CAJ | 학술논문

目的：探讨宫颈癌术后患者容积调强计划设计中靶区横向宽度与最优X方向铅门大小之间的关系。方法分别对12例宫颈癌术后患者CT图像制作不同X方向铅门大小的容积调强计划，通过对同一患者的不同计划进行剂量学比较，找到其最优X方向铅门大小。最后通过不同患者靶区体积与最优铅门大小的关系，拟合关于靶区横向宽度与最优铅门大小的函数方程。结果在宫颈癌容积调强计划设计时，随着靶区横向宽度的变化，得到的最优铅门大小也随之改变。通过对不同靶区体积进行变化铅门的容积调强计划设计并比较分析，得到靶区横向宽度（x）与最优铅门大小（y）存在一定的关系，最终拟合得到函数方程： y＝-0.0033x2＋0.7132x＋3.6322。结论宫颈癌术后患者靶区横向宽度和最优铅门大小之间存在定量函数变化关系，可将其应用于临床，以指导宫颈癌术后患者容积调强计划设计。
목적：탐토궁경암술후환자용적조강계화설계중파구횡향관도여최우X방향연문대소지간적관계。방법분별대12례궁경암술후환자CT도상제작불동X방향연문대소적용적조강계화，통과대동일환자적불동계화진행제량학비교，조도기최우X방향연문대소。최후통과불동환자파구체적여최우연문대소적관계，의합관우파구횡향관도여최우연문대소적함수방정。결과재궁경암용적조강계화설계시，수착파구횡향관도적변화，득도적최우연문대소야수지개변。통과대불동파구체적진행변화연문적용적조강계화설계병비교분석，득도파구횡향관도（x）여최우연문대소（y）존재일정적관계，최종의합득도함수방정： y＝-0.0033x2＋0.7132x＋3.6322。결론궁경암술후환자파구횡향관도화최우연문대소지간존재정량함수변화관계，가장기응용우림상，이지도궁경암술후환자용적조강계화설계。
Objective To summarize the relationship between the transverse dimension of the target volume and the most optimized X jaw size in volumetric modulated arc therapy ( VMAT) plan for cervical cancer radiother-apy.Methods The VMAT plans were made by modifying X jaw size on CT images in 12 postoperative patients with cervical cancer .On each image , the best X jaw size was identified .The relationship between the best X jaw size and the transverse width of planning target volume ( PTV) was determined .Results The change in the trans-verse dimension of the target volume was accompanied with the changes of the optimized X jaw size .The relation-ship between X jaw size (y) and the PTV's transverse width (x) could be expressed as the following equation: y=-0.0033x2 +0.7132x+3.6322.Conclusions There is a relationship between X jaw size and PTV's transverse width, which can be used for the postoperative VMAT plan design in patients with cervical cancer .