Effects of X-ray volume imaging registration methods on position verification for radiotherapy in treatment of middle/lower-segment esophageal cancer
10.13491/j.issn.1004-714X.2023.01.011
- VernacularTitle:X射线容积成像系统配准方式对中下段食管癌放疗体位验证的影响
- Author:
Haojia LIU
1
;
Huitao WANG
2
;
Hongwei XU
1
;
Anping ZHENG
2
;
Xiaodong SUN
2
;
Jinfeng ZHU
2
Author Information
1. The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou 450000 China.
2. Anyang Tumor Hospital, Anyang 455000 China.
- Publication Type:Journal Article
- Keywords:
X-ray volume imaging;
Image registration;
Radiotherapy;
Middle/lower-segment esophageal cancer
- From:
Chinese Journal of Radiological Health
2023;32(1):52-57
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare the set up errors derived from different registration methods of the X-ray volume imaging (XVI) system for radiotherapy in the treatment of middle/lower-segment esophageal cancer, and to provide a reference for radiation treatment of esophageal cancer. Methods We randomly selected 63 patients with middle/lower-segment esophageal cancer, and obtained their reconstructed XVI images at the first therapy to perform automatic registration with gray-value and bone registration methods. We acquired and compared the three translation errors (along x [left to right], y [head to feet], and z [front to back] axes) and three rotation errors (around the x, y, and z axes) derived from the two registration methods. Results Gray-value registration had significantly smaller translation errors along the x and z axes than bone registration (x azes t = −2.78, z azes t = −2.15, P < 0.05), but there was no significant difference along the y axes (P > 0.05). The rotation errors around the three axes were all smaller than 1°, and were smaller with gray-value registration than with bone registration, but without significant differences (P > 0.05). Conclusion We recommend gray-value registration for radiotherapy in the treatment of middle/lower-segment esophageal cancer. Manual verification or fine-tuning is recommended after automatic registration in clinical practice. Besides translation errors, rotation errors should also be paid attention to.
