首页> 美国卫生研究院文献>In Vivo >Residual Set Up Errors of the Surrogate-guided Registration Using Four-dimensional CT Images and Breath Holding Ones in Respiratory Gated Radiotherapy for Liver Cancer
【2h】

Residual Set Up Errors of the Surrogate-guided Registration Using Four-dimensional CT Images and Breath Holding Ones in Respiratory Gated Radiotherapy for Liver Cancer

机译:使用四维CT图像和呼吸在呼吸门放射治疗中使用四维CT图像和呼吸持有肝癌的剩余设定错误

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Background/Aim: To evaluate the surrogate-guided registration accuracy of two computed tomography (CT) image sets, expiratory phase four-dimensional (Ex4D) CT and breath-holding CT (BHCT), in respiratory-gated radiotherapy for liver cancer. Materials and Methods: The surrogate-guided registration errors were defined as the differences between the diaphragm- and fiducial-guided registrations or the differences between upper and lower fiducial registrations in three directions: left–right (LR), anterior–posterior (AP), and cranio–caudal (CC). Results: The mean±SDs of the absolute errors for diaphragm-guided registration were 1.9±1.3, 2.7±1.8, and 2.6±1.7 mm with Ex4D and 1.8±1.8, 2.6±1.9, and 1.8±1.7 mm with BHCT in the LR, AP and CC directions, respectively (CC direction, p<0.01). In the fiducial-guided registration, there were no significant differences in any direction. In registration with Ex4D, there were positive correlations between registration errors and the respiratory irregularity during 4D scanning (correlation coefficient; diaphragm: 0.65, fiducial: 0.54). Conclusion: BHCT has the advantage of accurate surrogate-guided registration compared with Ex4D.
机译:背景/目的:为了评估两种计算机断层扫描(CT)图像集替代引导配准精度,呼气相四维(Ex4D)CT和屏气CT(BHCT),呼吸门控放疗肝癌。材料和方法:该替代引导配准误差被定义为diaphragm-和基准引导注册或在三个方向上,下基准登记之间的差之间的差异:左右(LR),前后(AP)和头尾(CC)。结果:膜片引导注册的绝对误差的平均值±SDS分别为1.9±1.3,2.7±1.8和2.6±1.7毫米,Ex4D和1.8±1.8,2.6±1.9,而在LR 1.8±1.7毫米,BHCT ,AP和CC方向,分别为(CC方向,p <0.01)。在基准引导登记,有在任何方向上没有显著差异。与Ex4D登记,有配准误差和4D扫描期间呼吸不规则之间的正相关关系(相关系数;隔膜:0.54:0.65,基准)。结论:BHCT具有Ex4D相比准确替代引导注册的优点。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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