学会
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