Optimum shadow-casting illumination for endoscopic task performance.

Optimum shadow-casting illumination for endoscopic task performance.
复制标题

实现内窥镜任务性能的最佳阴影投射照明。

DOI：
10.1001/archsurg.139.8.889
复制
发表时间：
2004
期刊：
Archives of surgery
影响因子：
--
通讯作者：
A. Cuschieri
A. Cuschieri
中科院分区：
--
文献类型：
--
作者：
R. K. Mishra;G. Hanna;Stuart I. Brown;A. Cuschieri

文献摘要

被引文献

相似文献

假设 与无阴影对比度或最大阴影对比度相比，使用平衡程度的阴影和照明可以提高任务性能；头顶阴影投射照明比侧面照明更好。 设计 标准任务需要使用外科手术钩接触起伏表面上的靶点。每次运行由随机序列中的13个目标点组成。调查了五种设置：无阴影；由头顶照明产生22%、42%和65%的阴影对比度；以及由侧面照明产生22%的阴影对比度。每个外科医生按随机顺序完成3次运行，每个设置都是如此。 设置 苏格兰邓迪市尼威尔斯医院外科技能组的研究实验室。 参与者 十名外科实习生。 主要结果衡量标准 错误数和执行时间。 结果 阴影对比度设置比无阴影成像的误差更小(P&lt；.001)。与侧面照明相比，使用22%阴影对比度的工作错误率更低(P&lt；.001)。在头顶照明下，22%和42%的阴影对比度的错误率低于65%的最大阴影对比度(分别为P&lt；.001和P=.005)。在执行时间上没有发现明显的差异。 结论 采用头顶投影式照明和平衡的光照和阴影对比度，可获得最佳的内窥镜任务性能。
HYPOTHESES Task performance improves with the use of a balanced degree of shadow and illumination compared with no or maximum shadow contrast; and overhead shadow-casting illumination is better than side illumination. DESIGN The standard task entailed touching target points on an undulating surface by using a surgical hook. Each run consisted of 13 target points in a random sequence. Five settings were investigated: no shadow; 22%, 42%, and 65% shadow contrast created by overhead illumination; and 22% shadow contrast produced by side illumination. Each surgeon completed 3 runs with each setting in a random order. SETTING Research laboratory at the Surgical Skills Unit, Ninewells Hospital, Dundee, Scotland. PARTICIPANTS Ten surgical trainees. MAIN OUTCOME MEASURES Number of errors and execution time. RESULTS Shadow contrast settings had fewer errors than shadowless imaging (P<.001). Work with overhead 22% shadow contrast had a lower error rate than side illumination (P<.001). With overhead illumination, 22% and 42% shadow contrast were accompanied by a lower error rate than maximum shadow contrast of 65% (P<.001 and P =.005, respectively). No significant difference was found in the execution time. CONCLUSION Optimum endoscopic task performance is obtained with overhead shadow-casting illumination and a balanced degree of illumination and shadow contrast.