使用电子射野影像系统（aSi EPID）电影模式评估三维适形放疗中肺部肿瘤的计划靶区。
Planning target volume assessment in lung tumors during 3D conformal radiotherapy by means of an aSi electronic portal imaging device in cine mode.
机构信息
Radiotherapy Department, I.R.C.C.S.-C.R.O.B., Via Padre Pio 1, Rionero in Vulture, Pz, 85028, Italy.
出版信息
Clin Transl Oncol. 2013 Aug;15(8):638-42. doi: 10.1007/s12094-012-0984-y. Epub 2013 Jan 24.
PURPOSE
The major uncertainties in treating lung cancer are the repositioning errors and respiratory lung tumor motion. Typically, margins are added to the clinical target volume (CTV) to obtain a planning target volume (PTV) allowing the accommodation of such uncertainties. We want to test a new technique to assess the adequacy of the chosen PTV using an aSi electronic portal imaging device (EPID).
METHODS
Four patients affected by lung cancer and treated by radical 3D conformal radiotherapy (3DRT) were studied. During treatment the EPID was used in cine mode acquisition: acquired images were used to the aim.
RESULTS AND CONCLUSIONS
Treatment monitoring with an EPID in cine mode is shown to be a clinically feasible and useful tool.
目的
治疗肺癌的主要不确定因素是重新定位误差和呼吸肺部肿瘤运动。通常，会在临床靶区（CTV）上添加边缘以获得计划靶区（PTV），从而适应这些不确定性。我们希望使用 aSi 电子射野影像装置（EPID）来测试一种新的技术，以评估所选 PTV 的充分性。
方法
研究了 4 名患有肺癌并接受根治性 3D 适形放疗（3DRT）的患者。在治疗过程中，EPID 以电影模式采集：采集的图像用于目标。
结果与结论
用 EPID 在电影模式下进行治疗监测被证明是一种可行且有用的临床工具。
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