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首页> 外文期刊>Computer Methods and Programs in Biomedicine: An International Journal Devoted to the Development, Implementation and Exchange of Computing Methodology and Software Systems in Biomedical Research and Medical Practice >Transformation of videocapsule images to detect small bowel mucosal differences in celiac versus control patients
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Transformation of videocapsule images to detect small bowel mucosal differences in celiac versus control patients

机译：转换视频胶囊图像以检测腹腔与对照组患者的肠粘膜小差异

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摘要

Background: Videocapsule endoscopy can be useful to detect small intestinal pathology in celiac disease patients. However, presence of extraneous features including air bubbles and opaque fluids can complicate the analysis. A technique for quantitative analysis of videocapsule images is presented that is robust to presence of extraneous features. Method: Videocapsule clips were acquired from five small intestinal locations in 12 celiacs with villous atrophy and 11 control patients. Clips were 200 frames in length, their resolution was 576×576 pixels and 256 grayscale levels, with 2/s frame rate. The dominant period (DP), defined as the tallest peak in the ensemble average power spectrum, was computed over each clip without removal of extraneous features. Ensemble average basis images were constructed, and measurements were made of their frame-to-frame variation in brightness and texture. Results: From pooled basis images, celiac images had greater texture than controls and exhibited more brightness variation (p0.05 in mean and p0.01 in standard deviation). In celiacs, correlation existed between greater textural alterations versus longer DP (r 2=0.47), and between greater brightness variation and longer DP (r 2=0.33). There was no significant correlation between quantitative features and DP in controls (r 20.25). Conclusions: Using this new method, celiac videoclips were quantitatively distinguishable from control videoclips without manual or computer-assisted detection, masking, and removal of extraneous image features. Furthermore, in celiac but not control basis images, larger textural and brightness alterations were correlated to longer DP. Greater textural and brightness alterations, and thus longer periodicities, are likely related to presence of villous atrophy.
机译：背景：视频胶囊内窥镜检查可用于检测腹腔疾病患者的小肠病理。但是，外部特征（包括气泡和不透明流体）的存在会使分析复杂化。提出了一种对视频胶囊图像进行定量分析的技术，该技术对于存在无关特征是鲁棒的。方法：从十二个患有绒毛萎缩的celiacs和11个对照患者的五个小肠位置获取视频胶囊片段。剪辑的长度为200帧，分辨率为576×576像素，灰度等级为256，帧率为2 / s。在每个剪辑上计算了占主导地位的周期（DP），定义为整体平均功率谱中的最高峰，而没有去除多余的特征。构造整体平均基础图像，并对其亮度和纹理的帧间变化进行测量。结果：从合并的基础图像来看，腹腔图像比对照组具有更大的质感，并且亮度变化更大（平均值p <0.05，标准差p <0.01）。在Celiacs中，较大的纹理变化与较长的DP之间存在相关性（r 2 = 0.47），较大的亮度变化与较长的DP之间存在相关性（r 2 = 0.33）。对照的定量特征与DP之间无显着相关性（r 2 <0.25）。结论：使用这种新方法，无需人工或计算机辅助的检测，掩盖和去除多余图像特征，腹腔视频剪辑就可以与对照视频剪辑进行定量区分。此外，在腹腔但非对照基础图像中，较大的纹理和亮度变化与较长的DP相关。更大的质地和亮度变化，从而更长的周期性，可能与绒毛萎缩的存在有关。

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