摘要
目的提出一种客观、准确且操作方便的三维内窥镜系统图像延时和双目图像时差的检测方法。方法将三维内窥镜系统作为整体被测对象,在白光模式和荧光模式下,分别用光电传感器采集光源、屏幕亮度变化的阶跃信号,利用示波器测量不同阶跃信号之间的时间差,从而得到2种模式下的图像延时及双目图像时差,并进行统计分析,验证2组的差异是否存在统计学意义。结果白光模式下的图像延时为(67.76±5.17)ms、荧光模式下为(71.52±4.30)ms;白光模式下的双目图像时差为(0.27±0.07)ms、荧光模式下为(0.38±0.08)ms。荧光模式下双目图像时差高于白光模式,且P=0.006<0.05,二者差异具有统计学意义。结论通过分析三维内窥镜系统的成像链路,检测整个内窥镜系统的图像延时和双目图像时差,为临床选择三维内窥镜系统提供参考。纯白光模式的图像延时更小、图像一致性更好、视频流的跟手性和流畅性更好,所以实际临床中建议以白光模式为主、荧光模式为辅,有助于减少图像延时和双目图像时差对临床操作者的影响,确保手术安全。
Objective To propose an objective,accurate and convenient detection method for image delay and stereoscopic image disparity of three-dimensional endoscope systems.Methods The three-dimensional endoscope system was taken as the overall measured object.In the white light mode and fluorescence mode,the step signals of the light source and screen brightness changes were collected respectively by the photoelectric sensor.The time difference between different step signals was measured by the oscilloscope,thereby obtaining the image delay and stereoscopic image disparity in the two modes.Statistical analysis was carried out to verify whether there was statistically significant difference between the two groups.Results The image delay in the white light mode was(67.76±5.17)ms,and that in the fluorescence mode was(71.52±4.30)ms.The time difference of stereoscopic image in white light mode was(0.27±0.07)ms and that in fluorescence mode was(0.38±0.08)ms.The time difference of stereoscopic image in fluorescence mode was higher than that in white light mode,and P=0.006<0.05,the difference between the two was statistically significant.Conclusion By analyzing the imaging link of the three-dimensional endoscopy system,the image delay and stereoscopic image disparity of the entire endoscopy system are detected,providing a reference for the clinical selection of three-dimensional endoscopy systems.The image delay in pure white light mode is smaller,the image consistency is better,and the follow-up and smoothness of the video stream are better.Therefore,in actual clinical practice,it is recommended to mainly use white light mode and supplement with fluorescence mode,which is helpful to reduce the impact of image delay and stereoscopic image disparity on clinical operators and ensure surgical safety.
作者
赵容娇
ZHAO Rongjiao(HANGZHOU SHINEVIATECHNOLOGY CO.,LTD.,Hangzhou Zhejiang 310000,China)
出处
《中国医疗设备》
2025年第6期55-60,68,共7页
China Medical Devices
关键词
三维内窥镜
图像延时
双目图像时差
白光模式
荧光模式
图像融合
3D endoscope
image delay
stereoscopic image disparity
white light mode
fluorescence mode
image fusion
