Clinical application of new type individualized fixation device for radiotherapy of rectal cancer
10.3760/cma.j.issn.1008-6706.2019.01.002
- VernacularTitle:新型直肠癌放疗个体化固定装置的临床应用
- Author:
Guofu CHEN
1
;
Guiming YAN
;
Feiyan ZHANG
Author Information
1. 浙江省肿瘤医院放射物理室
- Keywords:
Rectal neoplasms;
Radiotherapy,conformal;
Tomography,X-ray computed;
Posture;
Radiation injuries;
Fixing device;
Plastics;
Phantoms,imaging
- From:
Chinese Journal of Primary Medicine and Pharmacy
2019;26(1):2-5
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the clinical effect of new type rectal cancer radiotherapy individualized fixation device in the radiotherapy of rectal cancer. Methods From June 2015 to December 2016,60 patients with rectal cancer who accepted the external irradiation in Zhejiang Tumor Hospital were divided into two groups by random number table method. A group(31 cases) received new type rectal cancer radiotherapy position fixation devices with thermoplastic film. B group(29 cases) received simple foam pad with thermoplastic film. Before each treatment,Cone beam CT(CBCT) scan was conducted. The applied CBCT image and the planned reconstruction image were compared in the direction of X(left and right),Y(upper and lower)and Z(front and rear) axis. The setup error was recorded, and the correlation between the two groups was analyzed. Results The average setup error of patients in A group in X (left and right),Y(upper and lower),Z(front and rear) axis were (1. 61 ± 0. 18)mm,(1. 82 ± 0. 13)mm,(1. 91 ± 0. 11)mm,respectively. The average setup error of patients in B group in X(left and right),Y(upper and lower),Z (front and rear) axis were (2. 22 ± 0. 13)mm,(2. 43 ± 0. 14)mm,(2. 36 ± 0. 13)mm,respectively. There were statistically significant differences between the two groups(t=14. 958,17. 501,11. 283,all P＜0. 001). Conclusion The new type of rectal cancer radiotherapy position fixing device is more comfortable than the simple foam pad,and the setting error is smaller than the simple foam pad.
