劉建超 陳杰 閔小川
摘要:目的? 分析胸部腫瘤放射治療中不同體位固定技術(shù)的擺位誤差。方法? 選取天津醫(yī)科大學總醫(yī)院放療科2018年2月~2019年3月收治的72例胸部腫瘤患者,隨機分為三組,每組24例。A組采用真空負壓墊固定,B組采用熱塑體膜固定,C組采用真空負壓墊+熱塑體膜固定。三組患者均使用CT模擬定位機定位,治療前使用千伏級錐形束CT(CBCT)系統(tǒng)測量并計算出兩射野中心點在左右(X)、頭腳(Y)、前后(Z)方向的重復擺位誤差并比較。結(jié)果? A、B、C三組在X軸方向的誤差分別為(2.71±2.44)mm,(2.46±1.44)mm,(1.72±1.01)mm;在Y軸方向的誤差分別為(3.89±3.04)mm,(3.68±1.93)mm,(2.01±1.20)mm;在Z軸方向的誤差分別為(3.21±1.99)mm,(2.20±1.37)mm,(2.29±1.04)mm。A組與B組在X軸、Y軸方向上的比較,差異無統(tǒng)計意義(P>0.05),在Z軸方向上的比較,差異有統(tǒng)計意義(P<0.05)。C組與A組在X軸、Y軸、Z軸方向上的比較,差異有統(tǒng)計學意義(P<0.05);C組與B組在X軸、Y軸方向上的比較,差異有統(tǒng)計意義(P<0.05),在Z軸方向的比較,差異無統(tǒng)計學意義(P>0.05)。結(jié)論? 對三種體位固定方法進行兩兩分析比較,最終得出體位固定技術(shù)中真空負壓墊+熱塑體膜固定方法的誤差最小,應優(yōu)先選擇。但該方法操作復雜,耗時較多,性價比低,應根據(jù)患者實際情況選擇合適的固定方法。
關鍵詞:胸部腫瘤;放射治療;熱塑體膜;真空負壓墊;體位固定技術(shù);擺位誤差
中圖分類號:R730.5? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?文獻標識碼:A? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?DOI:10.3969/j.issn.1006-1959.2020.02.025
文章編號:1006-1959(2020)02-0094-03
Abstract:Objective? To analyze the positioning errors of different body fixation techniques in the radiotherapy of chest tumors. Methods? 72 patients with chest tumors who were treated in the Department of Radiation Oncology of the General Hospital of Tianjin Medical University from February 2018 to March 2019 were randomly divided into three groups, 24 in each group. Group A was fixed with a vacuum negative pressure pad, group B was fixed with a thermoplastic film, and group C was fixed with a vacuum negative pressure pad + thermoplastic film. The three groups of patients were positioned using CT simulation positioning machines. Before treatment, a thousand-volt cone beam CT (CBCT) system was used to measure and calculate the center points of the two shooting fields at left and right (X), head and foot (Y), and front and back (Z) repeated positioning errors in the direction and compare.Results? The errors of the three groups A, B, and C in the X-axis direction are (2.71±2.44) mm, (2.46±1.44) mm, (1.72±1.01) mm; the errors in the Y-axis direction are (3.89±3.04) mm, (3.68±1.93) mm, (2.01±1.20) mm; the errors in the Z-axis direction are (3.21±1.99) mm, (2.20±1.37) mm, and(2.29±1.04) mm.There was no statistical significance in the comparison of group A and group B in the X-axis and Y-axis directions(P>0.05), and the comparison in the Z-axis direction had statistical significance(P<0.05).The difference between group C and group A in the X-axis, Y-axis, and Z-axis directions was statistically significant(P<0.05); the comparison between group C and group B in the X-axis, Y-axis directions was statistically significant(P<0.05). There was no significant difference in comparison in the Z axis direction(P>0.05).Conclusion? After comparing and comparing the three posture fixation methods, it is concluded that among the three posture fixation methods, the vacuum negative pressure pad+thermoplastic membrane fixation method has the smallest error and should be preferred. However, this method is complicated in operation, time-consuming and cost-effective, and an appropriate fixation method should be selected according to the actual situation of the patient.
本研究比較三種體位固定方式,在嚴格的質(zhì)量把控下三種方式均能起到較好的固定作用。但是,真空負壓墊固定方式由于對患者身體沒有束縛,患者不經(jīng)意的身體微小扭動以及呼吸運動的影響造成患者在前后方向的擺位誤差較大。熱塑體膜固定方式由于患者身下是一簡單平板,沒有體位記憶功能,擺位時靠患者記憶選擇舒適體位躺好,因此這種方式的重復性較差。真空負壓墊+熱塑體膜固定方式,在患者身下放置真空墊固定,保證每次治療前體位相同,身體上方使用熱塑體膜固定,減少了患者的不自主移位,還可有效控制呼吸運動的范圍。因此三種方式中真空負壓墊+熱塑體膜固定方式的固定效果最好。但是由于這種方式操作復雜,耗時較長,耗材較多,經(jīng)濟性差,而且在臨床應用中發(fā)現(xiàn)某些高齡體弱的患者在行熱塑體膜固定時會引起呼吸困難等不適癥狀,應根據(jù)實際情況如經(jīng)濟能力、身體狀況、病人意愿等選擇合適的固定方式。
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收稿日期:2019-08-23:修回日期:2019-11-05
編輯/肖婷婷