Automatic Registration between Portal Images and Reference Images in Radiotherapy
- VernacularTitle:一种射野图像和参考图像的自动配准方法
- Author:
Yaqin ZHENG
;
Xin TIAN
- Publication Type:Journal Article
- Keywords:
radiotherapy;
portal image;
reference image;
set-up errors;
registration
- From:
Chinese Journal of Medical Physics
2009;26(6):1481-1484
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To correct the set-up error of patients during radiotherapy is very important for increasing treatment effective. Methods: This paper proposes a registration method based on portal images and reference images. Canny Operator was used to extract edge features. The extracted edge features were set as datum mark to calculate the maximal mutual information between the portal images and reference images. Parameters were optimized with simplex-simulated annealing optimization strategy. Results: The portal images and reference images of 29 patients with the cervix cancer and prostatic carcinoma were registrated in this paper. The results showed that the registration was precise, and the registration speed was increased remarkably. Conclusion: So this registration method can be applied for online estimation for set-up errors in clinical radiation.
