Multispectral surface diagnosis measuring method

A measurement method and multi-spectral technology, applied in the directions of diagnostic recording/measurement, diagnosis, medical science, etc., can solve the problem of inability to obtain quantitative hemoglobin information, and achieve the effect of helping disease diagnosis and treatment and enriching information

Active Publication Date: 2021-08-17
BEIHANG UNIV
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Problems solved by technology

For example, the "Traditional TCM facial complexion inspection system" with the publication number 200710045884.2; however, this system cannot obtain quantitative hemoglobin information, which is closely related to tissue blood oxygen and metabolism; compared with the single-position hemoglobin information obtained by blood drawing, The hemoglobin distribution of the entire face can be obtained through facial imaging, and the amount of information is much greater than the hemoglobin information measured by blood drawing

Method used

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  • Multispectral surface diagnosis measuring method
  • Multispectral surface diagnosis measuring method
  • Multispectral surface diagnosis measuring method

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Effect test

Embodiment

[0062] For a phantom with known optical absorption and scattering coefficients, use a spatial frequency of 0.1mm -1 The structured light whose intensity changes sinusoidally, is measured by wide-field imaging method, and the response image at this spatial frequency is obtained;

[0063] Specifically: irradiate the illumination patterns of 0°, 120°, and 240° phases to the face of the phantom in sequence, and use the camera to collect reflected light images, which are respectively recorded as I 1 , I 2 , I 3 , to demodulate these three images, sqrt(2) / 3*sqrt((I 1 -I 2 )^2+(I 2 -I 3 )^2+(I 3 -I 1 )^2), recorded as Demod_cal. Since the optical absorption and scattering coefficients are known, the existing model can be used to calculate the diffuse reflectance image of the phantom; in the diffuse reflectance image, the diffuse reflectance value of each pixel is Rd_cal;

[0064] Diffuse reflectance is the physical property of the scattering medium itself, and there is a map...

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Abstract

The invention discloses a multispectral face diagnosis measurement method, and belongs to the field of traditional Chinese medicine face diagnosis information acquisition. The method specifically comprises the following steps: firstly, irradiating a calibration phantom of a known diffuse reflectance image by using structured light with a spatial frequency fx aiming at a wavelength lambda to obtain a response image of the phantom to the current spatial frequency; then, usig the structured light for irradiating the face to be detected, and obtaining a response image and a diffuse reflection rate image in the same way; selecting the structured light with another spatial frequency fx' under the same wavelength lambda to irradiate the calibration phantom and the face to be measured, so as to obtain a new diffuse reflection rate image; calculating an optical absorption/scattering coefficient pair of the to-be-detected face at the wavelength lambda by using the at least two diffuse reflection rate images; and finally, fitting the hemoglobin concentration of each pixel position in the facial tissue to be detected by utilizing the corresponding absorption and scattering coefficient pairs under different wavelengths, and carrying out facial diagnosis. The absorption coefficient and hemoglobin concentration of facial tissue can be quantitatively measured by using structured light, and richer information is provided.

Description

technical field [0001] The invention belongs to the field of information collection of face-to-face diagnosis of traditional Chinese medicine, in particular to a multi-spectrum face-to-face measurement method. Background technique [0002] In the existing face-to-face diagnosis process of traditional Chinese medicine, light of different wavelengths is usually used to irradiate the face, and the wavelength of reflected light is collected, and facial information is collected with pattern recognition technology, so as to carry out the next step of diagnosis. For example, the "Traditional TCM facial complexion inspection system" with the publication number 200710045884.2; however, this system cannot obtain quantitative hemoglobin information, which is closely related to tissue blood oxygen and metabolism; compared with the single-position hemoglobin information obtained by blood drawing, The hemoglobin distribution of the entire face can be obtained through facial imaging, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/1455
CPCA61B5/14551
Inventor 樊瑜波赵雁雨
Owner BEIHANG UNIV
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