Clinical experience with a 3D surface patient setup system for alignment of partial-breast irradiation patients
Clinical experience with a 3D surface patient setup system for alignment of partial-breast irradiation patients
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DOI：
10.1016/j.ijrobp.2005.11.008
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发表时间：
2006-03-15
影响因子：
7
通讯作者：
Chen, GTY
中科院分区：
文献类型：
--
作者：
Bert, C;Metheany, KG;Chen, GTY
目的：评估表面成像在加速部分乳房照射（APBI）患者设置中的应用。方法与材料：采用激光与门静脉成像并行的摄影测量系统。9例患者在激光和端口膜设置后获得表面数据。通过使用刚性变换，将表面与第一次处理的参考表面进行比较分析。将激光设置后的曲面模型用于模拟摄影测量设置过程。此外，呼吸数据采用表面采集，帧率为7 Hz。结果：激光和端口膜的平均三维位移分别为7.3 mm （SD, 4.4 mm）和7.6 mm （SD, 4.2 mm）。模拟设置与摄影测量系统产生的平均位移为1mm （SD, 1.2 mm）。距离分析结果显示，激光、端口胶片和摄影测量的平均距离分别为3.7 mm （SD, 4.9 mm）、4.3 mm （SD, 5.6 mm）和1.6 mm （SD, 2.4 mm）。等中心呼吸运动小于3.7 mm，平均1.9 mm （SD, 1.1 mm）。结论：PBI装置的表面成像是有希望的。通过立体摄影测量实现的三维乳房表面对齐显示出比通过激光或门静脉成像建立的患者更大的乳房拓扑一致性。乳房表面与CTV的相关性必须定量确定。(C) 2006爱思唯尔公司
Purpose: To assess the utility of surface imaging on patient setup for accelerated partial-breast irradiation (APBI).Methods and Material: A photogrammetry system was used in parallel to APBI setup by laser and portal imaging. Surface data were acquired after laser and port-film setup for 9 patients. Surfaces were analyzed in comparison to a reference surface from the first treatment session by use of rigid transformations. The surface model after laser setup was used in a simulated photogrammetry setup procedure. In addition, breathing data were acquired by surface acquisition at a frame rate of 7 Hz.Results: Mean 3D displacement was 7.3 mm (SD, 4.4 mm) and 7.6 mm (SD, 4.2 mm) for laser and port film, respectively. Simulated setup with the photogrammetry system yielded mean displacement of 1 mm (SD, 1.2 mm). Distance analysis resulted in mean distances of 3.7 mm (SD, 4.9 mm), 4.3 mm (SD, 5.6 mm), and 1.6 mm (SD, 2.4 mm) for laser, port film, and photogrammetry, respectively. Breathing motion at isocenter was smaller than 3.7 mm, with a mean of 1.9 mm (SD, 1.1 mm).Conclusions: Surface imaging for PBI setup appears promising. Alignment of the 3D breast surface achieved by stereo-photogrammetry shows greater breast topology congruence than when patients are set up by laser or portal imaging. A correlation of breast surface and CTV must be quantitatively established. (C) 2006 Elsevier Inc.