Femtosecond laser guiding system and method based on dual-mode image

Abstract

The invention relates to a femtosecond laser guiding system and method based on a dual-mode image. The femtosecond laser guiding system comprises a laser transmitting unit, a dual-mode scanning imaging system, a laser galvanometer scanning unit, an image analyzing and processing unit, and a control module. The dual-mode scanning imaging system is used for collecting whole-eye three-dimensional image information; the laser galvanometer scanning unit transmits a femtosecond laser beam emitted by the laser transmitting unit to the eye, and performs three-dimensional scanning to acquire the position information of the femtosecond laser beam in the eye tissue; the image analyzing and processing unit is used for determining the real-time focusing position of the femtosecond laser beam in the eyetissue based on the position information acquired by the laser galvanometer scanning unit and generating a whole-eye three-dimensional image based on the whole-eye three-dimensional image informationacquired by the dual-mode scanning and imaging system; and the control module controls and adjusts laser pulse energy of the femtosecond laser beam and the focusing position of the femtosecond laserbeam in the eye tissue in real time according to the result output by the image analyzing and processing unit.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a dual-mode image-based femtosecond laser guidance system and method. Background technique [0002] In recent years, femtosecond laser technology has been introduced into the field of medical ophthalmology. Its application principle is to use its extremely short pulse width, small light pulse energy to obtain extremely high peak power and strong focusing ability, and can be completed in biological tissues. Precise cutting. At present, optical coherence tomography (OCT) is used to image the internal structure of eye tissue to guide femtosecond laser eye surgery. Optical coherence tomography has the characteristics of non-contact, no radiation, high detection sensitivity, and no damage. Optical coherence tomography It has become a standard technique for measuring the structure of the human eye in ophthalmic surgery. Optical coherence tomography human eye structure imaging...

AI Technical Summary

Problems solved by technology

In general ophthalmic surgery, the two operations need to be separated and one of the operations is performed first, and then the second or third operation is performed after the completion. The patient has a long waiting and treatment time, high treatment costs and great psychological pressure.

The current clinical ophthalmic surgery lacks a system that can detect the focal position of the femtosecond laser beam in real time and can deeply collect the image information of the whole eye. When any one of the above three optical coherence tomography technologies is used, it can only be used in a single function. To improve the effect of surgery, it is impossible to collect the focal position of the femtosecond laser beam in real time and obtain high-precision, high-resolution three-dimensional image information of the whole eye. Therefore, how to use the optical coherence tomography system (OCT) Accurately locate and collect images from the anterior segment to the middle segment of the eye to the fundus, formulate a surgical plan based on real-time image information, shorten the operating time, and improve the accuracy and safety of the operation. There is a very urgent application demand for femtosecond laser eye surgery.

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