Effect of automatic image realignment on visuomotor coordination in simulated laparoscopic surgery
Effect of automatic image realignment on visuomotor coordination in simulated laparoscopic surgery
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DOI：
10.1016/j.apergo.2012.02.001
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发表时间：
2012-11-01
影响因子：
3.2
通讯作者：
Cao, Caroline G. L.
中科院分区：
文献类型：
--
作者：
Zhang, Likun;Cao, Caroline G. L.
在腹腔镜手术中，外科医生的手眼协调经常被内窥镜视野和实际手术视野之间的不一致映射所打乱。进行了两个实验，以检验自动图像重排对腹腔镜手术性能的影响。第一个实验研究了视觉-运动失调对腹腔镜手术效果的影响。在模拟的腹腔镜手术环境中，新手被随机分配到两种配对观察条件之一：1)内窥镜位于建模工作空间的中心，光轴为90度，或者与光轴为45度的受试者的中线成-45度；2)内窥镜要么与受试者的中线成0度，要么与受试者中线成180度，两者的光轴都为45度。每组12名受试者按照重复测量的混合设计，在指定的一对观看条件下进行动态点触任务，每组有八个图像方位。第二个实验考察了在任务中期激活的自动重新对齐机制(这样，如果任务开始时的映射未对齐，则重新建立显示和控制之间的一致映射)是否有助于提高性能。在重复测量设计中，12名新手受试者完成了与第一个实验相同的任务。在三个错位的视觉运动映射下检查性能，每个错位映射之后都是由自动重新对齐机制激活的重新对齐的映射。结果表明，当内窥镜图像与实际任务空间(0度图像方向)完全对准时，性能最好，但随着偏离完全对准而逐渐退化。受试者的表现在8个图像方向上保持一致，无论光轴方向和内窥镜位置。通过自动重新对准机构，提高了性能。建议在腹腔镜手术中，任何恢复视觉运动一致性的解决方案都应该首先使图像与任务空间对齐。这项工作对腹腔镜手术中可视化系统的设计具有一定的指导意义。(C)2012年爱思唯尔有限公司和人体工程学学会。版权所有。
During laparoscopic surgery, the surgeon's hand-eye coordination is often disrupted by the incongruent mapping between the orientation of the endoscopic view and the actual operative field. Two experiments were conducted to examine the effect of automatic image realignment on the performance of laparoscopic surgery. The first experiment investigated how visual-motor misalignment impacted laparoscopic surgery performance. Novice subjects were randomly assigned to one of the two paired viewing conditions in a simulated laparoscopic surgery environment: 1) the endoscope was either at the center of the modeled workspace with an optical axis of 90 degrees, or at -45 degrees from the midline of the subjects with an optical axis 45 degrees; 2) the endoscope was either at 0 degrees, or at 180 degrees from the midline of the subjects, both with an optical axis of 45 degrees. Each group of twelve subjects performed a dynamic point-and-touch task under the assigned pair of viewing conditions, each with eight image orientations, in a repeated-measures mixed design. The second experiment examined whether the automatic realigning mechanism that was activated mid-task (such that a congruent mapping between display and control was re-established if the mapping at the beginning of the task had been misaligned) was helpful to improve performance. Twelve novice subjects performed the same task as in the first experiment in a repeated-measures design. Performance was examined under three misaligned visuomotor mappings, each followed by the realigned mapping activated by the automatic realigning mechanism. Results showed that performance was best when the endoscopic image was perfectly aligned with the actual task space (0 degrees image orientation), but degraded progressively as a function of deviation from perfect alignment. Subjects' performance maintained a consistent pattern across 8 image orientations regardless of optical axis orientation and endoscope location. Performance was improved with the automatic realigning mechanism. It is recommended that any solution to restore the visuomotor congruency in laparoscopic surgery should first align the image with the task space. This work has implications for the design of visualization systems in laparoscopic surgery. (C) 2012 Elsevier Ltd and The Ergonomics Society. All rights reserved.