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Helical scanning common path interference type endoscopic frequency-swept OCT (Optical Coherence Tomography) real-time imaging method and helical scanning common path interference type endoscopic frequency-swept OCT real-time imaging system

A real-time imaging system and helical scanning technology, applied in the fields of endoscopy, medical science, diagnosis, etc., to achieve the effect of smooth movement, reducing distortion, and avoiding missed detection of lesions

Active Publication Date: 2014-03-12
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

However, the helical scanning at the tip of the probe and the frequency-sweeping OCT imaging method and system using a common path interference structure have not been reported yet.

Method used

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  • Helical scanning common path interference type endoscopic frequency-swept OCT (Optical Coherence Tomography) real-time imaging method and helical scanning common path interference type endoscopic frequency-swept OCT real-time imaging system
  • Helical scanning common path interference type endoscopic frequency-swept OCT (Optical Coherence Tomography) real-time imaging method and helical scanning common path interference type endoscopic frequency-swept OCT real-time imaging system
  • Helical scanning common path interference type endoscopic frequency-swept OCT (Optical Coherence Tomography) real-time imaging method and helical scanning common path interference type endoscopic frequency-swept OCT real-time imaging system

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Embodiment Construction

[0033] Such as figure 1 As shown, the helical scanning co-path interference type endoscopic frequency-sweeping OCT real-time imaging system proposed by the present invention comprises: a frequency-sweeping light source 1, a first single-mode optical fiber 2, an optical circulator 3, a second single-mode optical fiber 4, and an optical coupler 5. The third single-mode optical fiber 6, the air bag 7, the endoscopic probe 8, the fourth single-mode optical fiber 9, the fifth single-mode optical fiber 10, the balance detector 11, the rotating motor 21, the connecting wire 22 and the computer 26. The frequency-sweeping light source 1 is a near-infrared broadband light source with fast wavelength scanning. The light emitted by it passes through the first single-mode optical fiber 2 to the input port a of the optical circulator 3, and then exits from the middle port b of the optical circulator 3 and passes through The second single-mode fiber 4 reaches an optical coupler 5 . The opti...

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Abstract

The invention relates to a helical scanning common path interference type endoscopic frequency-swept optical coherence tomography (OCT) real-time imaging method and a helical scanning common path interference type endoscopic frequency-swept OCT real-time imaging system. A light splitter and a reference lens are arranged in a probe, so that the whole system is formed into a common path interference structure, a micromotor mounted in the probe is used for carrying out the smooth helical scanning of a focused illuminating light beam, and the frequency-swept OCT technology which does not require mechanical scanning movement along the depth direction of a sample is adopted to achieve the purpose of fast imaging; and finally, a series of digital signal processing is carried out on the acquired interference signals to obtain the three-dimensional image of the detected sample. The invention is characterized in that: the system is not sensitive to various interferences, the probe is plug-and-play, three-dimensional imaging is real-time, image distortion is little, and the omission of pathological changes is reduced.

Description

technical field [0001] The invention relates to medical endoscopic imaging technology and optical coherence tomography imaging technology, in particular to an endoscopic frequency-sweeping optical coherence tomography real-time imaging method and system using a spiral scanning mode and a common path interference structure. Background technique [0002] Human lesions mostly start from the inside of tissues and organs. Therefore, many imaging techniques with tomographic capabilities, such as computed tomography, nuclear magnetic resonance, X-ray, and ultrasound, are playing a huge role in clinical diagnosis. However, these techniques can only provide a resolution of 0.1 to 1 mm, which is far from the level of resolution required to detect early tissue abnormalities. Optical coherence tomography (OCT) technology can non-invasively image the internal structure and certain physiological functions of tissues and organs, and has the high resolution level (up to micron level) requi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B1/04A61B1/07
Inventor 杨亚良李喜琪张雨东邱传凯高洋
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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