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Cardiovascular optical coherence tomography image enhancement method

An optical coherence tomography, image enhancement technology, applied in image enhancement, image analysis, image data processing and other directions

Active Publication Date: 2016-08-03
TIANJIN UNIV
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Problems solved by technology

[0003] The present invention provides a kind of optical coherence tomography image enhancement method in cardiovascular, and the present invention overcomes existing cardiovascular image depth information enhancement algorithm to change three kinds of different lesion plaques (calcified plaque, fibrous plaque, lipid plaque) in the original image Plaque) attenuation coefficient problem, a contrast enhancement and depth gain algorithm by optimizing the contrast coefficient is proposed to realize the enhancement of deep information, while the attenuation coefficient of different lesion plaques will not change drastically and will not cause damage to the front end of the internal scaffold. shadow

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[0038] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The specific embodiments described are only for explaining the present invention and are not intended to limit the present invention.

[0039] Such as figure 1 As shown, a method for enhancing intracardiovascular optical coherence tomography image provided by the present invention includes the following steps:

[0040] Step 1. Contrast enhancement is performed on each A-Line of the original OCT image in polar coordinates collected by the intravascular OCT imaging system to obtain image I en (z):

[0041] I en (z)=I n (z)(1)

[0042] In formula (1), z represents depth, I(z) and I en (z) respectively represent the light intensity values ​​before and after the contrast enhancement at depth z in the original image. The contrast is increased by exponential enhancement. n is the exponential term, as the contrast coefficient,...

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Abstract

The invention discloses a cardiovascular optical coherence tomography image enhancement method. Image depth information enhancement for cardiovascular optical coherence tomography in the visual effect can be realized through a traditional method which changes pathologic characteristics of an image, and pathologic characteristics analysis of a doctor is interfered, e.g., changes of cardiovascular plaque characteristic attenuation coefficients and generation of intra-tissue bracket front shadow. The method employs a depth gain algorithm optimizing contrast coefficients to enhance intra-tissue depth information for a cardiovascular optical coherence tomography image, so depth information enhancement is realized, and violent attenuation coefficient change and generation of intra-tissue bracket front shadow can be avoided.

Description

Technical field [0001] The present invention relates to optical coherence tomography (Optical Coherence Tomography, OCT) in cardiovascular imaging, which belongs to the field of cardiovascular imaging, and in particular to an enhanced image depth information in OCT cardiovascular images without causing drastic changes in lesion attenuation coefficients and shadows at the front end of stents in tissues. Methods. Background technique [0002] Intravascular OCT imaging technology is the current cardiovascular imaging method with the highest image resolution. It can accurately display intravascular ultrastructures, identify unstable coronary atherosclerotic plaques and thrombi, and assist in vascular stents in coronary intervention Placement, evaluation of the effect of postoperative stent implantation, and observation of stent intimal hyperplasia and coverage at the late stage of implantation have extremely important applications. The quality of cardiovascular images is very import...

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Application Information

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IPC IPC(8): G06T5/00A61B5/00
CPCA61B5/0033A61B5/0066A61B5/0084G06T5/00G06T2207/10101G06T2207/20172G06T2207/30048G06T2207/30101
Inventor 丁振扬刘铁根周永涵陶魁园刘琨江俊峰
Owner TIANJIN UNIV
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