Eter N, Garbe S, Pauleit D, Schüttoff T, Schüller H
Department of Ophthalmology, University of Bonn Medical Center, Bonn, Germany.
Eur J Ophthalmol. 2003 Mar;13(2):196-201. doi: 10.1177/112067210301300212.
To determine the relationship between movements of the posterior and anterior eye segments during arbitrary gaze shifts and to obtain information for monitoring fixation during radiotherapy for ocular diseases.
We examined eye movements of ten emmetropic volunteers in a 1.5 T magnetic resonance system. Using a T2-weighted ultrafast turbo-spin echo sequence (UTSE), the eyes were examined within 21 seconds. Sagittal and transversal eye slices were obtained in five passages in five gaze directions (straight ahead, 15 degrees above, 15 degrees below, 15 degrees right and 15 degrees left of the primary position). Displacement of the posterior eye segment was analyzed in relation to the movement of the anterior segment in all directions.
The relationship between the movements of the anterior and posterior eye segment was 1:0.8 (+/- 0.06 SD) during horizontal gaze shifts and 1:1.16 (+/- 0.11 SD) during vertical gaze shifts.
Magnetic resonance imaging showed that the relationship between anterior and posterior eye segments was different during horizontal and vertical eye movements, indicating the presence of more than one center of rotation. Compared to the anterior eye segment, there was less displacement of the posterior eye segment during horizontal eye movements and more displacement during vertical eye movements.
确定在任意注视转移过程中眼球后段和前段运动之间的关系，并获取眼部疾病放射治疗期间监测注视的信息。
我们在1.5T磁共振系统中检查了10名正视志愿者的眼球运动。使用T2加权超快涡轮自旋回波序列（UTSE），在21秒内对眼睛进行检查。在五个注视方向（正前方、原位置上方15度、下方15度、右侧15度和左侧15度）的五个通道中获取矢状和横向眼切片。分析了眼球后段相对于前段在各个方向上的位移。
在水平注视转移过程中，眼球前段和后段运动之间的关系为1:0.8（±0.06标准差），在垂直注视转移过程中为1:1.16（±0.11标准差）。
磁共振成像显示，在水平和垂直眼球运动过程中，眼球前段和后段之间的关系不同，表明存在多个旋转中心。与眼球前段相比，眼球后段在水平眼球运动期间的位移较小，而在垂直眼球运动期间的位移较大。
Zotero 插件