中国医疗设备
中國醫療設備
중국의료설비
CHINA MEDICAL EQUIPMENT
2013年
9期
159-161
,共3页
大孔径16排螺旋CT%模拟定位%术后放射治疗%食管癌%放疗定位
大孔徑16排螺鏇CT%模擬定位%術後放射治療%食管癌%放療定位
대공경16배라선CT%모의정위%술후방사치료%식관암%방료정위
large-aperture 16-row spiral CT%positioning simulation%post-operative radiotherapies%esophageal neoplasms%radiotherapy positioning
目的研究应用大孔径16排螺旋CT进行食管癌术后放疗模拟定位的优势及其临床价值。方法选取使用Philips PQS单排和Philips Brilliance CT Big Bore 16排螺旋CT进行模拟定位的患者各20例。患者仰卧位、双上肢上举、双手抱头，真空负压气垫固定，CT扫描后，在模拟定位工作站确定等中心，通过激光定位系统，调节激光灯并移床，做等中心体表标记。在治疗计划系统设计治疗计划，使用Varian EX 直线加速器的机载影像系统（OBI）千伏级锥形束CT（kV CBCT ）进行扫描和配准验证，对验证误差进行对比分析。结果大孔径16排螺旋CT有较高的时间分辨率、空间分辨率、密度分辨率，提高了食管癌术后放疗照射野与剂量分布的优化方案设计和防护的精确性，大孔径16排螺旋CT模拟定位的验证误差优于单排螺旋CT（t=-4.63,3.21,6.74；P＜0.05）。结论大孔径16排螺旋CT在放疗模拟定位中的应用大大提高了放疗定位的精确性，为精确计划、精确治疗提供了保证。放疗先进设备的应用可以改善食管癌术后放疗肿瘤的局部控制率和患者的生存率。
目的研究應用大孔徑16排螺鏇CT進行食管癌術後放療模擬定位的優勢及其臨床價值。方法選取使用Philips PQS單排和Philips Brilliance CT Big Bore 16排螺鏇CT進行模擬定位的患者各20例。患者仰臥位、雙上肢上舉、雙手抱頭，真空負壓氣墊固定，CT掃描後，在模擬定位工作站確定等中心，通過激光定位繫統，調節激光燈併移床，做等中心體錶標記。在治療計劃繫統設計治療計劃，使用Varian EX 直線加速器的機載影像繫統（OBI）韆伏級錐形束CT（kV CBCT ）進行掃描和配準驗證，對驗證誤差進行對比分析。結果大孔徑16排螺鏇CT有較高的時間分辨率、空間分辨率、密度分辨率，提高瞭食管癌術後放療照射野與劑量分佈的優化方案設計和防護的精確性，大孔徑16排螺鏇CT模擬定位的驗證誤差優于單排螺鏇CT（t=-4.63,3.21,6.74；P＜0.05）。結論大孔徑16排螺鏇CT在放療模擬定位中的應用大大提高瞭放療定位的精確性，為精確計劃、精確治療提供瞭保證。放療先進設備的應用可以改善食管癌術後放療腫瘤的跼部控製率和患者的生存率。
목적연구응용대공경16배라선CT진행식관암술후방료모의정위적우세급기림상개치。방법선취사용Philips PQS단배화Philips Brilliance CT Big Bore 16배라선CT진행모의정위적환자각20례。환자앙와위、쌍상지상거、쌍수포두，진공부압기점고정，CT소묘후，재모의정위공작참학정등중심，통과격광정위계통，조절격광등병이상，주등중심체표표기。재치료계화계통설계치료계화，사용Varian EX 직선가속기적궤재영상계통（OBI）천복급추형속CT（kV CBCT ）진행소묘화배준험증，대험증오차진행대비분석。결과대공경16배라선CT유교고적시간분변솔、공간분변솔、밀도분변솔，제고료식관암술후방료조사야여제량분포적우화방안설계화방호적정학성，대공경16배라선CT모의정위적험증오차우우단배라선CT（t=-4.63,3.21,6.74；P＜0.05）。결론대공경16배라선CT재방료모의정위중적응용대대제고료방료정위적정학성，위정학계화、정학치료제공료보증。방료선진설비적응용가이개선식관암술후방료종류적국부공제솔화환자적생존솔。
Objective To explore the clinical effects and advantages of large-aperture 16-row spiral CT scanning in post-operative positioning-simulated radiotherapies for esophageal neoplasms. Methods positioning simulation was performed respectively in two groups of 20 patients with philips pQS single-row CT scanner and philips Brilliance Big Bore 16-row spiral CT scanner. All the patients were required to take postures like the supine position, double-upper-limb uplift and double-upper-limb cross with ifxation of the vacuum negative-pressure air cushion so as to receive the CT scanning. Then, location of the isocenter needed to be determined in the positioning-simulated workstation through deployment of the laser position system, adjustment of the laser lamp, bed placement and isocenter-marks-making on the physical surface. After treatment plans were generated by the treatment plan system, scanning and adjustment validation were performed with Varian EX on-board image (OBI) and cone beam CT (CBCT) system so as to compare and analyze the validation errors. Results Large-aperture 16-row spiral CT displayed the characteristics of higher time, spatial and density resolution, which improved the optimization design of the radiation ifeld and the dose distribution as well as the accuracy of radiation protection in post-operative radiotherapies for esophageal neoplasms. In comparison of validation errors, superiority was achieved by large-aperture 16-row spiral CT over single-row spiral CT (t=-4.63, 3.21, 6.74:p<0.05). Conclusion Deployment of large-aperture 16-row spiral CT in positioning-simulated radiotherapies greatly improved the accuracy of radiotherapy localization and provided the guarantee for accurate treatment plan designing and precise treatment. With the advancement of radiation equipment, it could be deployed to enhance the local control rate of radiated-tumors and the survival rate in post-operative radiotherapies for the esophageal neoplasms patients.
