首页> 外文会议>Conference on imaging processing >Interactive and Scale Invariant Segmentation of the Rectum/Sigmoid via User-Defined Templates
【24h】

Interactive and Scale Invariant Segmentation of the Rectum/Sigmoid via User-Defined Templates

机译:通过用户定义的模板对直肠/乙状结肠进行交互式和尺度不变分割

获取原文

摘要

Among all types of cancer, gynecological malignancies belong to the 4th most frequent type of cancer among women. Besides chemotherapy and external beam radiation, brachytherapy is the standard procedure for the treatment of these malignancies. In the progress of treatment planning, localization of the tumor as the target volume and adjacent organs of risks by segmentation is crucial to accomplish an optimal radiation distribution to the tumor while simultaneously preserving healthy tissue. Segmentation is performed manually and represents a time-consuming task in clinical daily routine. This study focuses on the segmentation of the rectum/sigmoid colon as an Organ-At-Risk in gynecological brachytherapy. The proposed segmentation method uses an interactive, graph-based segmentation scheme with a user-defined template. The scheme creates a directed two dimensional graph, followed by the minimal cost closed set computation on the graph, resulting in an outlining of the rectum. The graphs outline is dynamically adapted to the last calculated cut. Evaluation was performed by comparing manual segmentations of the rectum/sigmoid colon to results achieved with the proposed method. The comparison of the algorithmic to manual results yielded to a Dice Similarity Coefficient value of 83.85±4.08%, in comparison to 83.97±8.08% for the comparison of two manual segmentations of the same physician. Utilizing the proposed methodology resulted in a median time of 128 seconds per dataset, compared to 300 seconds needed for pure manual segmentation.
机译:在所有类型的癌症中,妇科恶性肿瘤是女性中第四大最常见的癌症类型。除了化学疗法和外部束辐射外,近距离放射疗法是治疗这些恶性肿瘤的标准程序。在治疗计划的进展中,通过分割将肿瘤定位为目标体积和邻近的风险器官对于实现对肿瘤的最佳放射线分布,同时保留健康的组织至关重要。分割是手动执行的,在临床日常工作中代表着一项耗时的工作。这项研究的重点是在妇科近距离放射治疗中,作为风险器官的直肠/乙状结肠的分割。所提出的分割方法将交互式,基于图的分割方案与用户定义的模板一起使用。该方案创建一个有向二维图,然后在该图上进行最小成本封闭集计算,从而概述了直肠。图形轮廓将动态地适应上一次计算的切割。通过将直肠/乙状结肠的手动分割与通过所提出的方法获得的结果进行比较来进行评估。算法结果与人工结果的比较得出骰子相似性系数值为83.85±4.08%,而同一位医生的两次人工分割的比较结果为83.97±8.08%。使用建议的方法,每个数据集的中值时间为128秒,而纯手动分段则需要300秒。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号