[1]许新明,张 超,王 陶,等.基于CBCT的宫颈癌放疗摆位误差及不同配准方式分析[J].医学信息,2021,34(11):101-104.[doi:10.3969/j.issn.1006-1959.2021.11.027]
　XU Xin-ming,ZHANG Chao,WANG Tao,et al.Analysis of Setup Error and Different Registration Methods for Cervical Cancer Radiotherapy Based on CBCT[J].Medical Information,2021,34(11):101-104.[doi:10.3969/j.issn.1006-1959.2021.11.027]
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基于CBCT的宫颈癌放疗摆位误差及不同配准方式分析()
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医学信息[ISSN:1006-1959/CN:61-1278/R]

卷:
34卷
期数:
2021年11期
页码:
101-104
栏目:
论著
出版日期:
2021-06-01

文章信息/Info

Title:
Analysis of Setup Error and Different Registration Methods for Cervical Cancer Radiotherapy Based on CBCT
文章编号:
1006-1959（2021）11-0101-04
作者:
许新明; 张 超; 王 陶; 等
（沧州市人民医院放疗中心，河北 沧州 061000）
Author(s):
XU Xin-ming; ZHANG Chao; WANG Tao; et al.
(Radiotherapy Center,Cangzhou People’s Hospital,Cangzhou 061000,Hebei,China)
关键词:
宫颈癌; 锥形束CT; 摆位误差; 图像配准
Keywords:
Cervical cancer; Cone-beam CT; Setup error; Image registration
分类号:
R737.33
DOI:
10.3969/j.issn.1006-1959.2021.11.027
文献标志码:
A
摘要:
目的 利用锥形束CT（CBCT）测量6维治疗床不同轴向的摆位误差，分析采用骨性配准与灰度配准时测得摆位误差的差异。方法 选取2019年4月~12月于沧州市人民医院放疗中心行放射治疗的宫颈癌术后患者13例为研究对象，所有患者常规摆位后治疗前行CBCT扫描，获取CBCT图像与定位CT图像分别进行配准，得出摆位误差，比较不同配准方式及轴向摆位误差的差异。结果 所有患者共行CBCT扫描64次，骨性配准时x、y、z轴平移误差分别为（0.25±0.17）cm、（0.64±0.46）cm、（0.15±0.15）cm，Rx、Ry、Rz轴旋转误差分别为（1.17±1.19）°、（0.89±0.76）°、（1.20±1.02）°；灰度配准时x、y、z轴平移误差分别为（0.17±0.11）cm、（0.35±0.31）cm、（0.20±0.13）cm，Rx、Ry、Rz轴旋转误差分别为（0.78±0.78）°、（0.59±0.33）°、（0.82±0.76）°；在x、y、z轴及Rx、Ry、Rz轴上骨性配准与灰度配准比较，差异有统计学意义（P＜0.05）。结论 宫颈癌术后放疗摆位误差相对较大，采用IGRT技术可有效纠正摆位误差，提高放疗精度及治疗效果，建议采用骨性配准方法，以期获得更为准确的摆位误差。
Abstract:
Objective To use cone-beam CT (CBCT) to measure the setup errors of the 6-dimensional treatment bed in different axes, and to analyze the difference between the setup errors measured when using bony registration and gray-scale registration.Methods A total of 13 postoperative cervical cancer patients who underwent radiotherapy at the Radiotherapy Center of Cangzhou People’s Hospital from April 2019 to December 2019 were selected as the research objects.All patients underwent CBCT scan before treatment after routine positioning. The acquired CBCT image and the positioning CT image were registered separately to obtain the setup error, and compare the differences of different registration methods and axial setup errors.Results A total of 64 CBCT scans were performed for all patients. The translation errors of x, y, and z axes during bony registration were (0.25±0.17) cm, (0.64±0.46) cm, (0.15±0.15) cm, Rx, Ry, Rz, respectively. The axis rotation errors were (1.17±1.19)°, (0.89±0.76)°, (1.20±1.02)°;The translation errors of x, y and z axes during gray-scale registration were (0.17±0.11) cm, (0.35±0.31) cm, (0.20±0.13) cm, and the rotation errors of Rx, Ry, and Rz axes were respectively (0.78±0.78) °, (0.59±0.33)°, (0.82±0.76)°;There was a statistically significant difference between bony registration and gray-scale registration on the x, y, z axis and Rx, Ry, Rz axis (P＜0.05).Conclusion The setup error of postoperative radiotherapy for cervical cancer is relatively large. The use of IGRT technology can effectively correct the setup error and improve the accuracy and treatment effect of radiotherapy. It is recommended to use the bone registration method to obtain more accurate setup error.

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更新日期/Last Update: 1900-01-01