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Clinical registration between CT and MRI of nasopharyngeal carcinoma
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF RADIATION ONCOLOGY
- Issue:
- 2
- DOI:
- 10.3760/j.issn:1004-4221.2006.02.004
- Key Word:
- 鼻咽肿瘤;图像处理,计算机辅助;评价研究
Abstract： 目的探讨鼻咽癌CT/MRI的临床配准方法并评价配准效果.方法8例未经治疗的鼻咽癌患者采用相同放疗体位和面罩固定方法,CT、MRI扫描后全部图像经网络传输至AcQSIM4.9.2及Pinnacle3()V7.0工作站,分别由两名医师和一名物理师在AcQSIM 4.9.2采用点标记法、交互法及在Pinnacle3()V7.0上采用归一化互信息法来配准.采用盲法由两名医师分别在不同工作站上目测评价,评价配准结果采用四点法:极差、差、良、很好;评价配准时间采用三点法:短时(＜1 min)、长时(1～3 min)、很长＞ 3 min).结果归一化互信息法较交互法、点标记法更为准确,配准速度最快.医生组较物理师配准更为准确,速度快,其中点标记法医生组较物理师配准更为准确,速度快,而归一化互信息法和交互法医生组与物理师配准准确性及速度相当.结论归一化互信息法在速度和Robust上占优势,因由软件自动配准、人为因素影响较小故适合放疗计划配准应用.
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