The Application Value of Two Implantation Techniques with CT Guidance in Brachytherapy of Cervical Cancer
Objective To explore the application value of two implantation techniques with CT guidance in brachytherapy for cervical cancer.Methods With the selection of sixty five cervical cancer patients who received brachytherapy in hospitals from January to December 2023 as the research subjects,they were divided into the template guidance group(31 cases)and the manual implantation group(34 cases),according to different implantation methods.With the use of 3D printed template to assist in guiding implantation in the template guidance group,and manual implantation in the manual implantation group,the high-risk clinical target volume(HR-CTV),90%and 98%volume of HR-CTV irradiated doses D90%and D98%,conformity index(CI)of HR-CTV,and 0.1%,1%,and 2%volume of important organs at risk(OARs,including bladder,rectum,and sigmoid colon)irradiated doses D0.1%、D1%、D2%were compared between the two groups.Results The HR-CTV volume of the template guidance group was(54.9±26.9)cm3,which was smaller than that of the manual implantation group(69.9±44.8)cm3,and the difference was statistically significant(P<0.05);The D90%and D98%of HR-CTV in the template guidance group were(6.02±0.65)Gy and(5.14±0.37)Gy,respectively,which were lower than those in the manual implantation group(6.20±0.76)Gy and(5.26±0.54)Gy,and the differences were statistically significant(P<0.05);The CI of HR-CTV in the template guidance group was(0.81±0.04),which was higher than that in the manual implantation group(0.76±0.06),and the difference was statistically significant(P<0.05);The D0.1%,D1%,and D2%for the bladder and rectum in the template guidance group were lower than those in the manual implantation group,and the differences were statistically significant(P<0.05);There was no statistically significant difference in the D0.1%,D1%,and D2%for the sigmoid colon between the two groups(P>0.05).Conclusion Compared with manual implantation,the use of 3D-printed template to assist in guiding implantation can optimize the three-dimensional conformity of the target area in patients undergoing brachytherapy for cervical cancer,and reduce the radiation dose of important OARs.
3D printed template to assist in guiding implantationManual implantationCervical cancerBrachytherapy