Feasibility study of a non-invasive eye fixation and monitoring device using a right-angle prism mirror for intensity-modulated radiotherapy for choroidal melanoma.
Feasibility study of a non-invasive eye fixation and monitoring device using a right-angle prism mirror for intensity-modulated radiotherapy for choroidal melanoma.
复制标题
DOI：
10.1093/jrr/rrw104
复制
发表时间：
2017-05-01
影响因子：
2
通讯作者：
Hashida N
中科院分区：
文献类型：
--
作者：
Inoue T;Masai N;Shiomi H;Oh RJ;Uemoto K;Hashida N
我们的目的是描述一种新的非侵入性的固定和监测（F-M）设备的眼球（使用直角棱镜镜作为光轴引导）的可行性和有效性在三个连续的脉络膜黑色素瘤患者接受调强放疗（IMRT）。该装置由固定壳体、直角棱镜镜、高倍率光学变焦摄像机、导向灯、数字录音机、个人电脑、国家电视系统委员会标准模拟视频电缆组成。使用直角棱镜镜，确定前后轴与连接角膜和瞳孔中心的光轴一致。然后将轴连接到安装在治疗床上远端侧的引导灯和摄像机。使用这种方法可以提高重新定位的准确性。此外，透镜的位置误差在水平方向上从±1.16、±1.68和±1.11 mm显著降低至±0.23、±0.58和±0.26 mm，在垂直方向上从±1.50、±1.03和±0.48 mm显著降低至±0.29、±0.30和±0.24 mm（分别为患者#1、#2和#3）。因此，F-M设备方法通过IMRT逆向计划减小了计划靶体积大小并改善了危及器官的剂量体积直方图参数。重要的是，治疗方法耐受性良好。
We aimed to describe the feasibility and efficacy of a novel non-invasive fixation and monitoring (F-M) device for the eyeballs (which uses a right-angle prism mirror as the optic axis guide) in three consecutive patients with choroidal melanoma who were treated with intensity-modulated radiotherapy (IMRT). The device consists of an immobilization shell, a right-angle prism mirror, a high magnification optical zoom video camera, a guide lamp, a digital voice recorder, a personal computer, and a National Television System Committee standard analog video cable. Using the right-angle prism mirror, the antero–posterior axis was determined coincident with the optic axis connecting the centers of the cornea and pupil. The axis was then connected to the guide light and video camera installed on the couch top on the distal side. Repositioning accuracy improved using this method. Furthermore, the positional error of the lens was markedly reduced from ±1.16, ±1.68 and ±1.11 mm to ±0.23, ±0.58 and ±0.26 mm in the horizontal direction, and from ±1.50, ±1.03 and ±0.48 mm to ±0.29, ±0.30 and ±0.24 mm in the vertical direction (Patient #1, #2 and #3, respectively). Accordingly, the F-M device method decreased the planning target volume size and improved the dose–volume histogram parameters of the organ-at-risk via IMRT inverse planning. Importantly, the treatment method was well tolerated.