OCT image reflection and attenuation coefficient extraction method

A technology of attenuation coefficient and reflection coefficient, applied in the field of OCT technology, can solve the problems of human tissue interference, affecting processing quality and speed, etc., to achieve the effect of improving image processing speed and quality, improving processing speed and reducing calculation difficulty.

Inactive Publication Date: 2020-12-11
南京沃福曼医疗科技有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to invent a method for extracting OCT image reflection and attenuation coefficients for the OFDI method used in the existing OCT image extraction due to the interference of human tissue, which affects the processing quality and speed.

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  • OCT image reflection and attenuation coefficient extraction method
  • OCT image reflection and attenuation coefficient extraction method

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] Such as figure 1 shown.

[0033] A method for extracting OCT image reflection and attenuation coefficients is characterized in that it comprises:

[0034] (1) Attenuation coefficient extraction:

[0035]

[0036] Considering factors such as tissue reflection, attenuation, light source coherence length, lens point spread function and contrast agent absorption, the OCT signal can be expressed by the above formula; where I 0 is the output light power of the lens, T(z) is the point spread function of the lens, η is the absorption coefficient of the contrast agent, S(z) represents the coherence length of the light source, μ b is the reflection coefficient of the tissue, μ t is the tissue attenuation coefficient; Equation 1 can be written as:

[0037]

[0038] Take the logarithm on both sides:

[0039]

[0040] The attenuation coefficien...

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Abstract

The invention relates to an OCT image reflection and attenuation coefficient extraction method. The OCT image reflection and attenuation coefficient extraction method is characterized by comprising the steps of (1) attenuation coefficient extraction; and (2) reflection coefficient extraction. By simplifying an extraction formula, a required image can be quickly obtained. The method has the advantages of being simple and high in operability.

Description

technical field [0001] The invention relates to an OCT technology, in particular to an OCT image processing technology, in particular to an OCT image reflection and attenuation coefficient extraction method. Background technique [0002] At present, OCT and other technical means have been widely used in the diagnosis and treatment of various diseases. OCT technology is divided into time domain OCT and frequency domain OCT. Time-domain OCT uses a broadband light source, adjusts the z-axis delay through the reference arm, and images at different depths of the object to be measured. The speed is low and the clinical practicability is low; frequency-domain OCT is divided into two types: one is based on broadband light source plus spectroscopic The frequency-domain OCT system with a spectrometer structure; the other is a frequency-domain OCT (OFDI) based on a swept-frequency laser and a point detector structure. Because of its fast imaging speed and simple structure, OFDI has b...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/00G06F17/11
CPCA61B5/0066A61B5/0073G06F17/11
Inventor 徐亚伟李俊峡张毅焦力群黄进宇丁明陶魁园李世强张弢刘子旭鲁坤匡皓陆维
Owner 南京沃福曼医疗科技有限公司
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