颈托联合真空垫在射波刀颈椎转移灶体位固定中的应用分析

目的探讨颈托联合真空垫个性化体位固定在射波刀颈椎转移灶体位固定中的临床应用价值。方法以放射治疗部位为颈椎为标准, 选取拟行射波刀立体定向放射治疗颈椎转移灶的患者68例。男性41例, 女性27例, 年龄43～78岁, 平均年龄51.5岁。按随机数字表法分为3组, A组患者采用颈托联合真空垫个性化体位固定, B组采用真空垫体位固定, C组采用小头模固定。首次治疗完成后询问患者治疗过程中固定模具的舒适度。完成放疗后, 收集并分析3种固定技术平移和旋转方向的平均偏移量、最小公差距离(dxAB)、最小旋转偏差角度(drAB)、错误节点比例(false nodes)以及舒适度。结果 3组患者首次治疗过程中位置偏差在头尾(inf_sup)、左右(left_right)、腹背(ant_post)、俯仰(pitch)、横滚(roll)、平旋(yaw)方向上比较, 差异有统计学意义(F=7.13、2.56、3.41、4.21、2.71、8.14, P<0.05)。与B组和C组比较, A组的dxAB, drAB和false nodes数据明显...

The application value of a cervical collar combined with a vacuum pad in the positioning of Cyberknife radiosurgery for cervical spine metastases

Objective To explore the clinical application value of personalized positioning using a cervical collar combined with a vacuum pad in the Cyberknife radiosurgery for cervical spine metastases.Methods This study enrolled 68 patients with cervical spine metastases to be treated with Cyberknife stereotactic radiotherapy for cervical spines. These patients consisted of 41 males and 27 females, aged from 43 to 78 years (average:51.5 years). They were divided into groups A, B, and C using the random number table method. The patient positioning in these groups was achieved using a cervical collar combined with a vacuum pad (personalized positioning), a vacuum pad, and a small head mold, respectively. After the first treatment, the comfort levels of the positioning molds during treatment were investigated. After radiotherapy, the average deviations in translational and rotational directions, the minimum tolerance distance (dxAB), the minimum rotational deviation angle (drAB), the proportion of false nodes, and the comfort level of the three positioning method were acquired for analysis.Results The three groups showed statistically significant differences in the inf-sup, left-right, ant-post, pitch, roll, and yaw directions during the first treatment (F=7.13, 2.56, 3.41, 4.21, 2.71, 8.14, P < 0.05). Compared with groups B and C, Group A had significantly lower dxAB, drAB, and the proportion of false nodes, showing statistically significant differences (F=5.06, 4.31, 3.30, P < 0.05). Furthermore, patients in groups A and B felt more comfortable with the positioning molds than those in Group C (χ²=12.46, P < 0.05), with no statistically significant differences between groups A and B (P > 0.05).Conclusions For patients with cervical spine metastases undergoing Cyberknife radiosurgery for cervical spines, the personalized positioning using a cervical collar combined with a vacuum pad can improve the accuracy and safety of Cyberknife spinal tracking while remaining the comfort level.