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为外科手术提供整体解决方案
A Detection Method for Image Delay and Stereoscopic Image Disparity of 3D Endoscope System
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.
