Methods: The Sentinel system consis

Methods: The Sentinel system consists of a scanner unit, containing the laser and the camera, and
surface-matching registration software. For the registration procedure, both a computed tomography
(CT) and a Sentinel image can be used as a reference. Tests were performed on phantoms using
an Elekta SynergyVR beam modulator Linac equipped with a cone beam CT (CBCT), a HexaPOD
RT couch top, and an iViewGT portal imaging system. Experiments conducted in this study tested
reproducibility of the Sentinel surface acquisition and of set-up procedure, accuracy in quantifying
known phantom mispositioning, and compared Sentinel, CBCT, and portal imaging system
performance.
Results: Reproducibility of surface acquisition and setup procedure was better than 0.5mm and
0.5 and 1mm and 0.4, respectively. The system accuracy was better than 1mm and 1 when a
Sentinel image was used as reference. A global worsening of Sentinel performance was observed
using as reference an external surface extracted from CT study. This effect is probably due to small
differences in considered surfaces, caused by different imaging modalities. The results obtained by
testing the system on rigid phantoms were comparable to those obtained using CBCT and better
than those obtained with conventional portal imaging systems.
Conclusions: The Sentinel setup verification device is a reproducible and consistent system able
to detect misalignments with accuracy better than 1mm and 1. When tested on rigid body
phantoms, Sentinel and CBCT performed similarly. When compared to portal imaging, both
Sentinel and CBCT were more accurate. VC 2012 American Association of Physicists in Medicine.
[DOI: 10.1118/1.3675973]
Key words: surface matching, patient setup, registration, optical system

結果 (中文) 1:

方法: 定点系统由包含包含激光和相机，扫描仪单位和曲面匹配的注册软件。有关的注册过程，这两个断层(CT) 和定点图像可以作为参考。试验使用的幻影医科达 SynergyVR 梁调制器直线加速器配备锥束 CT (总站)，六足RT 沙发顶部和成像系统 iViewGT 门户。在这项研究的实验测试重复性的哨兵地面数据采集和设置过程中，在量化精度已知幻像错位，相比前哨，总站和成像系统的门户性能。结果: 表面的购置和安装过程的重复性优于 0.5 毫米和0.5 和 1 毫米和 0.4，分别。系统的精度优于 1 毫米和 1 时哨兵图像被用作参考。全球环境的恶化的前哨性能观察使用作为参考提取 CT 研究外部表面。这种效应可能是由于小在考虑表面，引起不同成像方式的差异。所得到的结果试验对刚性幻影系统为例，获得使用 CBCT 相媲美，更好比那些获得与传统门户的成像系统。结论: 哨兵安装核查设备是可重复和一致的系统能要检测精度优于 1 毫米和 1 失调。当在刚体上进行测试幻影，哨兵和 CBCT 同样执行。当相比，门静脉成像，都哨兵和总站是更准确。VC 2012 美国医学物理学家协会。[DOI: 10.1118/1.3675973]关键词: 曲面匹配、 病人安装、 注册、 光学系统

結果 (中文) 3:

方法：该系统由一个扫描仪单元，包含激光和相机，和表面匹配注册软件。对于登记程序，两个计算机断层扫描（ct）和一个前哨图像可以用作参考。测试使用
科达synergyvr束调制器加速器配备锥形束CT（CBCT）的幻影，一个六
RT的沙发上，和iViewGT门户成像系统。在这项研究中测试的表面
定点采集和建立过程的重复性实验，量化
称幻影错位精度，比较前哨，CBCT，门静脉成像系统
性能。
结果重现性表面的获取和设置程序优于0.5mm和1mm 
0.5和0.4 ，分别。系统精度优于1mm和1 当
定点图像作为参考。一个全球恶化的哨兵的性能进行了观察，使用作为参考的外部表面从ct研究。这种效果可能是由于在考虑表面的小的，所造成的不同的成像方式的差异。所获得的结果在刚性体系统的测试与使用CBCT和比那些传统的门户成像系统获得更好的
获得。
结论：定点设置验证装置是一个可重复的和一致的系统能够
与精度优于1 检测偏差。刚体
幻影测试时，进行同样的前哨和CBCT。相比于门静脉成像，都
前哨和CBCT更准确。VC 2012美国医学物理学家协会。
[ DOI：10.1118 / 1.3675973】
关键词：表面匹配，病人设置，登记，光学系统