Precision Alignment in Cell Microinjection Based on Hybrid Triple-View Micro-Vision

Z Liang, Z Chen, Q Wu, X Gao… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
Z Liang, Z Chen, Q Wu, X Gao, X Zhang
IEEE Transactions on Robotics, 2023ieeexplore.ieee.org
Alignment between the injection pipette and the holding pipette/biological entity is crucial for
successful cell microinjection. Precision alignment can reduce cell damage and improve cell
microinjection. However, in the traditional microscopic vision-based method, lack of depth
perception is a drawback in monocular vision. On the other hand, stereo vision with a limited
baseline distance and field of view (FOV) makes it challenging to observe biological
samples. In this article, a novel hybrid triple-view micro-vision system, in which a binocular …
Alignment between the injection pipette and the holding pipette/biological entity is crucial for successful cell microinjection. Precision alignment can reduce cell damage and improve cell microinjection. However, in the traditional microscopic vision-based method, lack of depth perception is a drawback in monocular vision. On the other hand, stereo vision with a limited baseline distance and field of view (FOV) makes it challenging to observe biological samples. In this article, a novel hybrid triple-view micro-vision system, in which a binocular telecentric micro-vision unit and an inverted microscope are combined for scene depth and detail sense, is presented for cell microinjection. Based on this system, coarse-to-fine feature extraction methods for two discrepant pipettes are proposed, and a two-stage needle alignment strategy is established based on hybrid pose/image servo control. Some feature extraction and alignment experiments are implemented, and the results demonstrate that the proposed method achieves satisfactory alignment performance (mean position deviation: about 0.1  m; mean orientation deviation: about 0.4 ) for zebra embryo microinjection, and the defined symmetry measure can reach 0.09.
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