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[目的]结合胃造影动态摄影,分析不同个体及不同胃型胃的各向移动度差异,探讨在放疗中胃作为危及器官(OAR)勾画时,利用胃造影动态摄影实现更准确扩边的可行性。[方法]对福建省肿瘤医院行调强放射治疗的中上腹部肿瘤病例32例,行胃造影动态摄影,并将胃分为钩型、角型、长胃型,测定自由呼吸状态下胃各向边界移动度,了解个体间的差异性,以及不同胃型对其影响;比较在调强放疗中所勾画胃的体积与结合胃造影数值的计划危及器官体积(PRV)间差异。[结果]所有患者胃边界移动度以头脚方向最大,且上界移动度大于下界,分别约11.0±4.9mm、6.8±5.1mm,左右方向移动度最小,约2.1±1.8mm;不同胃型的胃边界移动度差异显著(P<0.05),钩型胃移动度较大,上下界分别约12.8±4.8mm、8.1±4.6mm,长胃型较小,分别约7.2±5.9mm、4.3±1.5mm;左右及前后方向移动度多数不超过5mm。[结论]利用胃造影动态摄影可获取较准确的胃各向移动度值,有助于调强放射治疗中提高胃计划危及器官体积勾画的精确度。
[Objective] To analyze the difference of the degree of movement in different individuals and different types of gastric stomach in combination with dynamic contrast-enhanced gastroscopy, and to explore the feasibility of using gastric contrast dynamic photography to achieve more accurate enlargement of the edge of the stomach as an organ at risk (OAR) during radiotherapy Sex. [Method] Forty-two cases of mid-upper abdominal tumor with intensity-modulated radiation therapy in Fujian Tumor Hospital underwent dynamic imaging of gastric angiography. The stomach was divided into hook type, angle type and long stomach type. To understand the differences among individuals and their effects on different gastric types, we compared the differences between the volumes of organs marked by stomach radiotherapy and those planned by gastroscopy. [Results] All patients had maximum gastric motility in the direction of head and foot, and the upper bound was greater than the lower bound (about 11.0 ± 4.9mm and 6.8 ± 5.1mm respectively) (P <0.05). The hook-type gastric motility was relatively large with upper and lower bounds of 12.8 ± 4.8mm and 8.1 ± 4.6mm respectively. 1.5mm; left and right and the direction of the majority of the mobile no more than 5mm. [Conclusion] The dynamic imaging of gastric angiography can get more accurate value of the degree of gastric mobility, which is helpful to improve the accuracy of the outline of organ volume planted by gastric plan in IMRT.