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Anisotropic diffusion filtering of computed tomography images and improving diagnosis of stroke.

机译:计算机断层扫描图像的各向异性扩散过滤和改善中风的诊断。

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摘要

Stroke is a devastating neurological event and one of the leading causes of death and disability. Rapid diagnosis and treatment ensure the best outcome for afflicted patients. The Alberta Stroke Program Early Computed Tomography Score (ASPECTS) was developed to assess the extent of damage in ischemic stroke. Despite extensive training, significant operator variability exists in scoring. The anisotropic diffusion filter is a noise-reducing filter that preserves edges and fine detail information. Acceleration of the algorithm with specialized hardware yielded algorithmic speed-ups of up to 50 times. The anisotropic diffusion filter was also applied retrospectively to acutely acquired, noncontrast computed tomography scans to reduce operator variability for ASPECTS. It was shown that within-reader variability in scoring was significantly reduced without affecting between-reader variability or accuracy of scoring. These results are significant as they shown that off-the-shelf graphics hardware can be used for image processing to improve clinical diagnosis of acute stroke.
机译:中风是毁灭性的神经系统事件,是死亡和残疾的主要原因之一。快速诊断和治疗可确保为患病患者提供最佳结果。艾伯塔省卒中计划早期计算机断层扫描评分(ASPECTS)用于评估缺血性卒中的损害程度。尽管进行了广泛的培训,但评分中仍存在明显的操作员变异性。各向异性扩散滤波器是一种降噪滤波器,可保留边缘和精细的细节信息。利用专用硬件对该算法进行加速,可使算法的速度提高多达50倍。各向异性扩散滤镜也追溯应用到急性获取的,非对比计算机断层扫描中,以减少ASPECTS的操作者变异性。结果表明,在不影响阅读者之间的变异性或评分准确性的情况下,阅读者内部评分的变异性显着降低。这些结果非常重要,因为他们表明现成的图形硬件可用于图像处理以改善急性中风的临床诊断。

著录项

  • 作者

    Hargreaves, Jaret J.;

  • 作者单位

    University of Calgary (Canada).;

  • 授予单位 University of Calgary (Canada).;
  • 学科 Engineering Biomedical.;Computer Science.;Health Sciences Radiology.
  • 学位 M.Sc.
  • 年度 2008
  • 页码 100 p.
  • 总页数 100
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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