System and method for suppressing speckle noise in optic coherence tomography
An optical coherence tomography and speckle noise technology, which is used in the use of tomography for diagnosis, diagnosis, medical science, etc., to achieve the effects of small changes, improved OCT tomographic image quality, and reduced speckle noise
Active Publication Date: 2016-07-13
无锡欧因特光学科技有限公司
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to propose a speckle noise suppression method for OCT based on swept-frequency light sources (SS-OCT), which can effectively reduce speckle noise without sacrificing imaging speed and lateral resolution, thereby Improving the quality of OCT tomographic images
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[0032] refer to figure 1 , this embodiment takes the eyeball model as a sample.
[0033] A second collimator, a second mirror group, a third collimator and a fiber coupler FC3 are sequentially arranged on the optical path of the reference arm; the output end of the fiber coupler is the output end of the optical path of the reference arm. The second mirror group includes two mirrors whose normal lines are perpendicular to each other. The reference arm beam is output as a parallel beam after being focused by the second collimator, and then reflected by the second mirror group to form a parallel beam parallel to the aforementioned parallel beam. The light beam is transmitted to the fiber coupler through the third collimator and interferes with the backscattered light of the sample arm optical path, and the interference signal is measured by the balance detector.
[0034] In the optical path of the sample arm, there is also a lens group. The lens group uses two lenses L with diff...
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The invention discloses a system and method for suppressing speckle noise in optic coherence tomography.A frequency sweeping light source is connected with a sample arm light path and a reference arm light patch through a first light-path divider; the first light-path divider comprises a sample back-scattering light output end, the sample back-scattering light output end and the output end of the reference arm light path are connected with the input end of a balancing detector through a second light-path divider, and the output end of the balancing detector is connected with a data acquisition device; in the sample arm light path, two spectroscopes and a pair of reflectors are utilized for obtaining two parallel light paths, therefore light paths of incident light and returned light can have different selections, thereby three different optical path differences are formed, and in other words, based on subgraphs in different speckle modes, a sample image with speckle improved can be obtained by processing the three subgraphs.By means of the system and method for suppressing the speckle noise in optic coherence tomography, the imaging speed and the transverse resolution are not sacrificed, meanwhile, the speckle noise can be effectively lowered, and thereby OCT tomographic image quality is improved.
Description
technical field [0001] The invention relates to the technical field of low-coherence optical interference imaging, in particular to a system and method for suppressing speckle noise in optical coherence tomography imaging. Background technique [0002] Optical coherence tomography (OCT) is a low-coherence optical interference imaging technique. It can perform real-time three-dimensional imaging of the scattering structure of human body and other biological tissues in a non-contact and non-invasive manner. This technology has great potential in detecting diseases of fundus retina, digestive system, respiratory system, cardiovascular system, teeth and skin, etc. At present, OCT technology has been widely used in the diagnosis of retinal diseases, follow-up observation and treatment effect evaluation. Due to the need for fine observation and analysis of smaller lesion areas and quantitative evaluation of lesion areas of interest, the requirements for OCT imaging quality are b...
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Login to View More IPC IPC(8): A61B5/00A61B3/14A61B3/12
CPCA61B3/12A61B3/14A61B5/0066A61B5/0073A61B5/7203A61B3/10
Inventor 莫建华曹兆源陈新建
Owner 无锡欧因特光学科技有限公司