Single-lights-source and double-waveband OCT imaging system

Abstract

The invention discloses a single-light-source and double-waveband OCT imaging system, which is characterized by comprising a signal source, a neutral attenuator, a circulator, a first coupler, an indicator light source, a reference arm, a sample arm, a second coupler, a first receiving device, a second receiving device, a multi-channel acquisition card and a computer. The OCT imaging system provided by the invention is based a double-waveband SOCT technology, and by analyzing optical characteristic differences of different tissue ingredients on two wavebands, the double-waveband SOCT technology, in comparison with a single-waveband SOCT technology, can achieve more accurate plaque ingredient automatic analysis with a lower computation complexity. The structure provided by the invention, based on a conventional OCT structure, can conduct OCT structural imaging on a sample, and in addition, the structure can implement automatic analysis on plaque ingredients, so that more reference information can be provided to medical personnel and an assisting effect can be achieved on disease diagnosis and treatment.

Description

technical field [0001] The invention relates to the field of OCT, in particular to a single light source dual-band OCT imaging system. Background technique [0002] Optical coherence tomography (OCT) is an emerging biomedical optical imaging technology, based on low-coherence interference technology, capable of deep imaging of strongly scattering media including biological tissues. Due to its high resolution, no radiation, non-contact measurement and other advantages, OCT is known as "optical biopsy" in the fields of biology and medicine. OCT uses the backscattered light of the biological tissue of the sample arm to interfere with the light of the reference arm. After signal acquisition and data processing, the tomographic structure of the biological tissue is reconstructed to form a three-dimensional imaging including depth information, and the internal structure of the organism is in vivo. Non-invasive detection observation. [0003] In the cardiovascular field, due to t...

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Problems solved by technology

The paper L Yu, J Kang etc, "Tri-band optical coherence tomography via optical parametric amplifier forendoscopic application", Optical Tomography & Spectroscopy, 2016:OTh2B.2 proposed a three-bandwidth based on 1.3um, 1.5um, 1.6um device, but due to the use of three different light sources, the structure is too complex and the cost is too high to be suitable for practical use. In addition, due to the introduction of spatial filtering, scatter noise and other system noise due to the complex structure, there are some deviations in the results

Patent CN101290292B proposes a multi-wavelength OCT system, but it is still a traditional structure OCT, which can only measure the structural information of the sample. In addition, it uses two independent light sources, which not only increases the cost of the system, but also increases the cost of the two bandwidth optical signals. Synchronization between is also a problem that needs to be solved

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